How To Make Variable Lab Bench Power Supply
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- Опубликовано: 29 сен 2024
- Buy electronic components: lcsc.com/?from...
Hi friend in this video I have made a variable bench power supply I hope you learn something from this video please like share and subscribe
Components
1x LM723 IC lcsc.com/produ...
2x 2N3055 TRANSISTORS lcsc.com/produ...
1x D313 TRANSISTOR lcsc.com/produ...
4x 10A10 DIODES lcsc.com/produ...
4x 1N4007 DIODES lcsc.com/produ...
1x 100nF CAPACITOR lcsc.com/produ...
1x 10uF CAPACITOR lcsc.com/produ...
1x 100uF CAPACITOR lcsc.com/produ...
1x 1000uF CAPACITOR lcsc.com/produ...
1x 1K VARIABLE RESISTOR lcsc.com/produ...
1x 10K VARIABLE RESISTOR lcsc.com/produ...
1x 470 OHM RESISTOR lcsc.com/produ...
2x 680 OHM RESISTORS lcsc.com/produ...
1x 1K RESISTOR lcsc.com/produ...
1x 2.2K RESISTOR lcsc.com/produ...
1x 4.7 K RESISTOR lcsc.com/produ...
2x 2 PIN TERMINAL BLOCKS lcsc.com/produ...
DIGITAL VOLT AMPARE METER
TRANSFORMER
HEAT SINK
VERO BOARD
JUMPER WIRES
Circuit Diagram:
drive.google.c...
drive.google.c...
My Channels:
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Instagram: / kiyani676
fecebook: / kiyanis-lab-1520512291...
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Наука
You should consider putting a ballast resistor, something like 50 mOhm - 0.5 Ohm on the output (emitter pin) of the 3055 transistors so that they share the current and therefore the heat equally.
A great project Bro! Can I use a 12 + 12 transformer? How many amps? Thank you very much !
This supply will suffer from high voltage drop and poor current limiting since there’s no feedback from the actual output l, but only from the low current path to the output transistors. There are many much better designs out there!
Where I have some problem
Hi, Could we see a modified version of this circuit where its control loop is driven by a microcontroller using PWM for CC CV modes please ?
Can you make a video of how to manufacture thermostats
No
Which software is used?
Sorry for being a negative commenter but I have built power supplies with far fewer components.
of course. It depends on the desired performance level. The simplest power supply is the one with 2 components: a rectifier bridge and an electrolytic capacitor. From here is the beginning. If we don't like the shape of the output voltage, we might add an LM317 for example, a resistor and a potentiometer. If we also want variable current, we add more...
Kiyani my friend, you've goofed with the Schematic or the parts layout mate. On the schematic, you show pin 10 of the LM723 in junction with your 680-ohm resistor and the base of the D313 (which you show in the schematic as a TIP 41) but in your parts layout diagram, you show the LM723 pin 10 isolated. Were you aware of this or did you miss it like most other posters here?
Yeah thats what im saying
I saw that as well. Didn't miss it !! Not sure which is correct.
Hi, i have a variable power supply 0-24 volts…0-1 amp.
I read a lot of comments, and some peoples said, they saw a lot of mistake with your project or missing parts.
I just Want to make sure your diagram is ok , for m’y project, m’y board is broken .
And also your vidéo is not clear about the connection of the power supply.
Can you fix that please, for all the people who wants to do your piece.
Thank you.
yes it is correct and still working fine
@@KiyanisLab Hi, Kyanis, can i use a 2N6124 to replace 2N3055 TRANSISTORS ?
Thank's
There is to high voltage drop when connect load. I think that the pin3 of IC723 should be connected with emiters of output transistors.
I made the same device according to the given instructions but it didn't work as it should. The voltage was not stable after connecting the load, it dropped by 0.5 to 1v depending on the current. After I connected pin3 of the LM723 to the emitters of the output transistors, everything worked perfectly. The voltage was stable both under load and when the input voltage changed.
