I want to build a cheap wheel encoder by myself. – Need some help here. I want to build a cheap wheel encoder by myself. Now, my idea was to use a photodiode and a LED. What i don’t know is how to use the output from photodiode to put on a GPIO on my MCU board. Do i need some resistors or something. Aaaa, i need a high level of 5V for my GPIO. I – AV
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