Friday, Jun 04, 2021 at 14:08
Rocket Rod.
Buy a cheap $30 bike computer.
Fit a small magnet to the hub near the brake shoes. Glue it on.
Place magnetic proximity pulse sensor on
home made bracket so sensor detects each revolution of wheel.
Extend sensor wiring so the computer can be fitted inside or outside in safe place, if preferred.
Ensure sufficient battery size to run it all the time and last a couple of years, it does sleep when not used but, long time no see applies.
Can be done by fitting a large, 1.5v or 3v if that is used, dry cell to computer battery contacts.
Set wheel size/circumference in memory of computer.
"Problem solvered" for 1/10th price mentioned.
PS. To fit sensor, you may have to drill a small hole in brake backplate to enter brake area.
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