ACS712 Current Board comes in 3 different models of this integrated circuit, depending on the maximum measured current : 5A 20 or 30A
5A Module 20A Module 30A Module
Supply Voltage (VCC) 5VDC 5VDC 5VDC
Measurement Range -5 to +5 A -20 to +20 A -30 to +30 A
Voltage at 0A VCC/2 VCC/2 VCC/2
Scale Factor 185 mV/A 100 mV/A 66 mV/A
Variant ACS712ELC-05A ACS712ELC-10A ACS712ELC-30A
For our today experiment, I will use the one below, a 100mV/A one: