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How would I go about building a radio-wave remote control?
I've been thinking about this over the last few months. The parking lot to my apartment complex is protected by a large fence and a gate that is controlled by a remote control. The ones they give us are mostly worthless, usually you have to get outside of the car and stand three feet away just to get the receiver to notice that you've done anything.
But I digress. Long story short, it raised my interest in just how you would go about building a remote that could send messages on a frequency. Could anyone link me to some type of guide?
Don't talk about illegal uses of remote technology in this thread. Thanks.