I'm thinking of building some sort of robotic arm and hand (two separate servos) that gives out a piece of candy when a button is pushed. That's not an issue, I can do it, but I want to think of a way to only give out one candy per kid. For example I don't want them to just keep pushing buttons. I …

Arduino candy dispenser

system October 22, 2012, 12:12am 8

Do I need a specific emitter or will any normal LED trigger any normal photodiode?

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