This circuit is from Motorola's Linear Databook from 1990. The integrated circuit and transistors are uncommon, but the circuit can be assembled with equivalents.
We found this circuit in an American documentation from the 90s. Through an LED it indicates the...
Suggested by General Electric in a 1970 document, this circuit uses a LASCR, or SCR fired by...
This circuit is intended to monitor the flame of gas heating systems that must always have a small...