TECH: Credit Accumulator / Coin accumulator



Has anyone convert their older games from $.25 to $.50

>>From my digital logic knowlege I know you can use SR Gates and Half
Adders to make a Credit Accumulator.
Has anyone done this?
Does anyone have scematics?
The ones happ sells are $150 but thoes have a timer. I just want to
convert my 25 cent games to 50cent or $1. Any ideas?

-Paul

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