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Proximity Testing (Keyless Ignition System)

 by mavii ¦  Sat Jan 12, 2019 12:08 am ¦  Forum: Projects ¦  Topic: Proximity Testing (Keyless Ignition System) ¦  Replies: 0 ¦  Views: 83

I'm interested in building a low power proximity sensor. I want it to be able to detect proximity in 3 dimensions similar to the say a Keyless Ignition System works in a car. I am not sure where to start. Does anyone know: 1) What technology is used in cars? 2) What other options I might use? 3) Wha...