I just finished building. I changed the diodes and a couple other things. As I built using 2x 24V 2A transformers (the amps are very much needed in the bull plop in which I dabble) in parallel also with a voltage doubler throw switch incorporated into it (I tend to get into some crazy schtick when working alone... seems as if I need to humor myself just to stay awake...). Honestly ... It is very very very precise for the most part! I killed current pot tho. LMAO. Other than that. VERY impressed. I just got my new lab psu about a week ago... NOT that I needed a new one. I was just keeping up with the Jones's. I was looking to build a new one from scratch. I have been reviewing a few different schematics over the last couple weeks. This one seems extremely simplistic and I very much had my apprehensions. However... I was very much proved wrong and sometimes it does seem that less is MORE.... just like the linux command... lol Thanks for the great idea!
The polarity of C1 is backwards in the schematic diagram shown and so is the full wave bridge rectifier. The PLUS should go to the emitter of VT2 and the negative of the power supply should go to ground.
@@franzliszt8576 Why so? I'm trying to learn how this circuitry works. Kaysan's video's seem very simple to understand, but I want to understand each part of it before I dare trying it out for myself.
Hello Kasyan, I liked your videos, but it would be good if you explain the working of all the components in a circuit or say complex components (which are not easy to understand at first sight) so that more and more people would be comfortable using them.
i think rectifier positive pole and capacitor positive pole would be changed to emiter of tip 42 is it correct or not please confirm one more think that is positive and negative are short
Good stability for voltage drop when the bulbs are powered ! 5 seconds for shortcircuit are resonable but Try to implement a circuit solution with a permanent protection .
How does the combination of VT1 and VT2 work exactly? Your video's seem very simple to understand, but I want to understand each part of it before I dare trying it out myself.
Ive had trouble with the transformer and bridge rectifiier part of this type of circuit in the past. what about omitting those two components and get the desired fixed voltage from an ac Adapter ? like one from a radio the little black box things you plug into the wall with a jack on the other end....? Im sure you know what I mean lol. will this work the same as an input voltage you wold get from the trans/rectifier components? or would the amps not be adjustable as its fixed coming out of the ac adapter?
If you use that, you can ommit the transformer and the full bridge rectifier (along with the capacitor, if you'd like). The only problem would be the output voltage and output current of your adapter. And should you do a short circuit, you might blow the fuse inside the adapter.
since it's a liner power supply i assume i can't adjust it for higher amperage or the T2 will over heat or i can get away if i replace it with a power transistor ? and if i can what should i adjust to get more amps ?
Hi, Aka ... I didnt know you have english channel as well ... your English sound surprisingly good ... except for things like pronouncing linear (произносится "линеар", а не "лайнеар") ... удачи братан ))
Hi. If i replace the diode can i get more voltage from it? I really need a good power supply and it would be nice circuit and not a very expensive stuff
Several circuits Kasyan has presented are very interesting, educative and even a joy to see. But this circuit/project has some problems and difficulties, as it presents 2 mistakes in the diagram: (1) inverted polarity in rectifier bridge; (2) inverted polarity filtering 2200uFd capacitor. Also, circuit configuration does not provide consistent current limitation from one build to another, as it appears to be made using the transistor gain (beta) properties, which varies a lot from sample to sample. A simpler signal Transistor and shunt resistor (about 0.5 Ohm) could provide current limitation & protection, without affecting voltage stability. Several other projects made by Kasyan already perform much better than this one; use those instead.
My concerns are 1: does shut off when is fully charged the battery? 2: can you connected to a Generator and then when the battery is fully charged will then shut down and when the battery is low in power will start again to charge it? I look forward to your reply please if you can provide diagram of what I am asking for.
This does not have a charge protection because it's a simple power supply. And yes you can use a generator for your electricity, though you have to look for the output of that generator to see if it's still enough to be above your desired voltage because the voltage regulator is a step down converter.
Hola, buen trabajo... El diagrama esquemático tiene errores y a un aficionado no le servirá.. Hay que invertir el puente rectificador RL 207 y el condensador C1 2200 uf y funcionara perfecto...
I made this circuit,i used for two days.on third day while i was charging the lithium battery Tip 42 c burns and there is no resistance among those three pins.May i know why this happens?
may I apply this to control the amperes with battery Lzz guide us!!!! because I need 8amps to charge the battery but solar plate sent to battery 12amps we need 8amps
5 ปีที่แล้ว
Hi. I am following and learning from youIt.But this circuit is not working. I made it, but the resistance of 470R was given out smoke! After calculations I noticed that if it's power is 0.25 watt, only 23 mA can pass through. Which means 9V maximum output can be taken. So it must be at least 2 Watts. Also the rectifier nodes must be changed as others mentioned.