Hai man
I have some questions please answer them
1) Did you directly connected pin 3 of the LM723 ic to Transistor emitter ?
2) Or have you used any resistor in between pin 3 and emitter of Transistor if yes then what value ?
3) pin 3 needs to be connected to D313 Transistor emitter or 2N3055 Transistor emitter
HI SIR, CAN PLEASE MAKE VIDEO ON WORKING OF UC3842 IC ???
ok bro
Hmm the regulation is not very good. I think your deployment method may have a few issues.
I tried this cct a few times but failed. Wonder why the no. 10 pin of IC LM723 (V out) has no connection to it?
Voltage variation when load is removed, is not expected on a bench PSU. It could damage something else, connected in parallel at the output.
Maybe it is because of the current is more than 6 ampers. and exceeds maximum current which ps can give. if it is the same for all loads it could damage the devices.
Such a simple fix. It should be monitoring the voltage after the transistors, not before them. Transistors are current amplifiers, so the voltage out will depend on current. Whichever pin is the negative feedback on the LM723 shouldn't be connected to the Red but instead the orange output wire.
а огромные пульсации выходного напряжения при 6 амперах тебя не смущают? ахах. смотри, у него конденсатор на 1000 микрофарад всего.
и еще куча всег овключая компенсацию в 0.1 микрофарад
At 10 min 13, layout doesn't show pin 10 connected- that is the LM723 regulated output. You sure this works?
I face a problem with linear power supply, and I see you didn't solve it
The output voltage is not constant and varies according to load
Do you suppose a solution for this?
I also assembled this circuit but not working, I think pin 10 of IC is leftover you have to clarify the circuit.
Well, another one who can't read data sheets or does not do his math homework.
24V 6A with 2 x 2N3055 ... RIP
And that "heat sink" for 100 to 150W? ROTFL
Also: No emitter-resistors on the power transistors. Not using the current limiting ability of the 723 with a shunt. And and and.
All project are ok but Putanshail meter are not control volt and amp
when someone is trying to help me i very seldom criticize them' 'its just ''bad'' manors' ''''''now this guy is very ''smart'' and willing to share his knowledge with us'' just too help us out of the ''goodness'' of his heart''''''''''''and i see people ''criticizing him'''''''that i'snt right'''''''i wouldnt blame him if he never ''spoke'' to us again'''''' 'after all i'snt he just trying too help us'''''''james.
Hi, How much max V does the input support?
Also, a very easy good recipe. I have never seen better than this.. Congratulations.
I uploaded same few years ago , kinda fun how some videos are just forgotten on RUclips. You have one flaw in your diagram, there are no balance resistors between power transistors which will cause that more current going trough one transistor than other, while it should be equal on both transistors. If you are lucky , difference will not be to high so you will not destroy power transistors. But danger exist . Since this is my favorite bench power supply I have to like every single video about it .
share your link
Becarefull to excecute this circuit it is very danger and read all rasioanable comments from the nitizenz
you should consider little bit explaining. Its like take 1kg sugar, 1 liter water mix it up and drink it why don't know?
Hola.
no se a donde va conectado el cable negro del amperimetro.
el cable negro está conectado a tierra
@@KiyanisLab gracias
You showed where to get every part BUT the actual power transformer. To be able to provide 6 amps, means the transformer has to be large enough to provide that current capability and maybe a little more. Also, instead of trying to find a transformer with two secondary outputs, forego the 12 volt output and use a 12 volt regulator after the bridge circuit off the 25 volt output. An LM7812 will provide the meter power with no problem. Just install it after the 25 volt output bridge and filter circuit. Then you can eliminate the (4) 1N4007 diodes and C4 100mfd capacitor as well. Just an idea...
