sensor

Wireless Motion Sensor

motion-sensor-spectrum.JPG
Wireless stuff is fun! If you look at the picture above, the thing to the right, clamped to a vice, is a motion sensor (PIR sensor) that has a small addition on it's back. That addition is a small PCB that I designed, milled and soldered recently, with an ATmega microcontroller and a cheap radio-module on it. The thing to the left is a spectrum analyzer showing that the device is indeed sending radio signals. In the background you can also see a radio-controlled RGB light controller, but that's a story for a later time.

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