Hi, Can we use your method to charge Ni-MH Type Battery? having INPUT: 220VAC and OUTPUT: 190-220VDC (adjustable) with 1-6amp (adjustable)? Please guide accordingly...
Hi , May be an idea for a new experiment. I got 10pcs lm317 for $1 from TK Electronics , on Ebay and believe it or not those work as original from ST and do not blow up even at 39 Volts input and short-circuit , current limiting works at 1.5 Amp. I build a linear regulator powersupply using a lm431(instead of a 10kohm pot) to drive the LM317 (in my case 6pcs in parallel). It resulted in an extreme stable powersupply.
Did you ever post this project? I would like to see it. But, TH-cam will not let you post the link in the comment section (unless it is a TH-cam address,) so you will have to find some way to code the link description to be something that we can understand.
Ohhhh. Where do I start? Ok. Your polarities are incorrect. Switch the connection to the bridge rectifier as well as the orientation of the capacitor C1 and the circuit will work. Your polarity indication at the output is labelled correctly but according to the take off from the bridge that would be a common positive. Also VT2 needs positive input at the emitter.
If your transformer outputs 25 volts the voltage regulator needs to dissipate a lot of heat, the efficiency will drop as well. In other words, you need a bigger cooling block.
can i use this circuit in motorcycle for charging battry and 55-60watt headlight bulb? i have Yamaha rx135, we self made it coil and its output is 60v 6a when i accelerate bike on full throttle. we need 12v 5a for headlight and 12v to 14v 1a for charging the battry. do i need to make some changes in circuit? then what is it? please reply...... Thank You. :)
It is probably limited to 15 volts because that is either the maximum of that linear voltage converter or the transformer gives 15 volts from the power from the wall.
Nice vedio thanx for the same. Sir I want to design a power supply of 12 volt 20 amp current adjusted. Kindly guide me how can I achieve. I shall be highly grateful. Regards
I want to buid 0 to 30V and 0 to 20A adjusted power supply w/ current limiter protection , what component must be replace/modified? Oh all was clear from your explaination before, cos I watch this video partially, I'm sorry bro
anyone pliss help me, i modified this circuit, use adapter dc 18v 2A, no bridge rectifier, 220uF 35v, 1n5402, pot 10k for voltage, pot 5k for current. component burn, and jumper also burn. when i put load at ouput. component burn
Hello, Can you guide me for limiting the output current to 350mA of a power supply (with output 250vdc, max output 15Amp). Should I simply add 0.22 Ohm 10W (9 Resisters) in Parallel before load?
Tech Maker change power supply, like a 35 volt@3 Ampere one, find a 32 volt Zener Diode, change transistor to a more suitable one (like TIP42) and reduce value of the 470 ohm resistor(i used 220 ohm 2watt resistor and obtained output current of 4 ampere)
![[Live สด] การออกรางวัลสลากกินแบ่งรัฐบาล งวดวันที่ 16 ธันวาคม 2567](http://i.ytimg.com/vi/dNTiBBthKgQ/mqdefault.jpg)
I just finished building. I changed the diodes and a couple other things. As I built using 2x 24V 2A transformers (the amps are very much needed in the bull plop in which I dabble) in parallel also with a voltage doubler throw switch incorporated into it (I tend to get into some crazy schtick when working alone... seems as if I need to humor myself just to stay awake...). Honestly ... It is very very very precise for the most part!
I killed current pot tho. LMAO. Other than that. VERY impressed. I just got my new lab psu about a week ago... NOT that I needed a new one. I was just keeping up with the Jones's. I was looking to build a new one from scratch. I have been reviewing a few different schematics over the last couple weeks. This one seems extremely simplistic and I very much had my apprehensions. However... I was very much proved wrong and sometimes it does seem that less is MORE.... just like the linux command... lol
Thanks for the great idea!
this is the only diy youtube channel i will ever watch ever again
Great job ! Simple yet functional power supply
At last! Someone who knows how to display schematics on videos
The polarity of C1 is backwards in the schematic diagram shown and so is the full wave bridge rectifier. The PLUS should go to the emitter of VT2 and the negative of the power supply should go to ground.
i think this design wont ever work,even as you corrected
CCCP transformer :D My Man!
