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Power supply?
Since I was thinking of building a bipolar power supply +12V, -12V, using a 12-0-12 transformer and using only diodes and capacitors, which I have successfully built. My problem is how safe can this power supply be? since I am not using any regulators?
Discussions
8 years ago
Just use a computer power supply!
http://www.pcguide.com/ref/power/sup/z_mbconatxmain.gif
Answer 8 years ago
How many Amps does a PSU give off, is it just under 1micro amp?
Answer 8 years ago
No, it supplies around 0.8A at -12 volts.
Answer 4 years ago
Usually more like 18 AMPS!
8 years ago
Not very - there is no current limit, and there is no voltage limit. A capacitor filtered supply is going to show 12 x 1.414 v DC out at low loads too, so your circuits need to withstand nerly 18V potentially.
Steve
Answer 8 years ago
thank you for the information, well is there any way to create such power supply without the help of a regulator?
Answer 8 years ago
You end up making a regulator from discrete parts, like a big fat "series pass" transistor and some other bits.
Unregulated supplies are a royal pain.
Steve
Answer 8 years ago
Do you have any sample circuits that I can some how use as a basis for this?
Answer 8 years ago
Take a look at the Wiki article
http://en.wikipedia.org/wiki/Voltage_regulator
A basic one is illustrated there, towards the end.
Steve