Kerrowman Posted October 19, 2021 Report Share Posted October 19, 2021 I have built a device that has a spinning rotor that I would like to display its rpm. I have been using a handheld laser device that bounces off a reflective strip on the rotor (see pic). I’m looking for a permanent module attached to the base plate with a small display unit I can mount and with any electronics put on the PCB I’m preparing. Magnetic options are complicated as the rotor has 5 Neo magnets in it so an optical method is preferred. Any ideas? Thanks Quote Link to comment Share on other sites More sharing options...
HarryA Posted October 19, 2021 Report Share Posted October 19, 2021 You can roll your own laser tachometer and mount it however you wish: https://www.youtube.com/watch?v=0UqHNrqmTRU Quote Link to comment Share on other sites More sharing options...
Kerrowman Posted October 19, 2021 Author Report Share Posted October 19, 2021 Thanks. A useful idea but wouldn’t need to house in a case. More a question of how to place all the parts on and around my circuit. Quote Link to comment Share on other sites More sharing options...
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