Everything for Electronics
Nuts & Volts Magazine (September 2009)

Bicycle Gear Position Indicator

By Dan Gravatt    View In Digital Edition  

Here’s a couple of simple circuits to tell you what gear your bicycle is in while you’re pedaling down the road. I usually check what gear I am in by looking down at the front and rear gears. I decided I needed a better way after I bought a good road bike with 30 (!) gear combinations (three gears in front and 10 in back).


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GP Bike Indicator