Affordable variable bench power supply - with external power source
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- Опубликовано: 1 окт 2024
- Hello guys!
I wanted to build a cheap... I mean affordable variable power supply.
To make it really... cheap, I plan to use an external power source, something any of us have around the house. Let's see how this goes.
A big THANK YOU to all my patrons, especially to: Max Rice and Anthony Ortenzi.
If you are a nice lad and want to donate to me on Paypal, here you go: melcumlk@gmail.com
My Patreon campaign: / sorindiy
My Facebook page: / sorindiy
My Instagram: / sorin.diy
Schematics:
power supply schematic: i.imgur.com/3C...
Potentiometers schematic: i.imgur.com/fu...
PD trigger module + DC jack schematic: i.imgur.com/In...
Components list:
80W buck/boost converter: s.click.aliexp...
Volt/ammeter 4 digit: s.click.aliexp...
Potentiometers 1K+100K: s.click.aliexp...
Binding posts: s.click.aliexp...
Potentiometer knobs 6.35mm: s.click.aliexp...
Potentiometer knobs 6mm: s.click.aliexp...
PD trigger module (a): s.click.aliexp...
PD trigger module (b): s.click.aliexp...
5.5mm power jack (2.1/2.5mm): s.click.aliexp...
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Now bro is owning the whole industry of variable power supply 😂
And UPS
How many DIY power supplies do you want?
Sorin: Yes
Nice power supply. And by the way, the cat's very cute 😍.
I used an old canon printer psu as a variable power supply for my projects. Can go as low as 4.6 volts to 25 volts with a max amp value of i think 3amps before overcurrent protection kicks in. I only took the sensing transistor out and replaced it with a 100k potentiometer so i can manually adjust the voltage, worked really well.
Im planning to transfer it to a better case, more specific, a computer psu. And i recently got another epson printer psu that has 45v 3a max output. Recently tested it amd it gene fron 2.2 volts to ofcourse 45v, way better minimum value than my canon printer. Might put two of em tgether as separate outputs in a single case.
0:19 about the main components on the table, i don't see in the video where do you use in the project the 😺 cat🐈?
That''s the quality assurance inspector!
That electric box has a nice feature, in the compartment on top, you can store some cables with banana jacks.
Awesome Sorin, thank you for sharing your projects with us 😊
Dear .. i suggest something ... Use powersupply old type with iron core transformer
Yeah, 60 bucks only for the multiturn pots...loooool
the volt amp meter is not accurate, i have one of this even it adjustable still not accurate. maybe you can make a video to accurate the volt amp meter?
Hi. Great video. Im gona buid one now. I have question about potenciometer. One is 1k ohm and other is 100k ohm. Can I use two multiturn potentiometer of 10 k ohm value. Please respond. Thank you. I have a xl4016 module.
If you replace the potentiometers, they must have the same value with the original ones.
but I mean how many kohm can I put the potentiometers, the source is 90W, 19V 4.5A
you need to replace the potentiometers exactly like in the schematic.
Hi, could I put a 90w laptop charger? Would you be so kind as to reply?
yes
Great Project as always!!
I wish you presented a little bit the module used, and remplacing the potentiometer for the current settings is not that helping. With those chinese module, the current setting is very sensible, a little turn of the knob and gone to much. Any idea to make it behave a little bit as the voltage potentiometer. Even with those blue multiturn turn pot is not that great.
You should make a video to present PSU modules, you got a great collection of PS and experiance with them, also teach how to set max current on them without load, and tips of course.
Thx
Thanks for the idea, I will explain more about the modules in future videos.
Why is my boostbuck converter won't turns to zero it's stuck on 12.1v the maximum out voltage is 65v.
what converter did you use? post the link.
How much power supplies does he own?
Hey, *everything* needs a power supply...
could you please do some projects or DIY using transformers from computer UPS ?.... I have seen many videos of spot welding using this.
I used the smae module to update mmy Lab Power Supply. But output voltage is never fixed, it is always fluctuating. You pointed about the delay when decreasing voltage without load, and I added a 3.3K resistor and indeed now is decreasing faster. Unfortunatly it never set on fixed voltage, lets say 6,6243 then 6,6185 then 6,6347 then 6,6295V. It do not say at fixed voltage, even if I wait more than 1 min after leaving the knob. Any idea please.
There may be a problem with the voltage potentiometer, try to change the potentiometer.
@@Sorin_DIY yeah that is what I also thought about, the potentiometer. I ordered another one to see.
Please put the Arabic translation so we can benefit from the video. Thank you."
can/could you make an 12v to 220v ups which charges its own battery ?
is it possible to use this power supply at 35 volts and 8.5 amps? thx in advance
No. It's limited to the rated power of the charger/power source.
