Found in Motorola documentation from the 90s, this circuit makes use of a triac from that time. The circuit is for the 110 V mains but can be modified for other grid voltages.
Found in a 90s Electronic Design, this circuit can provide a relatively high-power output. The basic...
We found this circuit in Popular Electronics from 1993. The circuit can be assembled with any...
This two-relay circuit gives drive logic that is clear when analyzing the circuit. In the original...