Looking for a circuit- proximity switch ?
I am building a fiberglass car and I do not want to have any door handles. In otherwords, this will be a very smooth body. I am looking for a circuit to make a proximity swith that has 2 elements in it. When I pass my hand over one of the plates it latches power to the second sensor and when I pass my hand over it it causes a solenoid to open my door. One of my students made a similar device for me a few years back and it got destroyed by mice in my car.. I will be using isolation relays with 1 amp draw to operate the door solenoid at 12 v. Any ideas?I already have 2 3x4 inch metal plates fiberglassed into the body for antenna.