I am using old computer power supply as a case for my DIY bench supply 🙂 It has more advantages
Is the input 20v
Sir please make video on dual output ups 9v and 12v for router
Jak zawsze piękna robota, skorzystam z projektu👍. Pozdrowienia i 1 l. mleka dla najlepszego pomocnika❤
Hello, would you be so kind as to tell me what kind of resistance you put at minute, 2:54 and how much power that resistance is?
Hi. you can use a 3.3kohm or 4.7kohm resistor, 1W minimum. if you plan to use the power supply with a load connected for a long time (for example to charge a battery) I suggest you use a 3W resistor.
@@Sorin_DIY
Hello, good afternoon from Spain, could you tell me which potentiometers to use for a computer source, 19v 4.5A? Thank you
@@Sorin_DIY but I mean how many K can I put the potentiometers, the source is 90W, 19V 4.5A
It would be nice if it has it's own power source for portability, especially if there's no power outlet available. nice video and thanks
I enjoyed your video, but you did not explain what a millimeter is.
Sir please reply to my question❤ can I charge my 6000mah battery with 0.300 mili amps current? Is there any issue to charge battery with lower current?
You probably mean 0.3A (not 0.3mA). yes you can charge it, but the current is very low and it will take a lot of time.
🤪 *Promo SM*
If wires, or any other parts are missing.....check the cat....
Brilliant idea and turns out looking and functioning very good 👍 Thanks
Ok
At this point Sorin owns every Modules from amazon or PSU or VPS
Superb video as always. Cheap power supply made from easy to buy components
That's a nice box for 3 dollars
A remark from the series: "Things you can say about electronics but not to your girlfriend" 😆
If I was going to build a similar one, I would need to source another volt/amp meter. All that type, I've purchased in the past have absolutely terrible accuracy. Some can't even adjust to within 0.5V/0.5A, as the potentiometers reach their stops. Zero faith, in that type, Sorin.
Hi. In recent years I have bought several types of panel volt/ammeters. this type is the most accurate (at this price) and it has 4 digits. I also buy several volt/ammeters at a time and test them with a multimeter. some of them need to be adjusted with the small potentiometers. but I also received some bad ones...
Great video! I would add a fan to the step up converter and I would also put thermal paste on its transistors because sometimes it doesn't even come with it.
Good job as usual, nice result. Scratches to your cat! 😸
satisfying symmetry! I-Robot, or Wall-E? Good reuse of old laptop batteries. I think there is room to add some cells for a rechargeable system. Why Jaws?
Wall-E is cuter. Jaws because the beach season is over.
In my projects I usually need very low voltage and amps--below the minimum settings on PSUs. It would be nice to see a video on how to make a power supply capable of fine calibration in the 0.1V-1.5V range.
Hi. Most DC converters have the lowest voltage at about 0.9V. You need a circuit board designed for a variable power supply, like this kit: s.click.aliexpress.com/e/_DEvDpXh
I haven't tried it yet, I've already made quite a few power supply videos this year :) maybe next year I will test it.
You also need a better volt/ammeter. These cheap ones are good for their price, but not very accurate at lower values.
Sometimes it is handy to measure the voltage at the load instead of at the power supply output terminal. Simply put binding posts on the voltmeter leads and use an external jumper to connect to the power output terminals most of the time, and remove that jumper and use leads when you want to measure the voltage at the load.
....Very good sorin i am proud of you keep going bro....
What is the input voltage?
it depends on your charger and the fast charge trigger module. In this video is set 20V.
Can you tell me the size of these box
14x14x10 cm
How much current it can handle?
The maximum output current of the converter is 8.5A. But it also depend on the maximum power of your charger/power source.
Hi any cuircit diagram
Hi, the schematics are in the video description.
does the buck converter make the output linear or is it still a switching power supply
it's a switching power supply.
nah bro that box looks sick af
I like your videos man. Keep pumping them up
what an awesome and unique project, love it!
Thanks for the nice box recommendation
perfect :) thanks
No cat, no project!!!
Yuhuuu
Fain proiect , bravo Sorin ! 💪
nice one :)
Are u Russian moi tovarish Sorin ?
He is Romanian
yeah i could build one of these and i have all the things i need to build this but i dont have a case or potentionometers and i dont have money and never will so its sitting on the back burner until i get a job or money one day lol but yeah thanks for making this video so i know how to hook everything up wright lol man ive been wanting to make one of these for like 8 years now dang it lol
Very good
Salut Sorin, ai fost vrodata in Thassos in vacanza?
Salut, da.
stupid question here, what will you use it for?
You must be new to electronics or something because these power supplies are one the most important tools when it comes to electronics
@@Comrade_YG yep, i am new, i only watch videos, i don't build stuff
to power any circuit, test components, charge batteries, measure current consumption and other things...
lol yeah i have one of these and i want to turn it into one of these power supplies but im poor and cant afford the potentionmeters lol or the case lol but what ever i bought this power supply years ago lol i hate being poor
well brother ill see you in the next one keep on keepin on