I’m getting everything together that I need to use the xem access controller v2 to unlock my car and was wondering if anyone came up with a solution to alternate between lock and unlock when scanning. As it stands I can wire it up for unlock only but having both lock and unlock would be an added bonus. Also will I need a voltage regulator to keep the voltage at or below 12V or will 13.5V not be a problem?
I could probably figure something out with an arduino but iirc that will have a significantly higher power draw while idling which wouldn’t be ideal for something connected to a car battery.
That’s pretty much exactly what I was looking for. I have a spare key fob I’m going to use for the project, I’ll put it together and test to see if it’ll pull too much power and kill the battery if the car is stopped for a few days.
I am fairly new to hobby electronics. I have some extensive knowledge about troubleshooting automotive electronics and circuits but I don’t really know what off the shelf components are available to build circuits. What type of sensor could I integrate into the circuit to power on only when needed, the only two I know of would be something like a photoresistor or a reed switch and I don’t think either of those would be useful for this application. I wanted to make a working prototype and then find a way to mitigate excess idle power consumption. I had also thought of getting something like a 5w solar panel with a charge controller to power this and any other future projects as well as keep the battery topped off but I’m not sure how that would affect battery longevity.