@@aivonabeywardana4213 6:44 6:44 Thank you. I have every charger and transformer that ever existed at every voltage. Higher voltage will really help my issues?
Hmm, a neat little circuit, but I worry about folk who don't know what they're doing messing with mains voltages. At the very least, it should be encased in something to prevent straying fingers touching the 'wrong end'.
These small switchers are invariably flyback types. Significantly raising the output voltage of the supply MAY result in damage to the switch on the high-voltage side. If you are using an AC line voltage well below the allowed maximum you are probably safe. If your line voltage is already near the maximum allowed, you could destroy the switcher. The secondary voltage is "reflected" back to the input side and "stacked" on the supply voltage according to the turns ratio of the so-called transformer when the switch turns off and the energy stored in the input winding is being transferred to the output winding. This is the only time that the inductor really acts as a transformer, and it is a design limitation for a flyback converter. Typically the inductor is designed so there is some safety margin between the sum of the peak DC on the input side and the reflected output voltage and the voltage rating of the switch. If you increase the output voltage it may result in exceeding the maximum allowable voltage across the switch which usually causes it to fail short-circuit. Another potential problem is that many of these switchers use an extra winding on the inductor to power the switcher IC after it initially starts. If the output voltage is set too low the IC may get insufficient voltage to keep it running, resulting in in shutting down, trying to restart, running for a fraction of a second (typically) then shutting down again.
Very good information, earlier i show one circuit with multimeter after adding some circuit we able to measure led, zener diode , mcpc ect, and there voltage.
Fantástico! Indispensável na bancada de qualquer profissional da área da eletrônica. Parabéns e obrigado por compartilhar. Um respeito abraço do Brasil 🤗 🇧🇷🙏
These small switchers are invariably flyback types. Significantly raising the output voltage of the supply MAY result in damage to the switch on the high-voltage side. If you are using an AC line voltage well below the allowed maximum you are probably safe. If your line voltage is already near the maximum allowed, you could destroy the switcher.
It will work in low current range (ae no load), because voltage output element is transformer, that zener only for voltage stabilization via feedback circuit.
Well at least it's not as deadly as some - but i'd still look at that transformer closer before using it. Also most phone chargers will have a '431 reference of their own, so modifications are either easier or harder, depending on the circuit... Finally, you should never push a transformer winding too far outside it's design voltage, as things get quite inefficient - possibly even dangerous! There is a reason why a relay clicks in the benchtop power supply; it selects three taps on the secondary winding - 0-7V, 7-15V and the final one goes to 30V... Simply looking at transformer action etc. should make it clear as to why it does this (hint: it's to do with 3Amp output current) Here there is a 10K? resistor, to limit the current - so the power handling is actually not bad...
careful...folks will be looking for some POT. (Some of that wacky-backie, "smoke it and take a trip and never leave the farm!") Say Variable Resistor or POTentiometer.
Thank you very much for this very useful device. In my opinion because of the voltmeter power supply is maximum 30 Volts, you don't want to excess 29 Volts. If it is possible to increase the output voltage more than 30 Volts, you can add for example 7812 voltage adjusting device and take + 12 Volts for power supply of voltmeter. Thanks again. 👍
It's supposed to test the rated forward voltage of diodes by dropping down to their voltage when connected. One slip & you electrocute yourself it's stupid
I have analog version made from little tranformer 30V 150mA with current limiter at few mA so i can check the Zener diodes values up to 30V.....but this is AWESOME idea as well...very compact!!! Will do some of this as well for sure!!!
it is quite dangerous to OVERCLOCK the fly power supply at 6 V to 30 V with such a power, the reverse voltage on the output diode will grow (up to 250-300v) and it needs to be changed! but what is much more dangerous is the gratifying voltage on the 1 winding and the corresponding impuls on the MOSFET DRAIN inside the PWM CHIP! if it exceeds the limit for them (and this is very likely), then there will be a big EXPLOSION and possibly a fire! but the idea itself is of course interesting, just for the correct and safe release of it, you need to recalculate and rewind the transformer for your new voltage and replace the diode with a corresponding voltage 400-800v ulta fast diode!!!
... and his mounted Resistor is instead of 10 KΩ = 1 KΩ : brown-black-black x brown ➜ 1-0-0 x 10¹ ≙ 1000 Ω ! And why no one did realize that ! - ? ? { ͡ ๏ ̯͡๏ ?
@@ovidius2000 On output side U max = 30 V. M1U schematics (wih middle point) : reverse voltage on diode = 2*Umax out. If you have fullbridge rectifier : Urrs = U max out.
Forgive my ignorance, but what's the use of the pot if it's to be set to its highest value? Wouldn't be more convenient to use a resistor, was it 500K?
It was possible for me to do without all this and just put only a 30 volt zenner diode.. but I wanted to communicate the idea to everyone.. Maybe you want 16 volts or 12 volts...
