Quote:
Originally Posted by Occasionally6
The sensor will need the ~5V reference, a resistor or two (see below) and ground to complete the circuit, but it doesn't have to be connected to the car. A USB from "12V" adaptor should work to provide the reference 5V voltage. I have bought cheap Chinese USB cables for $4 that are suitable to cut and make the connections to the sensor. I would not use a USB voltage sourced from a PC or similar device (in the interests of the device).
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What would you recommend for the voltage source? I might be able to get my hands on a DC power supply but there are no guarantees on that one. Any other ideas would be appreciated.