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2016
I suppose all the car owners out there love the luxury of having a remote keyfob to lock and unlock their cars, but periodically, they need their batteries replaced. Imagine my surprise when my Dad said that "the battery doesn't seem to be replaceable" ... when every remote I had met to date had a socket for some odd-ball A21 12v cell or a lithium coin cell.   Thanks to element14 and their prompt order fulfillment, we were on our way with nothing more needed than a soldering iron, desolder ...
As many hobbyists like to experiment with wireless devices, having a good 433.92Mhz transmitter is necessary to optimize the reliability of their systems and their range. While these modules can be finicky to use for data link purposes (and I won't go into that), they are quite simple for replicating remote control signals to control wireless switches, etc. To improve range and reliability, users often recommend buying a particular sort of module or increasing the input voltage I wanted to find ...