Hi , I make this to work fine no problem running 5 A on 30 v , but for shortening output one thing my stabilizer give 5A on max voltage if amper pot and voltage pot are zero then no problem for shortening output .....so circuit work like that how much u give Amperage on output in shortening give that Amps .....also in this circuit I use 2.7 v zener and 20k pot and 220k pot for adjusting but still wokring perfect
Hoy, 11/10/2024 he armado el circuito, lo instalé en una fuente ALAN K75 reemplazando la electrónica original, ya que suministraba 13.8v , la placa la hice de 68mm x 49mm , las resistencias de 10k, 8K2 y 3K3 coloqué SMD, los preset de 250k y 25k los reemplace por resistencia de 22k, utilicé 2 2N3055h originales (de Alan k75) yyyyyy, FUNCIONA PERFECTO, el transformador es de 17+17, no utilicé punto medio, puse puente de diodos 15A y 1 capacitor 10.000uF x 63v. El circuito es excelente, único detalles, a mí gusto, la distancia de los pines de los BC457 y BC557 deben ser más amplio (5.5mm entre C y E) pero todo muy bueno. Con las R de 22k (reemplazo de 250k y 25k preset) entrega 40v Max y 8 A Max. La placa se alimenta con 45.7v SIN PROBLEMA.
I've built 3 of this - simple, but set output voltage 3Volt and connect a load (or shortcut) and set (or limit) output current to 5Amps and wait till it burns....
this is a linear p/s. if it goes to 35V then you need to have an input supply of 40V when you have 5 Amp load. with 40 Vinput and 17V out there is 5*(40-17V)= 115 Watts in the 2N3055 Transistor. Even with 3 Amps out the dissipation in the 2N3055 is 70Watts. Needs a BIG heatsink. Why did you not make it a switcher?
Hi I did the circuit but the volts and amps setting do not work. I've done the printing and all the elements are intact but somehow couldn't figure out what the problem might be.(Video 04:28 The transistor is plugged in reverse while I am normal)
5 ампер эти транзисторы выдерживают только короткое время, и падение напряжения 0.8 вольт тоже очень много. очень хорошие результаты я получил на лм 723 и 5 транзисторов 2н3055. падение напряжения даёт 0,1 волт при 5 ампер.
Great work. Thanks. Can you make a video for selecting different secondary winding tapping voltages with relay as you change output voltage? As you said in your first video, the transistors heat up quite a lot at low differential voltage. I tried with comparators and it switches the relay, but the problem is, that the output voltage jumps much higher than desired as the relay function and require re adjusting the pot to come to the desired lower voltage. Your circuit is working great and I am using it as my primary bench power supply. Thanks man..
Hello, I am unable to get 100k for p2 current adjustment, is it possible to use 10k? Also, not able to access the archive you have linked, it does not open to get pcb design.... Thank you...
Hi, In schematics you have trimmer potentiometers of 25k and 250k, but in the video potentiometers have values of 104 (100k) and 203 (20k). What is correct? Video or schematic?
Very good video ,can I add more power transistors to increase output current & voltage? I guess I need to use a more powerful pnp steering transistor than bd140 ,maybe bd912?
It has a maximum current setting. If you follow the video they give the method of setting it (basically short the output with a current meter and adjust the proper variable resistor). I'm not sure by what you mean by "feeder".
What is the function of onboard variable resistors( blue ones)?? Can i use general variable resistors instead of those?? I think you saved a lot of my money ... Thank you very much
Akash Banerjee,the blue color trimmer resistor is a multi-turn trimmer resistor. it is use to set the current limit of the power supply. And yes you can use ordinary trimmer resistor in placed of that.
Hi'gak Iya thank you for responding, i have used those blue multi turn variable resistors but aren't they of low value can i replace them with 1 meg??? Or i will need 100k smd VR s? I should keep the voltage divider ratio same!! Isn't it??
