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I loved amusement arcades when I was a kid, so it made sense that when I started my apprenticeship and had money to buy components I built a small slot machine. It was based on CMOS logic chips and had proper payout functionality.
I can remember building this at the family table, which was not ideal since I kept having to move all the stuff at meal times.
Please excuse the less than ideal visual and audio. I'm filming where I can at the moment.
If you enjoy these videos you can help support the channel with a dollar for coffee, cookies and random gadgets for disassembly at:-
http://www.bigclive.com/coffee.htm
This also keeps the channel independent of YouTube's advertising algorithms allowing it to be a bit more dangerous and naughty.