SCR mechanical drive (CB6572E)

This contact or reed switch actuation was found in a 1964 Electronic Design. The circuit can be used with sensors and the triac is load dependent.

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CA3140 window comparator (CB9461E)
Found in Radio Electronics this circuit has its action determined by resistor R1. The circuit does...
Flip Flop Neon (CB23610E)
This is a basic flip flop circuit with neon lights. We found it in a Radio Electronics magazine from...
Clamp-on ammeter (CB24814E)
The circuit in the figure uses hall sensors to obtain the current measurement through the magnetic...