@@Inventor_AWthanks for your reply, but what I was thinking is what is the point of having that maximum value adjustable: do you get more accuracy if you keep the highest voltage at 16V instead of 30V or I don't know how high it can go. Could I place a pot with external knob so I can adjust it as needed?
crt tv fly back nosel which is having high heat resistance, cut the half inch straight part and push on soldering sucker that work well and this way sucker white plastic tip will not damage the pcb. Please make a short vlog on this.
i advice you to use a piece of silicon cable isolator for your soldering pump's end pipe. it's original part is normally too rigid plastic and you can buy a lastic cover but they are expensive, whereas 2-3 cm silicon cable cover is almost free and more useful than original one.
@@Inventor_AW i don't know your country's trade conditions but we can find the silicon cables at any electrician shop. for this application (to cover soldering pump edge or mouth) it's ideal just 6 mm outer diameter of cable isolator.
here multimeters are cheap at harbor freight, etc. Does this do something a regular multimeter can not? It might be more useful to use a case mountable potentiometer that can be easily adjusted and make this into a variable power supply. you could use this voltage display or use a voltmeter ammeter display.
I just did this, was testing a smd LED, touched the uninsulated connections to the power supply inlet with my elbow…. Muscle spasmes and my arm shot out…. Punched the cat….. cat went out the window…. Landed on my old school teachers head….she fell over onto my car and broke my door mirror! Thanks! Now I have no door mirror and a vets bill for a cats PTSD fear of heights and a school teacher that now gives my kids bad reports at school parents evenings! All for saving a couple dollars on a ready made unit!
@@yusufgaridi9523 now you, I don't understand, on account of the fact you make no sense... You're better off blowing things up instead, like national monuments!
Pregunta este proyecto lo puedo utilizar para el funciomiento de un taladro que consume 18 v.? Muchas gracias desde Cartagena Colombia y muchas bendiciones
Interesting, but I would have picked a better charger to modify. That's one of those dangerous Chinese suicide chargers that doesn't even have a fuse or interference filter, and if CY1 is really a Y-rated capacitor and not just a 1KV cap I'd be surprised. I don't even like having those things around.
I have a question? Can it modified to use the Multimeter, We will not be spending on extra Voltmeter and Probe and if Yes. Please share the modified schematic. Eu tenho uma pergunta? Pode ser modificado para usar o multímetro, não gastaremos com voltímetro e sonda extras e se sim. Por favor, compartilhe o esquema modificado.
great idea, but LEDs are current sensitive it means that if more current is passed than what a led is designed for , it may cause burning. most of 5mm LEDs requires about 20mA to work properly. so how output current is controlled!!
There is no worry about current because there is a 10k resistor connected in series with the voltage source. On the other hand, the voltage rises at the expense of the current decrease
Grand idea and useful point. I at first thought you were going to just make a adjustable power supply, but what you made was very good a testing device for Zener diode mostly or LED diode power value. I am still shocked to see the original power adapter have the possibility of 30 volts. I'm assuming that phone charger is a 5-6 volt power adapter, so that Zener diode had a lot of blocking to do. It is no shock these can still overheat. That voltage drop energy has to go somewhere....
I'm guessing that if this is a so called "universal input voltage" model, it won't make 30 VDC in the US. But you are right in that if it was designed like that, there's a lot o wasted energy and heating, built into the design. I guess it's easier and makes manufacturing simple, but it is inefficient. I'm in the US with the 120v 60Hz standard and I've seen a lot of issues with this universal input designs. Mostly, underperforming issues. I suppose the heat and efficiency issues are more likely in the 240V world. I hate looking at these kind of videos for a bit and then realizing what they are building was designed for the 240 volt world! I get that there are only about a billion of us using split phase voltage, 60 Hz in the100-125 volt range and that many more people have the 240is volt, 50Hz standard, but realistically, most of those people can't even read!! AW says it doesn't matter, but in many cases it does. Just my two cents, but electricity as distributed, is not universal. The physics works the same no matter where you live. But when you are modifying consumer goods for alternate purposes, one needs to understand that those items really are universal. Modification you make to devices in one country, very well may not work in another,
@@professorg8383: questo progetto va bene sia per alimentatori per 230 volt sia per 110 volt. La dissipazione è uguale in entrambi i tipi di alimentatore perché il funzionamento è switching.
Bruh, I've got to say this has been one of the best demonstrations on how to desolder components from a PCB. I WILL be referencing this in the future when I move and have time to get into electronics again...
THAT WAS BEAUTIFUL ! I tried to take an electronics course at a local high school tech night-school, but there weren't but 5 in my class. I was 15 and tge average age was 25 to 40. They cancelled our class & gave us the choice of getting our tuition back or choose another class. I went to MACHINE SHOP. What you did I followed, but didn't understand the WHY's and Where-fores. I understand, pretty much, what each thing does, kind-of, but not together. Please do a video on HOW components do the outcome, together. My expertise was rewires and burn-ups on Locomotives. I let somebody else take care of the solid state stuff. Thanks again fir your content. It was very well done! I'm fixing to SUB.
Qual é o objetivo desse tipo ferramenta? Calcular a tensão consumida por determinado componente? No próprio multímetro ja nao é possível fazer isso? Qual a ideia por tras de injetar tensao num componente na placa?
