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Topic: Short range sensor (Read 375 times) previous topic - next topic

I want to count car miniatures passing in a narrow path ( 5 to 10 cm).
What kind of sensor could i use in this situations?
Learning from scratch, on my own ...


Infra Red (IR) , here just an example: http://www.adafruit.com/products/466
If you can mount LED behind the object and Photodiode on the other side,  than you may use cheap version of light-beam breaker

Learning from scratch, on my own ...

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