2022-11-15 (Tu) PoweredInlineSkatesRev2 Rotation sensors

I still need to finish coding the calibration routine, but I wanted to look at the hardware. I dug out a reed switch module, a hall effect module, and some bare reed switches. The module wasn't necessary for the reed switch, which is a discrete input, but it provided a light, which was helpful for testing. The hall effect module was convenient because it lit an LED whenever the field strength exceeded a value I set with the onboard potentiometer.

I used reed switches before, and they have a peculiar trait where they lose connection when they're in the middle of a magnet's field. I haven't researched this, but I suspect it is a phenomenon where the internal reeds become identically magnetized and repel each other. I tested each module around the rim motor's rim, and I could sense several magnets pass during each rotation.
The light on the right is the digital signal indicator

I ran my calibration program while connected to each module, and data flew by in the graphing window. I suspect I captured motor rotations faster than I could transmit the data, even though the Arduino Micro has a native USB and a high baud rate. The red lines on the graph filled the window in less than five seconds.
So much data

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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