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.
We found this circuit in an 80s Intersil documentation. Modern equivalent operating systems can be...
Although the system is experimental and should not be adopted by the arrival of digital radio, for those...
This circuit with the LM741 operational amplifier can be applied to other operational amplifiers. We...