Fuck off commie!
capacitor polarity is inverted dear, it could explode or set fire, be very carefull with this !!! ✴✴✴
Seems your rectifier is inverted . the dc output is directly going to ground. WRONG
C1 is also inverted.
Should R4 be in between VT1 emitter and VD2? Should 20V RMS make C1 closer to 28-29V?
@@chiefrunningfist 50 v would be much better and safer
@@franzliszt8576 Why so? I'm trying to learn how this circuitry works. Kaysan's video's seem very simple to understand, but I want to understand each part of it before I dare trying it out for myself.
@@JasonRobards2 damn i made this comment 2 months ago i have completely forgot about it i will tell you soon your answer.
Hello Kasyan,
I liked your videos, but it would be good if you explain the working of all the components in a circuit or say complex components (which are not easy to understand at first sight) so that more and more people would be comfortable using them.
What is the function of that 1k 2w resistor?
i think rectifier positive pole and capacitor positive pole would be changed to emiter of tip 42 is it correct or not please confirm one more think that is positive and negative are short
Good stability for voltage drop when the bulbs are powered ! 5 seconds for shortcircuit are resonable but Try to implement a circuit solution with a permanent protection .
How does the combination of VT1 and VT2 work exactly? Your video's seem very simple to understand, but I want to understand each part of it before I dare trying it out myself.
The first feeds the base of the second, it is to amplify the current gain
What is the purpose of VD2 diode and R5 resistor? It would be nice if you added short circuit protection.
Very simple and efficient!
Thank you very much !
Ive had trouble with the transformer and bridge rectifiier part of this type of circuit in the past. what about omitting those two components and get the desired fixed voltage from an ac Adapter ? like one from a radio the little black box things you plug into the wall with a jack on the other end....? Im sure you know what I mean lol. will this work the same as an input voltage you wold get from the trans/rectifier components? or would the amps not be adjustable as its fixed coming out of the ac adapter?
If you use that, you can ommit the transformer and the full bridge rectifier (along with the capacitor, if you'd like). The only problem would be the output voltage and output current of your adapter. And should you do a short circuit, you might blow the fuse inside the adapter.
can I use Mosfets instead of PNP andNPN for higher voltage?
No
What's that 1N5408 diode for?
cluod you make a smps version with current and voltage controll ?
Сделано в СССР!!!! Ураааа!!!
Hi bro... Can we use 2N4007 diode and bridge rectifeir insdead the others which you used ?
Nice, I understand and a clear explanation of components,thank you..
thx kaysan tv cuz i am a beginner
since it's a liner power supply i assume i can't adjust it for higher amperage or the T2 will over heat
or i can get away if i replace it with a power transistor ?
and if i can what should i adjust to get more amps ?
Hi, Aka ... I didnt know you have english channel as well ... your English sound surprisingly good ... except for things like pronouncing linear (произносится "линеар", а не "лайнеар") ... удачи братан ))
what hapens to your circuit entrance + dc is common with the out - is it so?
Hi. If i replace the diode can i get more voltage from it? I really need a good power supply and it would be nice circuit and not a very expensive stuff
Several circuits Kasyan has presented are very interesting, educative and even a joy to see.
But this circuit/project has some problems and difficulties, as it presents 2 mistakes in the diagram:
(1) inverted polarity in rectifier bridge; (2) inverted polarity filtering 2200uFd capacitor.
Also, circuit configuration does not provide consistent current limitation from one build to another, as it appears to be made using the transistor gain (beta) properties, which varies a lot from sample to sample. A simpler signal Transistor and shunt resistor (about 0.5 Ohm) could provide current limitation & protection, without affecting voltage stability.
Several other projects made by Kasyan already perform much better than this one; use those instead.
"Several other projects made by Kasyan already perform much better than this one; use those instead." Please list those for us.
Can you help me how to make an AC (230V input) to DC converter with adjustable output voltage (0-30V) and current (0-10A)?
why 10A
How can I modify this circuit for 30v 5a? I have tip2955 pnp and darlington/normal npn transistors.
The circuit is very good, but it would be better with a current limit indicator ... Maybe a led indicator
fantastic bro I love your video and great bcz you give a print and also circuit diagram
Can you increase the amp to 4A and voltage 20V plizzz next video 🙏🙏🙏
im waiting for this request too....
@@froogybaby
Not coming 😑
My concerns are 1: does shut off when is fully charged the battery? 2: can you connected to a Generator and then when the battery is fully charged will then shut down and when the battery is low in power will start again to charge it? I look forward to your reply please if you can provide diagram of what I am asking for.
