2022-11-17 (Th) PoweredInlineSkatesRev2 Motore pully magnet

I planned to use a reed switch to sense motor rotations, but I did another test to ensure it could keep up, and it failed. I placed the device near the motor and ran it at low speed, and the serial data confirmed it was tracking. When I sped up, the readings became erratic, probably due to the switch failing to open between pulses, so I must choose the hall effect module. The module includes a mounting hole and threshold-triggering circuitry, so it is a practical choice.

I replaced the module's header pins with 30 AWG silicone-coated wires long enough to reach the enclosure I would build. I drilled a 2.5 mm hole in the motor pulley and tapped it with 3 mm threads. I mounted a countersunk magnet with an M3 machine screw, but it was closer to the center than I wanted because I couldn't allow the hole to damage the pulley grooves. I had to disassemble my polycarbonate wheel rack to access the pulley.
Countersunk magnet on pulley

I had a chunk of solid nylon to make a suitable platform for mounting the hall effect module, so I drilled and tapped three M3 holes. Two were for connecting to the wheel rack, and the third was for attaching the module. I reassembled everything and ran the wires into my enclosure, where I terminated them on the Arduino's prototyping board.
Arduino wired to skate

The rest of the posts for this project have been arranged by date.
First time here?

Completed projects from year 1
Completed projects from year 2
Completed projects from year 3
Completed projects from year 4
Completed projects from year 5
Completed projects from year 6
Completed projects from year 7
Completed projects from year 8

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