1, the current sensor chip ACS712ELC-050; ACS712ELC - 20; ACS712ELC - 30;

2, pin 5 v power supply, the onboard power light;

3 30A plus or minus current can be measured, module, the corresponding analog output 100 mv/A;

4, no current through testing, the output voltage is VCC / 2;

5, the size of the PCB board: 31 (mm) x13 (mm);