Recommended electronics forum

[mudnut]

G,day, all. I was looking for a good electronics site/forum to redo the speedo signal generator I made to redesign my power supply to be properly regulated to whatever voltage I select between 2 and 40 volts DC (max18amps).

So, can anybody recommend anywhere?
These guys seem to know what they're on about:

http://www.instructables.com/id/Modified-Sine-Wave-Signal-Generator

cheers.