[sdiy] Plug in-breadboard power supplies, non-CV simple audio signal gens, and more!

[Paul Perry]

http://www.aronnelson.com/gallery/main.php/v/STMs-Circuit-Ideas/Quick+and+Dirty+Audio+Oscillator.PNG.html

for a simple two transistor 'near enough' sine oscillator (fixed frequency). 
Runs on 9v battery. Very cheap.

paul perry Melb Australia