I am working on a bike power project, and i'm just starting to get into world of arduino, so any help is much appreciated.
I want to measure 12v dc current at two points; supply and load to a deep cycle battery. using two (hopefully inexpensive) hall effect sensors, i wanted to use the arduino to compare the current reading in to and out of the battery and to activate two different sets of lights depending on the result of the comparison eg. more power going in than out turns on a green light, more power going out than in turns on a red light.
i have seen a whole load of hall effect sensors out there and am not sure which to use or how to build the circuit. would i need to amplify the signal from the sensor before it reaches the arduino?
any help welcome on hardware/circuit diagram/code to make it work...
thanks in advance.