Circuit design required

  • Thread starter Pranav Jha
  • Start date
  • #1
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Main Question or Discussion Point

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?
 

Answers and Replies

  • #2
634
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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.
 
  • #3
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haven't worked with servo motors yet. Could you give me the name of sites that would be a good place to start off one's experience with servo motors?
 
  • #4
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  • #5
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Even simpler than a motor, use a solenoid from your old washing-machine to open the lid.

Also look for Passive InfraRed (PIR), like your porch light thing-a-ma-bob, and close range IR sensors to trigger the thing. Once again I recommend sparkfun.com ...
 

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