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+5v : 5v Supply gnd : Supply Ground out : Output Voltage proportional to current, 11mV/A for 5V supply o/c : Over-Current Detection Digital Output, Low on Over-Current, High otherwise
Current=(Vout-2.5)/0.011
Note: Over Current can be detected by adjusting the preset for desired value of current [the blue potentiometer!]. Turn preset clockwise to increase current range and anti-clockwise to decrease current range.
On over current, o/c pin goes low and red LED glows.
OUT goes to the analog pin (ADC). In the Arduino Topic they are discussing the math as well:
float scalefactor = 0.011; float current = ((5.0/1024.)*AnalogRead(A0)-2.5)/scalefactor;
(scalefactor derived from spec sheet: 11mV/A with a 5V power supply)
O/C goes to a digital pin to detect over-current (normal = HIGH. over-current = LOW). I'm pretty sure that it is not required to use this pin, unless you'd like to detect over-current of course.
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