This circuit was found in an Electronic Design. It makes use of a relaxation oscillator to trigger an SCR and two relays. The circuit operates at frequencies of 12 to 180 cycles per minute.
In fact, what this circuit does is work the two channels of a stereo system producing two...
In this circuit found in the December 1972 Radio Electronics magazine. R can be from 1k to 22k,...
This stereo preamp uses only two germanium transistors. The circuit was found in old documentation using...