Akash Banerjee you can buy multiturn trimmer resistor in different values from 100 ohms up to mega-ohms.. You can replace those multiturn resistor with the ordinary trimmer resistor,but the adjustment is a little bit tricky,it's not a big deal though in this circuit since it is not that critical.
The maximum power dissipation of either zener is 125mw, so a half watt or greater should work. The maximum voltage is 40 volts (the most the input can handle), so anything greater than 40 volts is fine.
I made the circuit..but the circuit giving only 10volt at output... Something happened wrong..i dont know what might cause it.. Plz tell me how to troubleshoot
trimmer and zener diode can i change to this circuit pls tell me i use 10v zener to 5v and 2.4 volt zenar to 3.3 volt , and also change trimmer all 50k but they are not work perfectly pls how to solve this problem becoze all parts not common.
Nirmal Biswas He has a few more designs on his Russian language channel but I don't know if any are dual polarity. The easiest way to create a dual polarity supply is to just use 2 separate identical supplies. You can also use a single transformer that has 2 separate secondary windings. "Separate" means totally isolated secondary windings. If all you have in a center tapped secondary winding you can find the lead with a looped connection, cut the loop, then terminate the 2 halves separately. I am obviously assuming that the winding with the center tap is a "center" tap. You need to be sure that both halves of the winding have the same output, (some transformers will have one rail that is smaller than the other). This is usually quite clear to see on the circuit the transformer came from. If both halves of the rectifier circuit have the same size diodes and capacitors, both halves of the secondary output are going to be equal. After you have 2 separate secondary windings, you can build 2 separate positive power supplies just like the one shown here in this video. After you build both power supplies, you treat the output and ground terminals of each power supply circuit just like a battery. You can place them in parallel or in series. Let's say for example you have +12 volts from supply "A" and +12 volts on supply "B." If you connect the positive output of supply "A" to the negative output of the supply "B" [GND] "A" (+)[-] "B" (V+) ...you now have a 24 volt supply from [GND] "A" to "B" (V+). If you connect the center point between these two supplies to your load/circuit your supplying power to as the ground terminal for your circuit you will have a dual polarity supply. This setup is great for low current circuits like op amps. It begins to show it's flaws when you start drawing large uneven currents from the different windings. If you want a really stable dual polarity supply, your looking for a dual tracking supply. These are a bit harder to build. I haven't found a circuit I really like for this myself although I have tried a couple that didn't work well at all. My favorite solution has been to modify the output of a HP laptop/printer power supply. Most of the old ones from the late '90's and early 2000's were dual polarity. They are basic single feedback loop switch mode power supplies with a center tapped secondary. You can modify the resistor voltage divider for the secondary TL431 voltage reference by adding a potentiometer in place of one of the divider resistors. It is the same process I showed in an older video on my channel. By modifying an HP power supply like this you will have an adjustable dual polarity supply that can output from around +/-9 volts to +/-18 volts. I have modified a few of these. They work well for basic op amp and audio amplifier testing. Be sure you fully understand the risks involved with such a potentially deadly circuit before attempting anything like this. Assume every capacitor that has ever or might have been connected to power is fully charged, that every mistake will kill you, check everything with a meter twice, and never leave a hacked or modified circuit unattended unless you have a degree in electrical engineering. That's just my $0.002 -Jake
I've used 2sc5200 transistor, which alone handles 5 amps, though one problem still persists, When you connect a huge load at the output and then turn the power supply on, the current clamps to 1 amps irrespective of the settings, untill you remove the load. I'm eagerly waiting for your reply!
@@ahmadsaki9625 I didn't design a proper PCB for it, I just used a perf board at that time. The error is probably due to the internal resistance of the transformer which prevents the 10,000uF capacitor to charge up before connecting to the load, a relay that connects after a delay after the capacitor charges up will work fine I hope. Thank you for the response.
