120v AC to 15v DC LOW Noise High Efficiency PSU

333

06:04:04

So a pretty great design. Simple, and very efficient.
If you want to build this, be sure to use resistors with a wattage rating that match your transformers max output. 
Assuming a 14v 3A Transformer:
Your Amplitude would be 20v(since the app doesn't compensate for RMS I have set up the transformer with a 20v supply.

If each resistor is 2W that gives you 24w of dissipation and 60ohms of source resistance.

At 60ohms of source resistance, your output will sit at around 15-15.8v with a max source current of about 330ma.

The point at which the voltmeter is connected would be your output.

published 6 years ago

hurz

6 years ago

burning the power at resistors is good for a bad efficiency. How can a App compensate to RMS. Your input peak voltage is just wrong, you have to set it for 120VAC which is rms in peak voltage, this is what the AC source can be comfigured. Vpeak = Vrms * √2 = 120VAC * 1.414 = 170Vpeak

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