Добрий день. Стабілітрона не має. Не ту модель прислали, якась проста но 6 Вольт і 1 Ампер. Підскажіть будьласка, де можна подивитися, на такому адаптері схему? Дуже хочеться зробити. Буду Вам Вдячний.
Acho sensacional esse tipo de recurso eletrônico para recuperar aquilo que está danificado e até melhorar o seu funcionamento. A eletrônica sempre me fascinou desde de criança. Meu pai estudava eletrônica via correios e chegou a montar um rádio. Enfim, o video foi muito interessante.
essa pecinha azul serve para aumentar e diminuir a voltagem? por que tem um no AVR do meu gerador e eu aumentei e vi que mesmo ele em marcha lenta a energia ficou mais forte, só que não sei se isso pode estragar ele.
I am industrial technician, repairing and installing freeze and cold systems. I´m not into electronics repair, but that looks great tool for you guys. I saw the complete video, very interesting. Thanks for uploading clear and good quality explaining. Best,
@@Inventor_AW feedback can only change the voltages according to it's reference, what about the amperage ? I don't know what was the amperage rating in your modified adapter, how it handled the 15v led bulb load 🤔 I've modified a laptop adapter recently, ratings was 19.7v / 5A. But when I increased the voltage amperage goes lower, and when decreasing the voltage it's came to it's full amperage 5A.
@@atifservicecenter Yes, the voltage rises due to the decrease in the ampere.. But in my project, I used it only to test the zener diode and the LEDs and this does not require a high current
@@arsalanzia feedback controls the value of the voltage coming out of the transformer.. In the circuit used, the zener diode and the optocoupler represented the feedback
@@svetozar161 Я за німців не відповідаю. Те, що російською мовою "ручеёк, ток", українською "струмок, струм". Якщо є схожість мов - значить була якась дружба. У нас, у слов'ян, назві місяців схожі. Порівняйте з білоруською мовою, польською. А російські назви місяців схожі на англійську мову. Значить росіяни піндоси.
Because there is a 10k resistor connected in series with voltage source, this resistance allows the appropriate voltage to pass , and prevents the rest of the voltage behind it
Bonjour votre montage m'intéresse fortement mais pourriez-vous indiquer la marque et modèle du chargeur car j'en ai déjà démonté plusieurs qui n'ont pas du tout la même configuration. Cordialement
"Watch to the end". Okay then. Start watching at 5:10. There a idea of construction: Zener diode tester, with 10k series rezistor to DC 30V modified adapter output. Scheme of TL431 mod: 1:20
Hi, I never through old electronic stuff and it very often find its use, even just for study of their design and not only electric parts ... Regards Jean-François
I'm assuming he replaced the cap with a higher voltage rated one. Otherwise the original cap would have popped like a party favor when the output was cranked up to max.😳 you could use an LM317 too.
Exposed wires carrying mains voltage is very unsafe. To everybody who are reading this comment, please be careful of the high voltage and insulate it to reduce chances of getting electrocuted. Everything you do with electricity is at your own risk. Thank you 🙏
Hi sir.if the probs of voltmeter is used the wrong way ( not the right pollarity) will it burn the led when it is being tested? Or it does not matter and nothing will happen?!
Wow it's so awesome. Really I fulfill my all requirement from this project. Thanks to share this knowledgeable video for us. "The Technical Learner" ( Mr.Chandrakant.S, From India.)
Great except phone chargers aren't analogue devices any more, they all have logic in them that negotiates current and voltage with the device you connect them to.
This is a super cool device that I would have had use for recently! Instead, I took LEDs of differing voltage ratings and a whole bunch of resistors to make them equal brightness. Question: how can this circuit measure the "voltage" of an LED, which obviously can be safely run at different voltages? How does it find the nominal or ideal voltage?
A semiconductor PN junction has a certain forward voltage, depending on physics and chemistry. If you apply a rising voltage to it in the correct direction, nothing happens until that threshold voltage is reached and then current starts to flow. Raising the voltage will dramatically increase the *current* flowing through the junction, while the voltage across remains fairly constant, until it overheats and dies. Here a 10k resistor is put in series to limit the maximum current. The 30V is high enough to turn the PN junction on, which then remains at its forward voltage, with the remainder dissipated across the resistor. The voltmeter simply measures across the PN junction, showing the forward voltage, which is relatively independent of the current.
Добрий вечір. А який номер моделі адаптера ви використовуєте? Купив в Китаї з номером моделі 0610, но не такі там деталі. 6 вольт 1 ампер. Буде обідно, якщо ви не дасте відповідь на моє запитання. Дякую.
Привіт.. Звичайно, схеми зарядного пристрою відрізняються, але не дуже.. Якщо модель, яку ви використовуєте, не має стабілітрона, це означає, що вона має TL431, і це інший спосіб його модифікації.
Доброго дня. А у Вас є така схема? Я поки що початківець, який може паяти і дивитися, як Ви це робите. Я дуже Вам вдячний за відповідь. Здоров'я Вам і натхнення.
