jinyuetek raspberry pi arcade coin slot| Alibaba.com
How to setup coin acceptor on raspberry pi retropie - YouTube
Raspberry Pi Piggy Bank with Coin Sorter - Alex Strandberg - YouTube
CH-926 | jalibu
Overview | Arcade Coin-Op | Adafruit Learning System
Using rasp pi and universal coinslot to monetize your wifi connection. At first I thought this is just for home projects but it turns out this can be a good business opportunity