Basic Latch (CB7981E)

This circuit can be applied to several logics. The circuit is from an Electronics Now from the 90s, using two push-buttons.

Slave flash (CB8700E)
This circuit was found in a Popular Electronics from the 90s. It uses a LASCR which is a photo-SCR...
Voltage controlled oscillator (CB12758E)
This VCO works in the opposite way to the previous circuit, converting continuous voltages into...
Power Failure Alarm (CB6116E)
This circuit, suggested by an Electronics World of 1969, keeps a blinking LED for a while when a...