@@ahmadsaki9625 Simple, just follow their schematic, they have the most proper layout, just remember to keep the board away from the transformer, to reduce the noise at the output, connect a 220uF capacitor at the output terminal and a 470Ohm 1W resistor to keep the output stable, that's it.
![How to calculate an electromagnet of any power. All about electromagnets. [Education]](http://i.ytimg.com/vi/9OiFWaFA_8k/mqdefault.jpg)
![How to calculate an electromagnet of any power. All about electromagnets. [Education]](/img/tr.png)
Change D3 with TL431 will provide more stable output voltage.
Greetings from Indonesia
How would you incorporate the TL431 in the circuit?
Can you send me a pcb map? ibles bosuok
Hi , I make this to work fine no problem running 5 A on 30 v , but for shortening output one thing my stabilizer give 5A on max voltage if amper pot and voltage pot are zero then no problem for shortening output .....so circuit work like that how much u give Amperage on output in shortening give that Amps .....also in this circuit I use 2.7 v zener and 20k pot and 220k pot for adjusting but still wokring perfect
Hoy, 11/10/2024 he armado el circuito, lo instalé en una fuente ALAN K75 reemplazando la electrónica original, ya que suministraba 13.8v , la placa la hice de 68mm x 49mm , las resistencias de 10k, 8K2 y 3K3 coloqué SMD, los preset de 250k y 25k los reemplace por resistencia de 22k, utilicé 2 2N3055h originales (de Alan k75) yyyyyy, FUNCIONA PERFECTO, el transformador es de 17+17, no utilicé punto medio, puse puente de diodos 15A y 1 capacitor 10.000uF x 63v. El circuito es excelente, único detalles, a mí gusto, la distancia de los pines de los BC457 y BC557 deben ser más amplio (5.5mm entre C y E) pero todo muy bueno.
Con las R de 22k (reemplazo de 250k y 25k preset) entrega 40v Max y 8 A Max. La placa se alimenta con 45.7v SIN PROBLEMA.
I've built 3 of this - simple, but set output voltage 3Volt and connect a load (or shortcut) and set (or limit) output current to 5Amps and wait till it burns....
you are just reading this but I do so enjoy your voice.. it is soothing to me so I listen.. What else do you narrate?
2.4v Zener Diode is not available.. can i use 3.3v zener Diode ?
Very nice and stable power supply....
Nice vdo but I think u forgotten to explain the function of. 250k and 10k potentiometers
Is they set final Iout 5.60A and Vout 35v and please reply
250k pot (trimmer) sets the maximum output current. 10k pot is the voltage regulator
this is a linear p/s. if it goes to 35V then you need to have an input supply of 40V when you have 5 Amp load. with 40 Vinput and 17V out there is 5*(40-17V)= 115 Watts in the 2N3055 Transistor. Even with 3 Amps out the dissipation in the 2N3055 is 70Watts. Needs a BIG heatsink. Why did you not make it a switcher?
That's a fine design for such a low BOM cost.
Hello, this is really a great scheme. Would it be possible to somehow make an indication of the current limit in this circuit?
Aikapaljon komponetteja ! Nykyisin saadaan tehoja IC piireillä ja vähemmillä osilla . Onhan se myös hekpommin rakennttavissa
How do I order the pcb described in this video, I mean a 0-30 volt 0-5 amp power supply
Hi, sir what is the ideal setting of the trimmer p2 ,p3, p4? to achieve the 0-35v and 0-5amp?
thank you!
Hi I did the circuit but the volts and amps setting do not work. I've done the printing and all the elements are intact but somehow couldn't figure out what the problem might be.(Video 04:28 The transistor is plugged in reverse while I am normal)
good afternoon I would like to know what function the 250k potentiometers have and the 25k potentiometer thanks
Very very help full video thank u can u tell me how to down load the circuit diagram
Really awesome work, man. Amazing power supply! 😊
5 ампер эти транзисторы выдерживают только короткое время, и падение напряжения 0.8 вольт тоже очень много. очень хорошие результаты я получил на лм 723 и 5 транзисторов 2н3055. падение напряжения даёт 0,1 волт при 5 ампер.
