We found this circuit in a 1971 documentation. The circuit can be assembled with more modern transistors such as BC548 for Q1, BC558 for Q2 and BD135 for Q3.
Found in an Electronic Design from the 80s, this circuit uses an unusual component today, the...
The CMOS TLC555 can be gated from external CMOS circuits using the configuration shown here. The...
This circuit was obtained in a Motorola manual from 1978. We can use any triac and the coupler with...