ACS712 Hall Effect Current Sensor Module - 5A/20A/30A Range Options, Analog Voltage Output, Compatible with Arduino/STM32

Current sensor chips: ACS712ELCTR-05B, ACS712ELCTR-20A, ACS712ELCTR-30A; 
2. 5V power supply for the pins, on-board power indicator light; 
3. The module can measure currents ranging from -5 amps to 20 amps or 30 amps, and the corresponding analog output is 100 mV per amp. 
4. When no current is flowing through, the output voltage is VCC/2. 
5. PCB board size: 31 (mm) x 13 (mm); 

1. Note: ACS712 is based on the principle of Hall detection. When using it, please try to avoid any influence from magnetic fields!

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