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Author Topic: RPM Counter / Tachometer  (Read 1155 times)
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I recently tried to use this:
http://arduinoprojects101.com/arduino-rpm-counter-tachometer/
But it doesn't seem to be working.
I used the Infrared Emitter and Detector from Radioshack:
http://www.radioshack.com/product/index.jsp?productId=2049723
would that be an issue?
Any suggestions?
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Edison Member
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The radioshack components are a normal IR led and a normal IR transistor. So that should work.

Are you sure everything is connected as in the picture ?

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Are you sure its emitting light?  You can test this easily with a camera. 
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