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2 years ago
A $25 car alarm
I made on of these for my motorcycle years ago. I am at a busy motel and its not easy to see my car. I went to Home Depot nearby and bought this door/window alarm for $25.
The big item gets plugged into a power socket in my motel. That is the receiver. It receives a signal from the middle sized box (the transmitter) when it is separated from the little box, which is a magnet. Move them a half-inch apart sets off a loud chime in the motel room.
For my motorcycle, I had attached the magnet to the handle of a headless toothbrush, set up so that it could swing like a pendulum. When my bike was on its side stand, the pendulum would rest against the transmitter. If someone stood the bike up straight, the pendulum would swing away and trigger the chime. The transmitter and magnet were tucked away, locked in my top box.
I wanted to to something similar for my TR. My best idea I have had is to put something on the driver’s seat that if disturbed, would trigger the chime in my room.
Using one of the cards on top of the TV in my motel I’ve set up the transmitter and magnet on the driver’ seat. I’ll know if someone knocks the card over.
It does not protect the passenger door or seat, but could with a yard of fishing line tied to the card and looped onto the window crank handle on the passenger door. If someone opens that door, it would pull the card with it and trigger the alarm.
I’ll get a better idea on setting this up and will share it when I have it. This works for now. It is a good peace-of-mind for $25.
I’ll tape the magnet to the transmitter when travelling so I don’t run down the little battery in the transmitter.
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