Regulating 5 Volt

I want to make a power supply that supplies 5v DC.
I have a 7805 regulator.
I have an AC/DC adaptor that can produce several outputs, it has a switch on it. 4.5 6.5 7.5 9 12v

I think the way you hook up the 7805 is
+Vin to pin one (eg 9 volts)
Grd to pin two
+Vout to pin 3 (this should be 5 volts feeding the project)

What Im not sure of is the size of capacitors used to smooth out the signal. I have seen caps between +Vin and ground (-) and +Vout and ground (-) The value I have is 10uF 25v. but I have also seen other size Caps here. Is the difference based on the input Voltage or something else ?

Regards

Posted by steve Semple on 30/12/2004, at 18:46 GMT