I have too many little dev boards and breakout boards and other components laying around here, picked up from cheap Hong Kong-based suppliers. I buy them thinking “oh yes, that would be handy” and then never do anything with them.
Today I have used two in one go. Blam! I made this, the Beverage-o-Meter:
One Arduino, called the server (although the wireless boards are just peers with respect to each other), sends changes in the potentiometer’s position to the client (shown above), which rotates a stepper motor in sympathy, as it were, pointing at the beverage
desired. It is probably not that diplomatic a thing to plonk down in front of someone, so before deploying, work out a rota of who gets to hold the control.
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