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EEVblog #1334 – Mystery Dumpster Teardown

Mystery dumpster teardown time! With the most amazing mechanical mains power switch you’ll ever see! ...

8 comments

  1. Jeri Ellsworth has also a nice video about PIR sensors:

    http://www.youtube.com/watch?v=YEFb7OkmtNE

  2. A trail camera = a PIR sensor + a stripped down pocket camera? Or am I wrong?

  3. This tear down reminded me of my early days working in the security business. Your explanation of how the PIR sensor works is great. I remember when the first dual-tech models were introduced. The microwave sensors were poorly designed and would trip the system to easily.

    It was also common to mask the inside of the Fresnel lens to create “pet allies” for some customers.

  4. One other thing is, in a pinch, you can wire the tamper switch in series with the alarm contact and detect both with two wires, in case you don’t have 6 wire alarm cable to your motion detector…

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