I know, I know—discussing the subject of a relay-based sequence switch in the age of omnipresent microprocessors seems to be a waste of time. After all, relays have been in use for many years. Is it ...

Use an LM1881 sync stripper to trigger a 555 timer set up as a one shot, make the time period longer then one video line (~65uS), and use the output of the 555 to control the relay.

This low current relay circuit is designed to be used in battery operated electronic devices. Its operating current is in micro amperes (µA). This is done by using a bistable relay and adding some ...