Description: This is a breakout board for the fully integrated Hall Effect based linear ACS712 current sensor. The sensor gives precise current measurement for both AC and DC signals. Thick copper conductor and signal traces allows for survival of the device up to 5 times overcurrent conditions.
The ACS712 outputs an analog voltage output signal that varies linearly with sensed current. The device requires 5VDC for VCC and a couple of filter capacitors. Please keep in mind that though the ACS712 is rated for 2.1kV isolation, the PCB it is on is not designed for that type of voltage. Please keep that in mind if you are using this breakout in high voltage applications.
Based on 2 ratings:
Haven’t quite got to the point of using and testing the units yet (6). My project is a 1.5 KW Vdmos Linear amplifier. I’m using the 712’s for closed loop bias control. The fit and finish of Sparkfun products is always spot on and I’ve never had one problem with their products. I hope to have this project online in the next month.
Has anyone had success with this sensor? With and without a 120VAC load, I always get a constant 2.5VDC output. A 300W (2.5 A) AC load should produce a 463 mV output, and a 640W (5 A) load should produce 925 mV output. I measure no change in output with a voltmeter. I have it powered and grounded by a 5V Arduino with the capacitors as recommended by the datasheet and the wiring.org example. :-(