Here’s your useful and beautiful circuit for the day — [New Pew]’s vibration sensor takes manual control of the flip-flop inside a 555 timer and lights an LED in response. Use it to detect ...

A simple push button circuit that connects the DC rail to the load when pressed once and disconnects it when pressed a second time.

This circuit uses electromechanical relays to retain its state indefinitely, even when power is off. It consumes no power except when triggered from one state to the other.

In this paper, the authors deal with the testable design of conservative logic based sequential circuits by using two test vectors. The conservative logic ...