Not anymore. The easy solution is to just turn them off. That won't work though.
So I was pondering, "how can I automatically turn my lights off"?
If I go through the ignition switch, anytime I need light but key off, it won't work.
If I use a oil psi switch I can once again only have headlights with engine running.
So I want headlights that turn off below a certain voltage, thus leaving me enough to crank the engine, but otherwise operate normally.
They sell a device that cuts off everything once voltage drops below 11.xx volts, and will then only let you crank engine while holding brake pedal down. Sounds too complicated, and by time 11.xx volts is reached, you are almost stone dead.
They always told us 12.45ish is about 25% discharged, or 75% left. Seems like a suitable place to have headlights shut off.
Couldn't figure out exactly how to trigger this sequence automatically. Not so electronically inclined. Go figure.
What I am thinking is, maybe I can use zener diodes? Electronic version of pressure "pop offs" only allowing voltage to pass through when it is above a certain threshold. I am wondering if I can take (2) 6.2V zeners in series, so voltage only passes through above 12.4v? Can I then attach that output to a NPN transistor to switch the ground side of a normal relay?
It seems like anytime voltage was higher than 12.4, there would be some current flow through the diodes, which would trigger the transistor to apply ground to the relay, and turn headlights on. When voltage fell below, the relay would shut off. Is this correct? If so, I think I could do this for under $10, and at the same time upgrade to relay controls for headlights instead of running all the current through the switch. Double whammy?
I don't imagine I will find a lot of electronically savvy individuals here, but I would rather chance that, as opposed to get in over my head on some electronic forum and have to try to fight off nerdy overkill circuit designs.