I want to build a backup proximity detector like many newer cars have, as a fun useful project. The type that beeps in reverse when something is behind my car; faster beeping means the object is closer. I’m new to electronics and I need help designing the circuit.
I thought of using the PING))) sensors available from Parallax to sense the distance to objects. Any help with the circuit is welcome. It would be preferred to have it auto-activate when in reverse, but I could just as easily flip a switch mounted next to the shifter to activate if it becomes too complex.
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