Double rectifier circuit ? 😂😂😂 Waste of money, time and brain cells😂
Hello, why do you have this voltage drop from 12v to 10v when you put the load ? can you avoid that ? thanks
It's not working
КАКТО МАЛОВАТО НАПРЕЖЕНИЯ ДЛЯ ТАКОЙ ВОЗНИ ПАЯТЬ МОЖНО НА КАРТОНЕ
Where is the connection of pin no. 10? The voltage output is pin no. 10 so why it is not connected?
what about the amps, it's also adjustable ?
Regarding transformer you prescribed 12 + 25 v , which type of transformer needed
Bro can I use D1047 or 2SC5200 Transistor instead of 2N3055 ???
I already tried 3 times but the result is nothing
Hi bro i make it but it doesn't show any output what is the reason bro pls reply
Could I have the circuitry map, please? I really appreciate it. Thank you, Indeed.
your project not working
plz help me
This circuit can never deliver below 2 volt unless you turn it off.
Witch application u r using for designing circuit????
I made it as per circuit but out put Volt is not increasing or decreasing by potentio meter but giving only 3.4 Volt only.what is wrong please advise me
You need to connect from pin 10 of ic lm 723 to pole b of tran 2sd313
And why decreas volt when load on
you cant use BJT's like that, with high current you have thermal runaway, one of the transistor will carry the load
with a ballast resistor it should be fine.
@@frosty129Should be?
Try test it with a big load and measure the temperature on each transistor.
@@flemmingchristiansen2462 well, the circuit proposed in the video as it is will have this problem as you mention, but if you put a 0.5 - 1 ohm high power resistor on the emitters of the npn's in parallel, the voltage drop across these so called ballast resistors should in theory help to balance the current between devices equally.
Nie and clear ! May I please ask what are the maximum output voltage and amperes can the circuit produce?
I don't know if he ever answered' 'but its normally around 6 to 8 amps per pass transistor' 'voltage adjustable from 2 to 37 dc volts''''i know its a little late''''but did this help you.......James,, Oklahoma.
Sir get the circuit diagram
Hi, what software do you use for creating that color schematic?
Bhai current ko vari karsakthe hain kya is circuit meain
Why thise circuit has 2 bridge rectifier
one is to power the meter and one for power supply
Several flaws in this project as mentioned by others. You don't say as to what this rated as in Volt and Amperes. All in all I do not recommend this project.
Not complete diagram
Sorry, but this video is a 'fail' for my purposes. I'm learning about circuits, and all I learned here was from commenters who think the circuit is flawed. This is nothing more than an unnecessarily flashy circuit diagram, and a bill of materials. I don't know why you chose your components, or even what they do. For those who do understand the circuit, I can't imagine they learned anything by watching you solder it to some veroboard.
This is bogus. Its basically unregulated power supply. As soon as u removed the load voltage jumped to 15V
Ok thanks but what is all the other bunch of components doing on the factor assembled Linear DC power supply? What is the difference between yours and the factory one?
I see this all the time on here, all these dodgy electrical circuits held together with popsicle sticks and bubble gum with 3 gallons of hot glue.....so someone goes out and buys all the components for the build, and a week later their house is on fire, or best case scenario it just plain falls apart. My grandfather and father always said to me at a young age, "If you are not going to do it right, don't do it all!!!!" And Holy Mother of God, where did that transformer get yanked from Adolf Hitlers time machine?? Good luck man, be careful........
Finally you uploaded it.... 😅😅, thank you so much bhai, as I needed this video the most...
Sir Kay eia power supply cc and cv power supply hai I mean Kaya eis power supply ka dono output terminal short kar ka ampere control kar sakta hu Kaya
Plz sir ans me
I don't know how long ago this was uploaded, but i tried it and it works. How about an explanation of what is actually done by each part instead of just giving us something to copy. That would help me a lot in tryng to understand the circuit and troubleshooting it later if yhe need arises.
i have a transformer with 35vac secondary is it safe?
yes
Waaaw... amazing diagram... 👍👍👍 thanks sir... from Indonesia..
