7 bit absolute encoder wheel
thingiverse
If you need to determine the position of a shaft, this encoder delivers exactly what you're looking for. To get it up and running, simply line up a row of surface-mount LEDs on one side with phototransistors on the other. The output is in binary format, ranging from 0 to 127. The outer row of holes serves as the 'clock', meaning the data becomes valid only when light shines through one of these specific holes. You can decode this wheel either by using a microcontroller or simply an 8-bit latch. I specifically designed this encoder to provide valuable feedback to a servomotor controlling a tracking antenna. To bring your project to life, you'll need a high-quality printer.
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