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I recently needed a quick device to count pulses and measure distance/rotation and I thought it worth documenting in case others have similar requirements.   If you’re building something mechanical (e.g. a robot) then this could become a standard part of your toolkit – it will allow you to see exactly how many degrees your servo turned, or how far the motor travelled. I used a FRDM-KL46Z board because it is low cost ($15) and has everything on-board including the LCD display. S ...

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