The tranformer s job is to take the 120v ac voltage from the mains line and step.
Build your own 5v power supply.
It is used to convert mains high voltage ac to low voltage dc and it does it by first converting the mains ac to high voltage dc then switching the high voltage dc to generate the desired voltage.
We have already made a few smps circuits earlier like.
First we need to select a suitable power source i m using a laptop power brick as this is capable of giving me 16 5v and has a power rating of 65w.
Check the water level in the cells often and replenish as needed with distilled water.
If not then tell.
It is used to convert mains high voltage ac to low voltage dc and it does it by first converting the mains ac to high voltage dc then switching.
Add a 5 1 v zener diode we used a 1n4733a in series with a resistor r zener we used a 68 ω and 680 ω resistor in series.
But having a 3 prong plug is better because ground provides better against possible electric fires.
Please tell required spec of capacitors and circuit.
A switch mode power supply smps is an indispensable part of any electronic design.
Add a zener diode and a resistor to your circuit to create a 5v power source and stabilize the voltage even more.
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To build a dc power supply purchase a 3 prong ac plug.
Easily buildable on breadboard or stripboard.
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Dual rail variable supply both positive and negative voltages multiple fixed power outputs 3 3v 5v powered via batteries or wall wart.
It can also work with a two prong ac plug.
Build your own 5v 1a adjustable smps using a dead computer atx power supply power.
Make 5v 3a dc power supply.
You could use any other power brick just make sure the brick is able to supply the voltages what your project needs.
By debashis das aug 18 2020 0.
Transformer after the ac plug we need a step down transformer.
A regulated 12 volt power supply can not fully charge a discharged 12 volt battery but it makes a good float charger if the output voltage is correct again 13 5 13 8 volts for a 12 volt system.
I want to make 5v dc supply so that i can run 3 dc motors in parallel having spec 5v each and max currrent rating 900ma but i have transformer of 3amp step down transformer 220v to 12v to run lm7805 ic whose max load current is 1a.
There are more efficient and complex power supplies in the world.
But if you make a power.
There are easier ways to get a simple power supply like this one re using a wall wart for instance.