Warning: ⚠ ⚠ ⚠ have fun but always remember to be Safe, anything you try is at your own Risk , thank you
Can you use any phone charger on the table?
@@aivonabeywardana4213 6:44 6:44 Thank you. I have every charger and transformer that ever existed at every voltage. Higher voltage will really help my issues?
@@gaswirt ❤❤❤
Hmm, a neat little circuit, but I worry about folk who don't know what they're doing messing with mains voltages. At the very least, it should be encased in something to prevent straying fingers touching the 'wrong end'.
Thank you for the great solution and footage. Please make another video with the installation of components in which a 110v power supply will be used
These small switchers are invariably flyback types. Significantly raising the output voltage of the supply MAY result in damage to the switch on the high-voltage side. If you are using an AC line voltage well below the allowed maximum you are probably safe. If your line voltage is already near the maximum allowed, you could destroy the switcher.
The secondary voltage is "reflected" back to the input side and "stacked" on the supply voltage according to the turns ratio of the so-called transformer when the switch turns off and the energy stored in the input winding is being transferred to the output winding. This is the only time that the inductor really acts as a transformer, and it is a design limitation for a flyback converter. Typically the inductor is designed so there is some safety margin between the sum of the peak DC on the input side and the reflected output voltage and the voltage rating of the switch. If you increase the output voltage it may result in exceeding the maximum allowable voltage across the switch which usually causes it to fail short-circuit.
Another potential problem is that many of these switchers use an extra winding on the inductor to power the switcher IC after it initially starts. If the output voltage is set too low the IC may get insufficient voltage to keep it running, resulting in in shutting down, trying to restart, running for a fraction of a second (typically) then shutting down again.
thank you for saving my time!!!!!!!!
Very good information, earlier i show one circuit with multimeter after adding some circuit we able to measure led, zener diode , mcpc ect, and there voltage.
thanks for watching
Fantástico! Indispensável na bancada de qualquer profissional da área da eletrônica. Parabéns e obrigado por compartilhar. Um respeito abraço do Brasil 🤗 🇧🇷🙏
Obrigado
@@Inventor_AW9l😅
These small switchers are invariably flyback types. Significantly raising the output voltage of the supply MAY result in damage to the switch on the high-voltage side. If you are using an AC line voltage well below the allowed maximum you are probably safe. If your line voltage is already near the maximum allowed, you could destroy the switcher.
It will work in low current range (ae no load), because voltage output element is transformer, that zener only for voltage stabilization via feedback circuit.
Well at least it's not as deadly as some - but i'd still look at that transformer closer before using it.
Also most phone chargers will have a '431 reference of their own, so modifications are either easier or harder, depending on the circuit...
Finally, you should never push a transformer winding too far outside it's design voltage, as things get quite inefficient - possibly even dangerous! There is a reason why a relay clicks in the benchtop power supply; it selects three taps on the secondary winding - 0-7V, 7-15V and the final one goes to 30V... Simply looking at transformer action etc. should make it clear as to why it does this (hint: it's to do with 3Amp output current)
Here there is a 10K? resistor, to limit the current - so the power handling is actually not bad...
if you just turn the pot around, you would get increasing voltage with clockwise rotation....
, 😊😊😊
Why *you{͡ ಠ ̯͡ಠ}* are telling this deep secret ㋛ ! - _? ?_
@@ernstlessau8208he he!!!
careful...folks will be looking for some POT. (Some of that wacky-backie, "smoke it and take a trip and never leave the farm!")
Say Variable Resistor or POTentiometer.
Thank you very much for this very useful device. In my opinion because of the voltmeter power supply is maximum 30 Volts, you don't want to excess 29 Volts. If it is possible to increase the output voltage more than 30 Volts, you can add for example 7812 voltage adjusting device and take + 12 Volts for power supply of voltmeter. Thanks again. 👍
I just didn't want to strain the transformer
Why waste our time. Tell us at the start what this is supposed to do.
Exactly.
It's supposed to test the rated forward voltage of diodes by dropping down to their voltage when connected. One slip & you electrocute yourself it's stupid
are you a puny and arrogant muslim?
@@neiliewheeliebinmost of these electronic channels are
Diode tester. It works to seek the voltage of LEDs and Zenners. And it drives LED series.
I have analog version made from little tranformer 30V 150mA with current limiter at few mA so i can check the Zener diodes values up to 30V.....but this is AWESOME idea as well...very compact!!! Will do some of this as well for sure!!!
Your idea is good but this is dodgy as hell somebody will get hurt I think you know this
it is quite dangerous to OVERCLOCK the fly power supply at 6 V to 30 V with such a power, the reverse voltage on the output diode will grow (up to 250-300v) and it needs to be changed!
but what is much more dangerous is the gratifying voltage on the 1 winding and the corresponding impuls on the MOSFET DRAIN inside the PWM CHIP! if it exceeds the limit for them (and this is very likely), then there will be a big EXPLOSION and possibly a fire!
but the idea itself is of course interesting, just for the correct and safe release of it, you need to recalculate and rewind the transformer for your new voltage and replace the diode with a corresponding voltage 400-800v ulta fast diode!!!
