120v ac to 4.5v dc without transformer power supply

236

04:47:48

Solid state transformer power supply circuit, it's more efficient than coil transformers. It has a reversible input. 

published 12 years ago

gijimodo

12 years ago

Why 3 zener diodes?

gijimodo

12 years ago

In parallel.

Voltransistor

12 years ago

So it's safe. If one of the zener got loose, you will still have some so you don't get shocked. Lol.

Lucan01

9 years ago

Thanks been looking for this.

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