Current Measurement

[Al Skierkiewicz]

Chuck,
Many years ago we developed Stangsense using a MAX4172 Maxim high side current monitor. We simply made a series of one foot long #10 wires with a sense lead at each end. The MAX4172 then measures the voltage drop across the wire (which is ~0.1 volt/ft/100amp) and then ported that to a A/D and some multiplex circuitry to a digital input on the IFI controller. It then allowed us to port that into the dashboard stream which we configured a Palm to accept data from and we had data on current from a variety of motors along with the sampled battery voltage which was part of the dashboard stream as well as other useful items. I believe the schematic resides on CD here someplace for the price a search.