... and his mounted Resistor is instead of 10 KΩ = 1 KΩ :
brown-black-black x brown ➜ 1-0-0 x 10¹ ≙ 1000 Ω !
And why no one did realize that ! - ? ? { ͡ ๏ ̯͡๏ ?
Yes, it can destroy the mosfet, but the reverse voltage on the output diode will be about 60 v, not 250-300v.
@@mikemir6738why?TheMaxVoltageIs EfectiveVoltage times 1.41 🤔?
@@ovidius2000 On output side U max = 30 V. M1U schematics (wih middle point) : reverse voltage on diode = 2*Umax out. If you have fullbridge rectifier : Urrs = U max out.
@@ernstlessau8208 47k , а у него 4,7 ком желтый-фиолетовый-красный
Forgive my ignorance, but what's the use of the pot if it's to be set to its highest value? Wouldn't be more convenient to use a resistor, was it 500K?
It was possible for me to do without all this and just put only a 30 volt zenner diode.. but I wanted to communicate the idea to everyone.. Maybe you want 16 volts or 12 volts...
@@Inventor_AWthanks for your reply, but what I was thinking is what is the point of having that maximum value adjustable: do you get more accuracy if you keep the highest voltage at 16V instead of 30V or I don't know how high it can go. Could I place a pot with external knob so I can adjust it as needed?
@@alessandroricci7294 Yes, you can use it as a variable voltage source, but the higher the voltage, the lower the ampere
crt tv fly back nosel which is having high heat resistance, cut the half inch straight part and push on soldering sucker that work well and this way sucker white plastic tip will not damage the pcb.
Please make a short vlog on this.
I will
Thanks to the clear and concise way you explain it makes one want to go do it right now
❤️❤️
*Не стоит забывать о том , что не смотря на изменение выходного U , выходная P (мощность) = остаётся прежней* ☝
Не, она упала более чем в 2 раза. Поэтому диод не сгорел
i advice you to use a piece of silicon cable isolator for your soldering pump's end pipe.
it's original part is normally too rigid plastic and you can buy a lastic cover but they are expensive, whereas 2-3 cm silicon cable cover is almost free and more useful than original one.
Thanks for the advice.. Yes I know it and you can find it on an old CRT TV high voltage transformer cable
@@Inventor_AW
i don't know your country's trade conditions but we can find the silicon cables at any electrician shop. for this application (to cover soldering pump edge or mouth) it's ideal just 6 mm outer diameter of cable isolator.
nice, but why don't you show the schematics of this diode-replacement (potentiometer circuit) at 2:33 ?
thanks , We replaced the fixed zenner diode with the variable one
Depending on voltage drop in wattage is how much heat your have to absorb
Que bueno !!! Te felicito un buen probador de diodos comunes , zener y led, lo voy hacer , gracias amigo . y Viva la libertad, carajo !!!
VLLC!!!
Gracias y buena suerte
here multimeters are cheap at harbor freight, etc. Does this do something a regular multimeter can not? It might be more useful to use a case mountable potentiometer that can be easily adjusted and make this into a variable power supply. you could use this voltage display or use a voltmeter ammeter display.
So nice to see a fellow who actually knows how to solder!
thank you bro
I just did this, was testing a smd LED, touched the uninsulated connections to the power supply inlet with my elbow…. Muscle spasmes and my arm shot out…. Punched the cat….. cat went out the window…. Landed on my old school teachers head….she fell over onto my car and broke my door mirror! Thanks! Now I have no door mirror and a vets bill for a cats PTSD fear of heights and a school teacher that now gives my kids bad reports at school parents evenings! All for saving a couple dollars on a ready made unit!
A wonderful fairy tale .. Thank you for sharing
And the fact that the PWM controller will be powered by more than 6 times the increased voltage does not matter?
Sir, the voltage has gone up and the ampere has gone down. As you can see, it is only used for testing and has not been overloaded
Thank you for the useful information, you explained it clearly and made it easy to understand! 👌🏻
Verdade
easy to understand......even to lezard-men like you
@@yusufgaridi9523 now you, I don't understand, on account of the fact you make no sense... You're better off blowing things up instead, like national monuments!
Pregunta este proyecto lo puedo utilizar para el funciomiento de un taladro que consume 18 v.? Muchas gracias desde Cartagena Colombia y muchas bendiciones
No, la corriente a 18 voltios será inferior a 1 amperio.
I like how you explain what the name and number of the part your using
thanks for watching
Interesting, but I would have picked a better charger to modify. That's one of those dangerous Chinese suicide chargers that doesn't even have a fuse or interference filter, and if CY1 is really a Y-rated capacitor and not just a 1KV cap I'd be surprised. I don't even like having those things around.
I have a question? Can it modified to use the Multimeter, We will not be spending on extra Voltmeter and Probe and if Yes. Please share the modified schematic.
Eu tenho uma pergunta? Pode ser modificado para usar o multímetro, não gastaremos com voltímetro e sonda extras e se sim. Por favor, compartilhe o esquema modificado.
