50mm Round Coin Slot and IR Sensor Mount
thingiverse
This is a 50mm diameter coin slot and backing plate used for mounting a small IR sensor that detects the insertion of a coin. In production, I pair a shiny chrome slot from Aliexpress with the backing plate and this sensor: https://www.amazon.com/gp/product/B008DG96NU/ref=oh_aui_search_detailpage?ie=UTF8&psc=1 The sensor wiring is tricky and requires 2 resistors. I've used this setup successfully with RPi and Arduino button detection libraries, but it takes some experimentation. Brown wire connects to Ground Yellow wire goes directly to CPU Pin pulled High Red wire connects to a 3.3v source
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