Making a miniFM Transmitter

Making a miniFM Transmitter: I’ve wanted to build an FM transmitter for a while. This looks like it is about as simple as they get.

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There are very few parts and the technique used is extremely simple… you don’t even need to etch a circuit board. What I really want is to make a way to encode data over a narrow band rf transmission. For example, to send a message to a counter circuit in another part of the house every time the refridgerator door opens. :-)
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