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Originally Posted by Vladimir
I believe I have the current sensor wired up properly but the controller reads a number around 867 and never moves from that, no matter how much current I pass through it. I'm sure the PWM cable to the RC is aligned correctly. I tested the analog inputs with another device and they work fine (0-1023).. if I disconnect it the value floats around as it should, connect it, 867. Any ideas? Is it defective? I heatsunk it while soldering to make sure it wasn't damaged.
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Vladimir,
As many have suggested, get out your multimeter. Check first that you have 5 volts at the right pin on the chip. Then check the output pin, with no current flowing it should be at 2.5 volts. If it is very low, check that the capacitor has been inserted correctly. Double check that there is no solder bridge between pins or adjacent circuit pads, top and bottom of board. If it is at 2.5 volts then check that you have 2.5 volts at the input to the RC, PWM cables are known to go bad. It is very common for a three wire cable to get reversed when looking at it upside down so double check that the right wire goes to the right hole.
Now, if anyone has any real experience with these can you express whether external magnetic fields affect the output? Thanks,