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.
Based on Maxim documentation, this circuit can control a motor using a MAX295 class D audio...
This circuit was obtained from an 80s factory manual. The integrated circuits used are uncommon...
Found in documentation from the 1980s, this circuit is used for resistive loads (incandescent...