hello,
I'm looking to create a circuit to control another circuit that I have built for vehicles. I need the a automatic low battery shutoff. The main idea is before battery power gets below a threshold where the car would not have the power to start the car it would throw a relay to disconnect my circuit. I was thinking of a compairing circuit to monitor voltage. Problem is after about 30 minutes of my system running with the vehicle off my battery voltage drops to 11.99v my understanding is that at 12v my car battery is considered "dead". However my car starts with no issues at this 11.99 volts. Now I know that this voltage isn't really accurate because the battery is under load. Hence my problem...anyone have an idea on how to monitor a battery under load and then turn my circuit off if battery power drops to a point where it won't have the power to start the car?
Any ideas are appreciated!
I'm looking to create a circuit to control another circuit that I have built for vehicles. I need the a automatic low battery shutoff. The main idea is before battery power gets below a threshold where the car would not have the power to start the car it would throw a relay to disconnect my circuit. I was thinking of a compairing circuit to monitor voltage. Problem is after about 30 minutes of my system running with the vehicle off my battery voltage drops to 11.99v my understanding is that at 12v my car battery is considered "dead". However my car starts with no issues at this 11.99 volts. Now I know that this voltage isn't really accurate because the battery is under load. Hence my problem...anyone have an idea on how to monitor a battery under load and then turn my circuit off if battery power drops to a point where it won't have the power to start the car?
Any ideas are appreciated!