How do I order the pcb described in this video, I mean a 0-35volt 0-5 amp no' 16042018 from Aka Kasyan power supply ?????????????????????
I have a school project where I need to step up from 7V to 32V 5A. Any recommendations?
Hi, can I short-ciruit The leads at the out to adjust my desired value of curren?
Sir it is showing no files in ARCHIVE download.. empty .zip folder
Hi sir
I need schematic diagram and PCB layout with parts details.
Please
Love these videos! Thank you so much!
Why using resistor in output...??
Iss circuit per fan ki jarurat hai kya
What components I must change in order to use with an input voltage of 65 V DC? Is it possible?. Is necessary to make other changes?. Thanks.
Great work. Thanks. Can you make a video for selecting different secondary winding tapping voltages with relay as you change output voltage? As you said in your first video, the transistors heat up quite a lot at low differential voltage. I tried with comparators and it switches the relay, but the problem is, that the output voltage jumps much higher than desired as the relay function and require re adjusting the pot to come to the desired lower voltage. Your circuit is working great and I am using it as my primary bench power supply. Thanks man..
Use large filtering Capacitor at the supply input.
Hello, I am unable to get 100k for p2 current adjustment, is it possible to use 10k? Also, not able to access the archive you have linked, it does not open to get pcb design.... Thank you...
Hello
Is it possible to operate the circuit with a 24 volt transformer. Even at the cost of a correspondingly low output voltage?
Thanks
Madam can you please upload mosfet based dc to dc buck step down conveter.
El esquema por favor gracias
Can i get full explaination of circuit??
Hi, In schematics you have trimmer potentiometers of 25k and 250k, but in the video potentiometers have values of 104 (100k) and 203 (20k). What is correct? Video or schematic?
i love this channel
🤔🤔🤔....
El cirrcuito no funciona en orcad....
Hi Can you show how to add DIGITAL VOLT/AMP METER connections. Iam a hobbyist.
2:03 Thanks AKA Kasyan!! ;)
how does that circuit work? i dont get it, where to search or get information about that?
@@CyberTricksPro see part one. She said that
Great project ! Thank you !
hello the link not work for arhive. nice job
how to get the gerber file ?? if only have schematic ??can you make gerber files if customer only have schematic ?
Very good video ,can I add more power transistors to increase output current & voltage? I guess I need to use a more powerful pnp steering transistor than bd140 ,maybe bd912?
Great project thanks for time and effort. A+
Dear sir, can asist me to build simple but powerful battery desulfator?....thank you
cool. But how can i increase the current to 20A
:) Thanks
Nice, sweet power supply.
no no,i dont mean that, i mean the actual value of that p3 OR THE RESISTANCE VALUE beetwen base terminal of t3 and 10k resistor.
muy bueno gracias saludos desde mexico
Has short-circuit protection ? Did anyone make the feeder?
It has a maximum current setting. If you follow the video they give the method of setting it (basically short the output with a current meter and adjust the proper variable resistor). I'm not sure by what you mean by "feeder".
Please tell me, how to add LED to be on when current limit is active. This works very good.
please make an active low pass filter circuit for subwoofer
plc tell me the value of P3 at this circuit which is the pot that control the upper limit of the out put current .
250k
no no,i dont mean that, i mean the actual value of that p3 OR THE RESISTANCE VALUE beetwen base terminal of t3 and 10k resistor.
What is the function of onboard variable resistors( blue ones)?? Can i use general variable resistors instead of those??
I think you saved a lot of my money ... Thank you very much
Akash Banerjee,the blue color trimmer resistor is a multi-turn trimmer resistor. it is use to set the current limit of the power supply. And yes you can use ordinary trimmer resistor in placed of that.