This does not have a charge protection because it's a simple power supply. And yes you can use a generator for your electricity, though you have to look for the output of that generator to see if it's still enough to be above your desired voltage because the voltage regulator is a step down converter.
Can i use SMPS instred of transformer.if i used SMPS ,is it necessary to use the sender diode.
Hola, buen trabajo...
El diagrama esquemático tiene errores y a un aficionado no le servirá..
Hay que invertir el puente rectificador RL 207 y el condensador C1 2200 uf y funcionara perfecto...
Can i use 2N3055 instead of BD139 to get up to 10 or 5 amp? * my transformer can supply up to 10 amps
if i use a 5/10 amp transformer the ckt will control the current or not ????
I made this circuit,i used for two days.on third day while i was charging the lithium battery Tip 42 c burns and there is no resistance among those three pins.May i know why this happens?
may I apply this to control the amperes with battery Lzz guide us!!!!
because I need 8amps to charge the battery but solar plate sent to battery 12amps we need 8amps
Hi. I am following and learning from youIt.But this circuit is not working. I made it, but the resistance of 470R was given out smoke! After calculations I noticed that if it's power is 0.25 watt, only 23 mA can pass through. Which means 9V maximum output can be taken. So it must be at least 2 Watts. Also the rectifier nodes must be changed as others mentioned.
Hi,
Can we use your method to charge Ni-MH Type Battery? having INPUT: 220VAC and OUTPUT: 190-220VDC (adjustable) with 1-6amp (adjustable)?
Please guide accordingly...
NO
nice one , can this supply adjust frequency too? i need to change frequency to my EIT
No
Hi , May be an idea for a new experiment. I got 10pcs lm317 for $1 from TK Electronics , on Ebay and believe it or not those work as original from ST and do not blow up even at 39 Volts input and short-circuit , current limiting works at 1.5 Amp. I build a linear regulator powersupply using a lm431(instead of a 10kohm pot) to drive the LM317 (in my case 6pcs in parallel). It resulted in an extreme stable powersupply.
Did you ever post this project? I would like to see it. But, TH-cam will not let you post the link in the comment section (unless it is a TH-cam address,) so you will have to find some way to code the link description to be something that we can understand.
can i use this one battery drill 12v and 1.5amps
I have a question!! Does the supply outputs a straight DC or a pwm signal?
Can i charge batteries with it
DC, you need a battery charger
I have a transformer rated 30v and 100va.. Will this work for me? How much maximum current I can get?
hi, would, you can get up to 3 Amps.
Kasyan TV great
Ohhhh. Where do I start? Ok. Your polarities are incorrect. Switch the connection to the bridge rectifier as well as the orientation of the capacitor C1 and the circuit will work. Your polarity indication at the output is labelled correctly but according to the take off from the bridge that would be a common positive. Also VT2 needs positive input at the emitter.
Hi, my friend, my transformer and 25 volts to use in this scheme? Or do I have to change some componet?
If your transformer outputs 25 volts the voltage regulator needs to dissipate a lot of heat, the efficiency will drop as well. In other words, you need a bigger cooling block.
Hi
The link's in content is not working?
I am really like your channel!
keep uploading videos!
Matan, from Israel
This is great. How much is the efficiency?
probably not that high because he used a linear voltage regulator.
How can i icrease current limit? Can i build this device with lm317 ?
Excellent video Kasyan! I wish I you could slow down your speech though, it's hard to understand you, no offense though!
Go to settings in the corner of the video and click on Speed 75%. To me he sounds better than a lot of English speaking folks.
Dude,
I want to have 40 v and 0.20 milli amps to 15 Amps variable AC to DC supply.Can u guide ?
how to convert the circuit to have adjustable current up to 3 amp?
and on capacitor after the bridge I have nearly 4 amp an nearly 50 v. are these parameter OK?
you can remove the transistor BD 139 and add BD 131 and you can have it up to 3 amps
? Can i use 2N3055 instead of BD139 to get up to 10 or 5 amp? what about VT2 do i have to change it too
* my transformer can supply up to 10 amps
+Makka Pakka I made the same that goes up to 3 amps at 24 volts maximum. I use MJ2955 instead of TIP42 and a 5 watts zener at 24 volts.
can you send your circuit diagram please?
Can i change tip 42 by lm 317
no, tip 42 is a pnp transistor. lm317 is a regulator
coould this be modified to achieve 10 amps car battery charger?
