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Remotely controlled throwies Answered

I'd love to make some throwies that can be remotely controlled. At a minimum I want to turn them on and off, colour and brightness change would be fantastic. 

What's are the options for doing this - what's the cheapest, lightest, smallest way to control them remotely? Some kind of RFID and switch?

Is this going to drastically raise the price from about $1 a piece, or could it be done cheaply?

How many could feasibly be controlled at once?


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8 years ago

IR would be a pretty good method, good to 25 feet or more. Price reductions come with quantities I know, but a 1$ each isn't going to happen.