Hi'gak Iya thank you for responding, i have used those blue multi turn variable resistors but aren't they of low value can i replace them with 1 meg??? Or i will need 100k smd VR s?
I should keep the voltage divider ratio same!! Isn't it??
Akash Banerjee you can buy multiturn trimmer resistor in different values from 100 ohms up to mega-ohms.. You can replace those multiturn resistor with the ordinary trimmer resistor,but the adjustment is a little bit tricky,it's not a big deal though in this circuit since it is not that critical.
Nice project
how much is the watt rating of zener diodes and volt rating of 2.2nf capacitor
The maximum power dissipation of either zener is 125mw, so a half watt or greater should work.
The maximum voltage is 40 volts (the most the input can handle), so anything greater than 40 volts is fine.
¿Hola, hay que regular los potenciometros de precisión?
I made the circuit..but the circuit giving only 10volt at output...
Something happened wrong..i dont know what might cause it..
Plz tell me how to troubleshoot
can i connect 2 of this power suply in seris using 2 isoleted winding on the mains transormer ?
trimmer and zener diode can i change to this circuit pls tell me i use 10v zener to 5v and 2.4 volt zenar to 3.3 volt , and also change trimmer all 50k but they are not work perfectly pls how to solve this problem becoze all parts not common.
Hi. Can I use a 32v 30amp Power Supply to feed this circuit?
halo
thanx for sharing good project am planning to make one .
one question , can use 2N3773 transistors ?if yes how many so as i get total of 10A
I build it and it doesnt work, is anyone know troubleshooting reference for this circuit?
I try to google it, but didnt find anything.
is this circiut regulated at output ?? (when adding load the volt still constant and doesnt decrease )
Yes, only around 0.65v drop due to wire and copper resistance.
@@tunahankaratay1523 bro did you made the circuit. Is it working the same as shown in the video?
Nice circuit can it be scaled up to pass 10 amps by adding 1 or 2 additional 2n3055's
If you find any solution for this then please tell me I am also building same circuit 30v 10amp
Why don't you apply TIP35 for the output transistors?
Greetings from Indonesia
Can i use .27ohm/5w resistor instead of .22ohm/5w
Why do u call mosfet power transistor???
guess what the T in mosfet stands for?
on JLCPCB i upload the fille with name "0-38V 0-5A PCB.lay6" right? but need the Dimensions to accept the pcb? can you tell me the dimensions?
dual supply- + 24 ground PCB board available? Reply thank you
Nirmal Biswas
He has a few more designs on his Russian language channel but I don't know if any are dual polarity. The easiest way to create a dual polarity supply is to just use 2 separate identical supplies.
You can also use a single transformer that has 2 separate secondary windings. "Separate" means totally isolated secondary windings. If all you have in a center tapped secondary winding you can find the lead with a looped connection, cut the loop, then terminate the 2 halves separately. I am obviously assuming that the winding with the center tap is a "center" tap. You need to be sure that both halves of the winding have the same output, (some transformers will have one rail that is smaller than the other). This is usually quite clear to see on the circuit the transformer came from. If both halves of the rectifier circuit have the same size diodes and capacitors, both halves of the secondary output are going to be equal.
After you have 2 separate secondary windings, you can build 2 separate positive power supplies just like the one shown here in this video. After you build both power supplies, you treat the output and ground terminals of each power supply circuit just like a battery. You can place them in parallel or in series.
Let's say for example you have +12 volts from supply "A" and +12 volts on supply "B." If you connect the positive output of supply "A" to the negative output of the supply "B"
[GND] "A" (+)[-] "B" (V+)
...you now have a 24 volt supply from [GND] "A" to "B" (V+). If you connect the center point between these two supplies to your load/circuit your supplying power to as the ground terminal for your circuit you will have a dual polarity supply.
This setup is great for low current circuits like op amps. It begins to show it's flaws when you start drawing large uneven currents from the different windings.