Yes you can.. It's simple.. Connect the black wire of the multimeter to GND and the red wire to the 10k resistor
Thanks to you, I can evaluate our old chargers, thank you very much...
great idea, but LEDs are current sensitive it means that if more current is passed than what a led is designed for , it may cause burning. most of 5mm LEDs requires about 20mA to work properly. so how output current is controlled!!
There is no worry about current because there is a 10k resistor connected in series with the voltage source. On the other hand, the voltage rises at the expense of the current decrease
Thank you sir! very amazing! But what happened to LED?
which LED?
Grand idea and useful point. I at first thought you were going to just make a adjustable power supply, but what you made was very good a testing device for Zener diode mostly or LED diode power value.
I am still shocked to see the original power adapter have the possibility of 30 volts. I'm assuming that phone charger is a 5-6 volt power adapter, so that Zener diode had a lot of blocking to do.
It is no shock these can still overheat. That voltage drop energy has to go somewhere....
Very interesting noticed
The zener is part of the regulation circuit with the opticoupler, it wasn't directly on the output
@ Ok, I have seen that on a older circuit years ago, the Zener being the last low end regulator after many voltage dropping resistors and capacitors.
I'm guessing that if this is a so called "universal input voltage" model, it won't make 30 VDC in the US. But you are right in that if it was designed like that, there's a lot o wasted energy and heating, built into the design. I guess it's easier and makes manufacturing simple, but it is inefficient.
I'm in the US with the 120v 60Hz standard and I've seen a lot of issues with this universal input designs. Mostly, underperforming issues. I suppose the heat and efficiency issues are more likely in the 240V world.
I hate looking at these kind of videos for a bit and then realizing what they are building was designed for the 240 volt world! I get that there are only about a billion of us using split phase voltage, 60 Hz in the100-125 volt range and that many more people have the 240is volt, 50Hz standard, but realistically, most of those people can't even read!! AW says it doesn't matter, but in many cases it does.
Just my two cents, but electricity as distributed, is not universal. The physics works the same no matter where you live. But when you are modifying consumer goods for alternate purposes, one needs to understand that those items really are universal. Modification you make to devices in one country, very well may not work in another,
@@professorg8383: questo progetto va bene sia per alimentatori per 230 volt sia per 110 volt. La dissipazione è uguale in entrambi i tipi di alimentatore perché il funzionamento è switching.
Bruh, I've got to say this has been one of the best demonstrations on how to desolder components from a PCB. I WILL be referencing this in the future when I move and have time to get into electronics again...
I wish you a good luck
THAT WAS BEAUTIFUL !
I tried to take an electronics course at a local high school tech night-school, but there weren't but 5 in my class. I was 15 and tge average age was 25 to 40. They cancelled our class & gave us the choice of getting our tuition back or choose another class. I went to MACHINE SHOP.
What you did I followed, but didn't understand the WHY's and Where-fores. I understand, pretty much, what each thing does, kind-of, but not together.
Please do a video on HOW components do the outcome, together. My expertise was rewires and burn-ups on Locomotives. I let somebody else take care of the solid state stuff.
Thanks again fir your content. It was very well done! I'm fixing to SUB.
Qual é o objetivo desse tipo ferramenta? Calcular a tensão consumida por determinado componente? No próprio multímetro ja nao é possível fazer isso? Qual a ideia por tras de injetar tensao num componente na placa?
O multímetro não mede o LED mais de 3 volts
Добрий день. Стабілітрона не має. Не ту модель прислали, якась проста но 6 Вольт і 1 Ампер. Підскажіть будьласка, де можна подивитися, на такому адаптері схему? Дуже хочеться зробити. Буду Вам Вдячний.
Привіт. Ви можете знайти схему в Google, щоб написати номер моделі
Very useful to discover the power of any components.
Acho sensacional esse tipo de recurso eletrônico para recuperar aquilo que está danificado e até melhorar o seu funcionamento. A eletrônica sempre me fascinou desde de criança. Meu pai estudava eletrônica via correios e chegou a montar um rádio. Enfim, o video foi muito interessante.
Obrigado ❤❤
Meu falecido pai aprendeu pelo instituto Universal Brasileiro, todo mês saia um livro diferente, chegavam partes do circuito todo mês pra montar.
ну радио это круто, но мой дядя собрал компьютер в 88 году, и это делали очень многие советские студенты) называется zx spectrum.l
essa pecinha azul serve para aumentar e diminuir a voltagem? por que tem um no AVR do meu gerador e eu aumentei e vi que mesmo ele em marcha lenta a energia ficou mais forte, só que não sei se isso pode estragar ele.
I am industrial technician, repairing and installing freeze and cold systems. I´m not into electronics repair, but that looks great tool for you guys. I saw the complete video, very interesting. Thanks for uploading clear and good quality explaining. Best,
Muito bom. Assim que eu tiver o voltímetro e o resistor variável, vou tentar fazer, um pois é muito útil. Saudações do Brasil.
