Turn any fixed voltage adapter to variable voltage output (3v

Turn any fixed voltage adapter to variable voltage output (3v - 20v)

Рет қаралды 52,854

Жыл бұрын

Modify 12V Adapter to Variable Voltage Power Supply
How To Convert Laptop Charger To Variable Power Supply
Turm mobile charger to variable output
Turn your old 12V charger into adjustable 3V to 20V power supply
12V SMPS to Variable Lab Bench Power Supply
Turns any fixed voltage adapter into variable voltage output in the presence of a 431
Adjustable variable power supply
smps to variable output
smps variable power supply
how to make variable power supply using smps
variable smps power supply circuit
SUBSCRIBE: / @tricksofali
Components :
10k ohm potentiometer x1
DC voltmeter x1
35v 1000uf capacitor x2
35v 47uf capacitor
#diy #variablepowersupply #howto

Пікірлер: 39

@Elarpachuau 5 ай бұрын

If you use TL431 it output current is very low. The output voltage can be set to any value between 2.5 and 36 V with two external resistors. The TL431 and TL432 operate with a wide current range from 1 to 100 mA with a typical dynamic impedance of 0.22

@TricksOfAli 5 ай бұрын

Thanks, but tl431 corrects the feedback voltage in this circuit!

@imnotbeluga007 3 ай бұрын

Yeah, all the TL431 does is to provide a feedback signal for the switching components. If you want to go below 3V, you would need a separate op-amp circuit. And if you're above the rated voltage, expect worse performance because every transformer, be it a ferrite transformer or heavy iron core transformer, drops voltage under load, meaning you can get higher than rated, but unstable, noisy voltage. In theory, current control isn't hard to make, either. Just a simple op-amp circuit that forces the feedback optocoupler on when either voltage or current is higher than needed.

@f1xzor 4 ай бұрын

Cool :D I thought it would be more complicated.

@fayaz125 11 ай бұрын

Thankyou.. Very useful video.. For Technacian...

@frank88ster 22 күн бұрын

If the led is not showing anything, does it means it's damaged?

@FixitEasyDIY 8 ай бұрын

Very good 💯

@TricksOfAli 8 ай бұрын

tanx🙏

@handymanssecrets Жыл бұрын

good job

@TricksOfAli Жыл бұрын

🙏

@user-eb3ir5pe7r Жыл бұрын

Thank you very interesting video. But the connection of the 3 potentiometer wires is not clear on the electronic card. Please specify this connection in particular where are the extreme wires of the potentiometer connected? Thank you very much for answering my question bécasse i will make an adapter like this.

@roshanjayasinghe4505 Жыл бұрын

Can use as phone charger

@cyberbeast1789 9 ай бұрын

is it safe to run 12v dc fan on 15 or 16 v power supply?

@TricksOfAli 8 ай бұрын

yes

@cyberbeast1789 9 ай бұрын

can this be done on laptop charger also?

@TricksOfAli 8 ай бұрын

Yes, if TL431 is used in the laptop charger

@katinukanalas 8 ай бұрын

@@TricksOfAlimine doesnt have it

@stephengiacobozzi7785 2 ай бұрын

you use 470 uf in video you say 2 x 1000 uf

@sokdolla 6 ай бұрын

can i follow this to modify my 24v Adapter to adjust 3v to 30v?

@TricksOfAli 6 ай бұрын

yes you can It is applicable to all power supplies controlled by TL431

@sokdolla 6 ай бұрын

@@TricksOfAli if we adjust voltage is it useful for charge battery?

@TricksOfAli 6 ай бұрын

@@sokdolla Yes, just put a diode with a suitable amp in the output

@sokdolla 6 ай бұрын

what number of diode you recommend?@@TricksOfAli

@sokdolla 6 ай бұрын

and can we use 35v 1000uF for those 3 capacitor?@@TricksOfAli

@Wishme85 Жыл бұрын

Assalam u Aleyikum. I have an 18.5 v laptop charger. I have remove its two resistance connected to REFERENCE PIN of TL 431 and attached a 10k Potentiometer . Didn't change any capacitor. Now charger showing 21.5 volts. If u have any whatsapp number, so i can send you the pics of project. It'll be an honour for me if you'll help me. Thank dear.