This video is a demonstration of a coin counter I built from TTL logic. You would probably never do this nowadays. I started designing this around 1991 and finally finished getting it working around ~ 2000+ due to lack of a work space, business travel etc. Enjoy the video. If you really, really want the pain of building this you can find the instructable here:
I want to know how you made it, can you make an instructable?
https://www.instructables.com/id/Building-a-TTL-Logic-Coin-counter/ <br>

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More by sncarter:Doggie Dongle - LED light for your dog's collar PICAXE - Controlling the ISD1760 Voice Recorder Module with SPI (Serial Peripheral Interface) PICAXE - Telephone Telemarketing & Robocall Blocker 
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