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Tachometer made from a bicycle speedometer (cyclocomputer)

Step 2Set this thing up!

Set this thing up!

Program the cyclocomputer by entering 268mm for the wheel circumference, and make sure that it reads speed in miles per hour.

Mount your magnet on the spinning part.
Mount your speed sensor near its spinning path - no more than 1/2 inch away.

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Author:josie