Hi guys,
I'd like to build a voltage drop data logger to help find what circuit is draining a cars battery intermittently. I looked at the DVM with an arduino project but i'm not sure that is the right circuit to measure a voltage drop.
Here's some details; When there is a parasitic draw in a circuit, there will be a voltage drop across that circuits fuse. Depending on the fuse size, the voltage drop correlates to an amount of current draw through the fuse. When there is a hard failure, you can find the problem circuit this way, but when the issue is intermittent and not present when in the shop then your goose is cooked.
The ranges is in millivolts of course but if the fuse happens to blow, the voltage will rise to battery voltage of 12 to 14.5 volts
Any suggestions ?
Sid
I'd like to build a voltage drop data logger to help find what circuit is draining a cars battery intermittently. I looked at the DVM with an arduino project but i'm not sure that is the right circuit to measure a voltage drop.
Here's some details; When there is a parasitic draw in a circuit, there will be a voltage drop across that circuits fuse. Depending on the fuse size, the voltage drop correlates to an amount of current draw through the fuse. When there is a hard failure, you can find the problem circuit this way, but when the issue is intermittent and not present when in the shop then your goose is cooked.
The ranges is in millivolts of course but if the fuse happens to blow, the voltage will rise to battery voltage of 12 to 14.5 volts
Any suggestions ?
Sid