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Old 10-20-2014, 12:22 AM   #1 (permalink)
P.I.Engineer
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Join Date: Jan 2009
Default Current sensor repackage

i got the 40A smart sensor for my X3, it's kind of bulky and doesn't really stealth install too well.

So, i split the boards and made the sensor board remote.

The current sensor is just a current shunt. Current is measured by reading the voltage drop across a resistor on the +(high side).

on the sensor board there are 3 points coming out, each side of the resistor and a ground connection.

the resistor points are for measuring current
the ground connection is for the voltage readout from the sensor.

splitting the boards takes some effort and a good soldering iron. I removed the yellow housings and desoldered the pin/sockets from the board. I put on my own sockets and some wire with a connector on it. Then i just tied the boards back together with a length of wire. Now i can have the logic part of the sensor some where else and out of the way.
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