If you want a really stable dual polarity supply, your looking for a dual tracking supply. These are a bit harder to build. I haven't found a circuit I really like for this myself although I have tried a couple that didn't work well at all.
My favorite solution has been to modify the output of a HP laptop/printer power supply. Most of the old ones from the late '90's and early 2000's were dual polarity. They are basic single feedback loop switch mode power supplies with a center tapped secondary. You can modify the resistor voltage divider for the secondary TL431 voltage reference by adding a potentiometer in place of one of the divider resistors. It is the same process I showed in an older video on my channel. By modifying an HP power supply like this you will have an adjustable dual polarity supply that can output from around +/-9 volts to +/-18 volts. I have modified a few of these. They work well for basic op amp and audio amplifier testing.
Be sure you fully understand the risks involved with such a potentially deadly circuit before attempting anything like this. Assume every capacitor that has ever or might have been connected to power is fully charged, that every mistake will kill you, check everything with a meter twice, and never leave a hacked or modified circuit unattended unless you have a degree in electrical engineering.
That's just my $0.002
-Jake
Can you send me a pcb map thank you
Do you have 30A PCB? ?? if you have let me know, , thanks
Request master,BMS for 36volt 15a for 10s
Are eagle files available.
How much does all the components cost you to ship?
Hii. I need power supply 0v to100v ajustabl for led tv thank you
Can you send me a pcb map?
Someone did it????It works???
@PEDRO GIMENO DE OLIVEIRA ur kidding me. Dp thats there bro
Yes . It really works. I test it .
@@manoochehrsadighazar1857
is the stability is good ?
Show diagram...
I was just going to do the “excellent power supply” and i just saw this
Sir can u make dual voltage
How is work without transformer
Hello, thanks for sharing your videos, I have a doubt, whats the dimensions on mm for this PCB ???...Thanks.
excelente , felicitaciones !!!
hi. making a video for a subwoofer pre amp. please
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Поздравляем ваши вклады.
Привет из «Чили».
Circuits or pcb ?
You are aperfect man vary powerfull project 😁
Hi Kasyan, can i use this circuit for 55 volts dc 6 amp power supply?
Diagram pls
Muchas gracias !!!
Nice Job thank you so much
Very good
Thank you
Hiiii! Please, made a project 0 to 30v and 0 to 30a. Please!!! Thanks!!!
can i use smps type of supply?
Yes
How to order the PCB for this power supply ?
good job 👍👍👍
Thanks for sharing 😀👍
I've used 2sc5200 transistor, which alone handles 5 amps, though one problem still persists,
When you connect a huge load at the output and then turn the power supply on, the current clamps to 1 amps irrespective of the settings, untill you remove the load.
I'm eagerly waiting for your reply!
Can you send me a pcb map thank you
Circuit map
@@ahmadsaki9625 I didn't design a proper PCB for it, I just used a perf board at that time. The error is probably due to the internal resistance of the transformer which prevents the 10,000uF capacitor to charge up before connecting to the load, a relay that connects after a delay after the capacitor charges up will work fine I hope. Thank you for the response.
Can you help me make this circuit? Thank you Anindya Mitra
@@ahmadsaki9625 Simple, just follow their schematic, they have the most proper layout, just remember to keep the board away from the transformer, to reduce the noise at the output, connect a 220uF capacitor at the output terminal and a 470Ohm 1W resistor to keep the output stable, that's it.
I do not know how to draw a pcb map. I want you to help me. Thank you
Just draw a pcb map for me
Anindya Mitra
I'm really sad because I spend more than $30 and it doesnt work!I checked 3 times and there are no mistakes😭
you build it and it did not work?
@@AliReza-xl4zw yes but I've got lazy and bought already assembled module so I thin it's better choice than trying second time:)
Don't be sad its challenging to find the mistake
@@SalimAhmad204682 Thank you!You are right but I already made different one and now I have pretty good power supply:-)
@@nikiamz6501 where did you buy the pre assembled one