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Topic: REALLY simple wireless? (Read 8332 times) previous topic - next topic


Look at that, sparkfun is carrying RF receive modules again, just like the ones we referenced 2 pages ago.
Designing & building electrical circuits for over 25 years.  Screw Shield for Mega/Due/Uno,  Bobuino with ATMega1284P, & other '328P & '1284P creations & offerings at  my website.


How do the cheap r/c remotes and garage door openers work?

I happen to know that garage door openers are often used (depending on how you define often) as wireless detonators for explosives, and for good reason. Like you said their cheap which is good but the unique thing about the garage door openers is that it is a encoded message so no stray radio waves will set it off  :smiley-eek: R/C cars I believe use a much simpler protocol because its not so critical. But I would guess that the more expensive the hardware the better the encryption


My garage door opener is really old. Like >20 years old. I will open it at some point, but I noticed that there are two screws in the back... One looks like it holds the remote together, the other could possibly be a tunable cap or inductor...


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