For those interested and like to tinker, I found that these ultra-cheap IR transmitter/receiver circuit boards

https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1

and these voltage converter boards

https://www.amazon.com/dp/B0758ZTS61...roduct_details

combined together make great speed sensors for controller that need a high/low pulse and have adjustable Pulse Per Revolution settings - and all for less than a couple bucks and who like to tinker.

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