Obrigado e desejo-lhe sucesso
I love it and I want to try but I want to use DIGITAL VOLT METER with AMP. how can I conect?
The same connections, in addition to connecting the amp wire in series with the load
@@Inventor_AW ..ok thanks bro 🥰🥰
Is it possible to make a power supply 5V 1.5A with this modification if I have a 2A charger ??
This modification is for controlling the voltage via feedback
Nice!
Looks similar to the TV backlight tester device.
Sir please make a video about auto on off timer circuit for any project.
I will
can we use lower voltage and amperage adapter? like old nokia charger voltage around 5v and current around 800mA?
Provided that it has the same feedback
@@Inventor_AW sorry didn't get what feedback is?
@@Inventor_AW feedback can only change the voltages according to it's reference, what about the amperage ?
I don't know what was the amperage rating in your modified adapter, how it handled the 15v led bulb load 🤔
I've modified a laptop adapter recently, ratings was 19.7v / 5A. But when I increased the voltage amperage goes lower, and when decreasing the voltage it's came to it's full amperage 5A.
@@atifservicecenter Yes, the voltage rises due to the decrease in the ampere.. But in my project, I used it only to test the zener diode and the LEDs and
this does not require a high current
@@arsalanzia feedback controls the value of the voltage coming out of the transformer.. In the circuit used, the zener diode and the optocoupler represented the feedback
Читаю: "Стабілітрон зі змінною частотою". Яка ще "частота" у стабілітрона? У нього інші параметри - напруга, струм, потужність.
а зачем вы украли из немецкого "strom"?
@@svetozar161 Я за німців не відповідаю. Те, що російською мовою "ручеёк, ток", українською "струмок, струм". Якщо є схожість мов - значить була якась дружба. У нас, у слов'ян, назві місяців схожі. Порівняйте з білоруською мовою, польською. А російські назви місяців схожі на англійську мову. Значить росіяни піндоси.
Great video thanks! Please can you tell me what model of mobile phone charger was used? My old ones have different PCBs internally...
Chinese charger 5V 2A
@@Inventor_AW Thanks 😊
Simplesmente brilhante a idéia! Só queria saber se podemos fazer com fonte de 5v? Saldaçoēs do Brasil🖒
O importante é que ele contenha um circuito de realimentação semelhante ao que usei no vídeo
Do the component values change for 120VAC? I noticed that the unit had a European plug so was probably running on 220VAC @ 50Hz.
no changes
Rapaz, muito bom mesmo. Simples mas eficaz. Parabéns pela excelente ideia. DEUS continue te abençoando.
Obrigado
Muy buen video y excelente explicacion. Muchas Gracias.
Gracias
Did you solder anything in place of the led?
no
would this work with a 2 wire (red/black) voltmeter? and how would you alter the circuit in that case?
2 wire voltmeter won't measure less than 3V
i dont understand the principle. when u put it to socket u already got voltage. then how come it can measure other voltage.?
Because there is a 10k resistor connected in series with voltage source, this resistance allows the appropriate voltage to pass , and prevents the rest of the voltage behind it
@@Inventor_AW i see. tqsm for this explanation
An excellent and necessary device, thank you!!!
Hi What are the specs of the phone charger you used to build this?
Chinese charger 2 amp
Did you just plug into mains voltage to fiddle with it?
I had to test like this so that no one would suspect the video...but I know what to do
¿QUE MARCA ES EL CARGADOR? / WHAT BRAND IS THIS CHARGER?
Es solo un cargador chino.
Здравствуйте.Лазерные диоды с cd rw или другие лазеры, проверяет? Вы, можете дать ответ?
I wonder how many times you got shocked by the mains during making this.
0
Saludos desde Medellin muchas gracias por compartirnos tus grandiosas investigaciones
Please make a video with the installation of components in which a 110v power supply will be used
the same coponents
@@Inventor_AW thanks for the solution
Nice trick, don’t forget to change the output capacitor to one with 30v or over
I replace it to 50V cap
Bonjour votre montage m'intéresse fortement mais pourriez-vous indiquer la marque et modèle du chargeur car j'en ai déjà démonté plusieurs qui n'ont pas du tout la même configuration. Cordialement
Cette restriction s'applique à tout chargeur doté du même circuit de rétroaction
"Watch to the end".
Okay then.
Start watching at 5:10.
There a idea of construction:
Zener diode tester, with 10k series rezistor to DC 30V modified adapter output.
Scheme of TL431 mod: 1:20
how much current is that thing able to output?...
200mA almost
Hi I wanted to ask what maximum current output would be possible if I use charger 12v 2.5a for this project?
As the voltage increases, the current decreases
Thank You. Could you tell me if this set could handle 6v 5amp or 3v 10amp?
no@@robertmalinowski5451
Muito bom. Pelo que eu entendi voce usa uma fonte de 6v 1a. Se eu usar uma fonte de 12v 1a também vai dar certo ou preciso fazer alguma mudanca?
Você não precisará de nenhuma alteração
WOW!!! Thank you so much for sharing your tips and tricks with all of us and I’m very impressed 😊
Can you buy this type of device premade? What is it called?
