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An Arduino Pro Mini is a small microcontroller derived from the Arduino Uno using the ATmega328. It is unique for its tiny size and the required external FTDI adapter.

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CNY70 from 3.3v instead of 5v?

I would like to use a CNY70 with arduino that is not 5v but 3.3v powered. On the web there most tutorials use 5v and 200 + 10k resistors (e.g. here and here). So as far as I understand for 3.3v I woul …
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