Ya,...sama sama...😂😂😂😂😂😂😂
Ngikutin skema diatas ko ga fungsi ya, entah salahnya dimana
hey, bro what alternative could i used if there is no 12v 0 25 v transformer available?
how can I get this project to 60v and 5amp? My Transformer has windings of 34 volts. Thank you
Instead of using LM723 ic can we use another ic .....?wht ic can place ther......?sir
Hello, does anyone know the name of the program that was used to design the circuit?
Connecting the 2 BJTs in parallel is not quite a good idea, as one of them will always carry more current that the other one although they are one the same heatsink. Anyway, i think that the circuit is pretty good and I really the quality of the video itself. Good job!
you can use current resistors in every emiter 0.1 Ohm 5W is ok
Yeah, but although adding a resistor to the emitter is possible, a 0.1 ohm one is not quite sufficient to keep the currents on the same level while adding higher resistance is making it worse by creating more heat in a high current application.
Sir Kay eia cc cv power supply hai
yes
you forget to show us to connect pin 10 of lm723 to the base of 2sd313 !
Also - while his circuit diagram shows that - his drawing does not. In the drawing - pin #10 has nothing connected ?? It makes me question if the circuit diagram is incorrect !!!
A lot of videos on youtube about 24 to 40volt but not any diagrame for 60 volts why?
Hello my friend. The first schematic have 4 X 10A10 diodes the second 4 X 6A10 diodes
The first schematic have D313 transistor, the second the TIP41.
Why ????
Hello my name is Muhammad Aslam Ashkbar How to I maek a Remot cantrul for toy car to that can work wirles please help me
hi sir .nice very nice. what other amount can be used instead of D313 ??
hey bro what size of vero pcb should i used for this power supply
Which is the simulation software you have used
What is the software name which is use for ckt diagram and presentation.. ???
Are the 12 volts only for powering the voltmeter ammeter?
Hi! How many Volts is your supply? Thank You!
in this video you have not mentioned wattage of resisters you are using which most of technical youtube videos do not mention wattage of resistors used for the projects which is important . please do mention same in your future videos
vijay chavan
Transformer1-12v and transform2- 25v esa alag alag transformer use kar sakte haj kya??
Can work for 15volt???? Or not?
yes it can
Bhai 3A load ke liye 1 3055 transistor se kaam ho jayega na?
No, 3055 can carry around 1.5A current
PCB?
I want to learn about electronics. Any suggestions anyone?
which software is used for circuit presentation.....
Thank you sir for sharing your details about diagram for us
Hi, I don't wanna be rude but, it seems you guide people to how they can wire it. I'm looking the logic behind it could you help me about it? I mean I knew what does clamper circuit or full bridge rectifier doing. But I'm not sure how you choose your resistor for that IC's. I want to be a good electronic designer but it seems puzzle to me. I am looking reasons for every steps. Do you have any suggestion?
For that Study Analog Electronics Circuits, Digital Electronics Circuits, Advanced Electronics circuits.. These 4 Engineering subject can clear your doubts and you can be a good designer. It takes time but yes.
Math, Physics, Chemistry, Thermodynamics of 12th level should be clear to you to start these subjects. It's not difficult but there is no quick way to learn it.
hello friend how much Amper output is A ???
I can't connect voltmeter, please someone help me
Very nice
Can't use 12-0-12 instead of 12v 24v
please you can make a push button power supply
Output voltage is not regulating without load
This project is very nice!
borther can u tell the volt amp of the transformer?
i watched this video in Chinese app. now i don,t know you copied his project or he copied your video..... same diagram same circuit
Hello, how to reduce the voltage drop ? this is annoying to see volts decreasing
What Amp is your Transformer?
thank you sir🥰
why you hv to use 2 bridge rectifiers?
Way too many ads pop up with this guy, not worth the time.
За відео дякую! А от купувати компоненти на lcsc.com невигідно. дуже дорога доставка.
How can I get 35v with this circuit