This conventional relay light detector circuit uses a 741 as a voltage comparator. The sensitivity adjustment is made in R1. The supply voltage depends on the relay used.
This circuit can be used in traffic alarm systems. The relay trips when the light falling on the...
This filter was found in documentation from the 90s. The cutoff frequency is 2900 Hz. Changes can be...
June 2017 - New Honeywell MT MICROSWITCH Series can be ordered from Mouser Electronics for...