We found this circuit in the 1983 Radio Electronics Special projects magazine. The components are common, and the circuit drives a relay. The power supply must be isolated.
This triac control shield uses an opto-diac to control a triac. The circuit is optimized for the...
This circuit is from old documentation. It shows how to implement the voltage adjustments of an...
We found this dynamic tester for transistors with variable collector current in a publication in...