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Results tagged with proximity-sensor
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user 43203
A proximity sensor detects the presence of another object without physical contact. There are many different kinds, examples include capacitive, inductive and others using various wavelengths including ultrasonic, visible and non-visible light and RF.
13
votes
Designing a Santa alarm (honestly)
Ok, to all those who contributed, thank you! I combined a few nuggets from you all and a simple 6-12 volt siren from Radio Shack with a battery pack and produced the traps (See pics). We placed the pr …
- 1,559
138
votes
7
answers
14k
views
Designing a Santa alarm (honestly)
You read the title and that's what I am trying to do.
Synopsis: I have a young son who is determined to catch Santa (to what ends I don't know). He even dreamed up using some kind of pressure plate a …
- 1,559