This current sensor board is based on the Allegro ACS712ELCTR-05A bi-directional hall-effect current sensor chip that detects positive and negative flowing
currents in the range of minus 5 Amps to positive 5 Amps. The board operates at 5V DC and the current flow through the sensor is converted to an output
voltage starting at 1/2Vcc (or 2.5V) for no current flow and moves up 185mV per amp for positive current or down -185mV per amp for negative current.
For example:
The output voltage at +2 amps would be (2.5V + (0.185 * 2)) = 2.870 V
The output voltage at -5 amps would be (2.5V - (0.185 * 5)) = 1.575 V
- 1 — ACS712 Current Sensor Module 5A
VCC | 5V DC Nominal |
Measurement Range | -5 to +5 A |
Voltage at 0A | VCC/2 (Nominally 2.5V DC) |
Scale Factor | 185mV per A |
Dimensions: | |
Length | 31.73 mm (1.24") |
Width | 13.25 mm (0.52") |
Height | 14 mm (0.55") |
Weight | 2.72 g (0.096 oz) |