Hi, new user here! Know and use ohms law but I'm more familiar with digital circuits than analog.
Anyway I have an automotive problem. The sort version is I have an LED which I'd like to close a switch to a large relay. I already have a switch to the relay on the dash near the LED in question. I was wondering if there was a low voltage relay I could run in series do accomplish this simply.
Background: I rewired an ambulance (camper van) to isolate the battery with a voltage-sensing relay (basically a 500 amp relay that sits between the deep cycle bank and the starter battery that engages if either battery is being charged so both banks get charged by the alternator or solar). Now, I have a 35 amp 12v air compressor which I only want to run when the batteries are being charged (so as not to drain batteries or run it in the evening). I don't want to go through the expense of using a second voltage-sensing relay. I already have a full duty relay (came with the ambulance and is wired to a switch on the dash) so if I could add a relay inline to that switch which is triggered by the LED I'd be close to a complete solution.
An alternative could be to add another voltage sensing relay, but that would be like $80 I'd rather not spend plus the effort in installing it plus I'd have to route another switch to the dash.
Any input would be appreciated
Anyway I have an automotive problem. The sort version is I have an LED which I'd like to close a switch to a large relay. I already have a switch to the relay on the dash near the LED in question. I was wondering if there was a low voltage relay I could run in series do accomplish this simply.
Background: I rewired an ambulance (camper van) to isolate the battery with a voltage-sensing relay (basically a 500 amp relay that sits between the deep cycle bank and the starter battery that engages if either battery is being charged so both banks get charged by the alternator or solar). Now, I have a 35 amp 12v air compressor which I only want to run when the batteries are being charged (so as not to drain batteries or run it in the evening). I don't want to go through the expense of using a second voltage-sensing relay. I already have a full duty relay (came with the ambulance and is wired to a switch on the dash) so if I could add a relay inline to that switch which is triggered by the LED I'd be close to a complete solution.
An alternative could be to add another voltage sensing relay, but that would be like $80 I'd rather not spend plus the effort in installing it plus I'd have to route another switch to the dash.
Any input would be appreciated