There is " LED tester ".. but be careful because the output is +300 volts
Hi, I never through old electronic stuff and it very often find its use, even just for study of their design and not only electric parts ...
Regards
Jean-François
That 470 uF 16v cap dies anyway on these units anyway. Even without the mod it’s a good idea to replace it.
I'm assuming he replaced the cap with a higher voltage rated one. Otherwise the original cap would have popped like a party favor when the output was cranked up to max.😳 you could use an LM317 too.
Is it possible to make this circuit with a powerbank?
Watch project number 1.. Replace the 9 volt battery with a power bank
th-cam.com/video/iI48JwVuNLw/w-d-xo.html
Exposed wires carrying mains voltage is very unsafe. To everybody who are reading this comment, please be careful of the high voltage and insulate it to reduce chances of getting electrocuted. Everything you do with electricity is at your own risk. Thank you 🙏
Hi sir.if the probs of voltmeter is used the wrong way ( not the right pollarity) will it burn the led when it is being tested?
Or it does not matter and nothing will happen?!
Nothing will happen
Thanks for replying
Great idea. Wondefull information. Thanks my friend.
thanks for watching
First video I watch... I already like you. Subscribed!
thanks
電子部品を買うのと、
テスターを買うのとでは
どちらが簡単なのでしょうか？
捨てましょう、
充電器だけではなくそれ全部を
Don't mess around with high voltage ⚡
Maybe he's just giving advice
So is all that work worth the outcome ? I question this ! Its too much for the avarage joe to do !
The average person doesn't have to get involved in something to do with electricity, sir
Wow it's so awesome. Really I fulfill my all requirement from this project. Thanks to share this knowledgeable video for us.
"The Technical Learner"
( Mr.Chandrakant.S, From India.)
Can you use any phone charger on the table?
yes , if it has the same feedback
Не плохо вы очень просто придумали, как проверять светодиоды сколь они употребляют напряжения, с уважением Евгений. 💯👍
Great except phone chargers aren't analogue devices any more, they all have logic in them that negotiates current and voltage with the device you connect them to.
Serve para medir todos tipos de capacitor? Substitui o capacimetro?
Não, não tem nada a ver com capacitores
This is a super cool device that I would have had use for recently! Instead, I took LEDs of differing voltage ratings and a whole bunch of resistors to make them equal brightness.
Question: how can this circuit measure the "voltage" of an LED, which obviously can be safely run at different voltages? How does it find the nominal or ideal voltage?
A semiconductor PN junction has a certain forward voltage, depending on physics and chemistry. If you apply a rising voltage to it in the correct direction, nothing happens until that threshold voltage is reached and then current starts to flow. Raising the voltage will dramatically increase the *current* flowing through the junction, while the voltage across remains fairly constant, until it overheats and dies. Here a 10k resistor is put in series to limit the maximum current. The 30V is high enough to turn the PN junction on, which then remains at its forward voltage, with the remainder dissipated across the resistor. The voltmeter simply measures across the PN junction, showing the forward voltage, which is relatively independent of the current.
Well explained
This is an incredible explanation, thank you so much!
Добрий вечір. А який номер моделі адаптера ви використовуєте? Купив в Китаї з номером моделі 0610, но не такі там деталі. 6 вольт 1 ампер. Буде обідно, якщо ви не дасте відповідь на моє запитання. Дякую.
Привіт.. Звичайно, схеми зарядного пристрою відрізняються, але не дуже.. Якщо модель, яку ви використовуєте, не має стабілітрона, це означає, що вона має TL431, і це інший спосіб його модифікації.
Доброго дня. А у Вас є така схема? Я поки що початківець, який може паяти і дивитися, як Ви це робите. Я дуже Вам вдячний за відповідь. Здоров'я Вам і натхнення.
І ще. Лазерні діди можна провірять, на скільки вони вольт. А то під'єднав більшу напругу і спалив.
Так передбачається, що зарядний пристрій хоч і старий, але робочий? Звичайно ж, не треба викидати те, що ще працює.
Excelente video. Sus videos son muy útiles.
I own an UT33C since 2016.
Ola, posso usar um carregador de 5V 500mA? Hy, can I use a 5V 500mA charger?
Você pode usar qualquer carregador desde que contenha o mesmo feedback
Earned a sub. Great content!
thank u
Daha düşük voltaj ölçüyor bu cihaz 220 ölçebilirmi lütfen cevap
Kusura bakmayın sorunuzu anlamadım
Solche Netzteile können Tödlich werden,wenn es einen Durchschlag der Netzspannung zur Niedervoltseite gibt.Ein Trafo ist 1000 Mal besser.
Es enthält einen bereits isolierten Transformator
Здравствуйте. Лазерные диоды можно проверять, на сколько вольт? А то подключил 3.7 V, сразу сгорел.
why do you not make an introduction, explain what you will be making beforehand?
Ah, recreating the buck step down/step up converter. except with those you can independently adjust current and voltage.
Y que pasó con el amperaje????
A medida que aumenta el voltaje, la corriente disminuye