Is there a circuit that can control a switch with an on & off pattern of light hitting a LDR?
LDR can make good switches, but can a switch be made based on a pre-set on & off pattern? For example, If the light going to the LDR is disrupted (say 10 times), then and only then is the switch activated.
- PhilomelLv 76 years agoBest Answer
Yes, If you let the LDR (photocell) drive a counter which counts pulses and when "Your' count happens it activates a relay turning on/off your load.