HOW TO – Make a versatile and low cost digital counter

Bikes Fun & Games
HOW TO – Make a versatile and low cost digital counter

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Trebuchet03 writes – “This hack will transform a cheap easily sourced calculator into a versatile counting machine. It can be used as a cheap method to measure distance using a wheel, reed switch and magnet (think bike odometer).”Link.

Clever, it counts by adding +1.

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