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Roboces's Instructable
[02] Contactless IR Arduino Tachometer
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![[02] Contactless IR Arduino Tachometer](/proxy/?url=https://content.instructables.com/FP5/CV37/LXHK3NL7/FP5CV37LXHK3NL7.jpg?auto=webp&crop=1.2%3A1&frame=1&width=600)