We found this multiple thermostat circuit in July 1980 Radio Electronics magazine. It uses opto-triacs for power control and operates on a 117 VAC mains.
Here is another project that is based on an astable multivibrator, in a demonstration of the...
This circuit selects a signal at a frequency determined by the double T. The NPN transistors can...
Found in the November 1999 issue of Electronics Now magazine, this circuit generates a 6.67 Hz...