hi everyone! for my science project, i want to create a circuit which automatically opens the lid of a dustbin when a person passes by the dustbin. Is there a particular type of circuit that i can use to accomplish this?
What do you mean by particular type of circuit?
The general idea would be something like -
proximity sensor --->Microcontroller--->servo motor driver-->servo motors.
Proximity sensor, like an ultrasonic sensor or infrared sensor etc would sense the person and send a signal to a Micro.
Micro would then drive a servo motor thru a servo drive circuit. The servo motor would open the lid.
You could eliminate the Microcontroller and wire the sensor directly to the servo drive circuit.