How to bring up adjustable Voltage and Current ......what component I need to change
Wouldn't it be better if we use the LM 317 voltage regulator
317 will not work here
can i use this circuit in motorcycle for charging battry and 55-60watt headlight bulb? i have Yamaha rx135, we self made it coil and its output is 60v 6a when i accelerate bike on full throttle. we need 12v 5a for headlight and 12v to 14v 1a for charging the battry.
do i need to make some changes in circuit? then what is it?
please reply...... Thank You. :)
I have a transformers 24v and 10a can I use it
Its awesome.
Welldone bro
(y)
can u show how to make a 0-50v 0-3a power supply
I'm back in to the USSR!
Can I use here 12 0 12 transformer ?
>CCCP
That was one old tape deck you got that transformer from lol
Lets NOT Play With Electricity
I made this circuit but not working
I added bd139
And tip42
I replaced vd2 with 1n4007
Plz help me
Voltaj neden 15 voltla sınırlı. 30 volt ayar yapamazmıyız ? Amperi yükseltebilir miyiz ?
It is probably limited to 15 volts because that is either the maximum of that linear voltage converter or the transformer gives 15 volts from the power from the wall.
Teşekkür Ederim. İyi Geceler
No problem, sleep well :D
The current regulation of this circuit really work?
I doubt.
Nice vedio thanx for the same. Sir I want to design a power supply of 12 volt 20 amp current adjusted. Kindly guide me how can I achieve. I shall be highly grateful. Regards
Dein Circuit and PCB Link ist Virenverseucht. Was soll das?
I have a circuit that draws 25 amp at 12 V , how can i Reduce the Amps to 15 but keeping the 12 Volts. Sorry for the idiot question.
If you have a transformer you need to change the secondary winding to a thinner one and also calculate how many turns you need for it
dear friend could you please give me ckt. diagram for 0-12DC VOLTAGE & CURRENT REGULATED POWERSUPPLY USING TRANSFORME OR SMPS ?
I want to buid 0 to 30V and 0 to 20A adjusted power supply w/ current limiter protection , what component must be replace/modified? Oh all was clear from your explaination before, cos I watch this video partially, I'm sorry bro
Lo schema ce un errore ci sono gli ingressi di tensione dopo il ponte di diodi invertito il positivo e collegato con la massa e viceversa
Does it serve to control 1000mw laser?
can i use 24v 1.2A power supply
Is this circuit suitable for 2A??
can you make a metal detected circuit plz?
is this board dot board?
can this circuit support my 30 volts ac 6 amps transformer..?
Frederick Fresnoza yes, it will
anyone pliss help me, i modified this circuit, use adapter dc 18v 2A, no bridge rectifier, 220uF 35v, 1n5402, pot 10k for voltage, pot 5k for current. component burn, and jumper also burn. when i put load at ouput. component burn
We will need to see your circuit diagram..
Thanks! a big help for me. :)
what if i want to reduce the minimum current?
electronics use symmetrical power supply to the circuit
how to make a 0to50v 0to3a power supply please make one🙏🙏
gretz connection is not correct, and c1 capacitor is inverted polarity
The pot R4 is not a commercial value.
I did the assembly, but I can not adjustable current ?!
stefan b. Can you adjust the voltage?
yes
Can i change R1 and R4 with 10k?
Hello,
Can you guide me for limiting the output current to 350mA of a power supply (with output 250vdc, max output 15Amp). Should I simply add 0.22 Ohm 10W (9 Resisters) in Parallel before load?
VERIFIER VOTRE SCHEMA SVP.... ORIENTATION DE POND DE DIODE ET AUTRE
The diode bridge is drawn wrong in the description of an archive, the scheme has corrected it, thanks.
also the polarity of capacitor
can I use a mosfet instead the tip42?
Yup, your circuit at input dc is an error.
Pls tell me ,in which part??
Kartik hegde I mean your schematic is showing a reverse polarity at the bridge diode
Tq bro
You should include a fuse.
How to increase voltage to 32V and Current to 2.5A
Tech Maker change power supply, like a 35 volt@3 Ampere one, find a 32 volt Zener Diode, change transistor to a more suitable one (like TIP42) and reduce value of the 470 ohm resistor(i used 220 ohm 2watt resistor and obtained output current of 4 ampere)
Excellent
What is the value of transformer??
а как увеличить ток до 2-3 а
can we make from LM 317T ?
LM317 can replace the zener diode, but you will still need the transistors to provide the current boost.
ola amigo, deu certo, o tip42 tinha que ser invertido. deu certo vou postar e te mando o link
obrigado, vai me ajudar muito a economizar
adriano costa sabe se serve para controlar laser
adriano costa posta o esquema