How do I make a biometric (fingerprint) scanner based keyless ignition for my car? Answered
I need advice on how to make a fingerprint scanner control a 12v relay for use as a keyless ignition for my car. I know how to do the wiring as far as the car's ignition/starting system, what I don't know is how to make a fingerprint scanner close a 12v relay and keep it closed until I turn the car off. Any help, suggestions, or guidance would be appreciated.