Info From A Lead Acid Battery On An Engine?

Started by eeboarder August 17, 2009
I am developing a system that is powered from a 12V or 24V lead acid
battery configuration on an industrial engine. These are the same lead acid
batteries used in vehicles. The batteries or battery will always be charged
by an alternator running off of the engine.

Is it possible to get a run signal just from the battery? The PIC24F
microcontroller being used needs to be able to tell if the engine is on or
off. If could monitor the engine operation(on or off) from the power
source, I wouldn't need an additional device to monitor this(oil pressure
switch).