This module is a sensor module used to detect the current, voltage, and power of circuits. It supports I2C interface communication and can be used with other microcontrollers such as Arduino to monitor the current and voltage of robot vehicle motors and other applications.INA219 at -40C to + 1% can be achieved within the maximum error accuracy 85C temperature range, the maximum offset is 100 uV. The high-precision products combine the advantages of 12-bit resolution, as much as possible to help customers reduce the pressure drop on the shunt resistor, thereby minimizing power loss and power consumption and save board space. The device can be sensed bus voltage range of 0 V to +26 V.
Product parameters
Working voltage: DC3V-5V
Communication interface: I2C interface
Maximum measured voltage: 26V
Maximum measured current: 3.2A, resolution ± 0.8mA
Measurement accuracy: 1%
I2C address:
The default I2C address is 0x40. If necessary, please change it
For example, using multiple modules or conflicting with another I2C address.
It can be changed by short circuiting the A0 and A1 solder pads on the board: the default value for solder pad suspension is 0x40
A0 pad short circuit: Address 0x41
A1 pad short circuit: Address 0x44
A1 and A0 pads short circuited: Address 0x45
VCC: Connected to the positive pole of a 3V-5V power supply
GND: Connect to the negative pole of the power supply
SDA: I2C Serial Data
SCL: I2C Serial Clock
Vin -: Connect to the positive terminal of the load
Vin+: Connect to the positive terminal of the load power supply
Current detection
The module uses a 0.1 ohm 1% 2W current sensing resistor, which can provide 3.2A current processing capability. Low resistance minimizes voltage drop, and at full rated current, the voltage drop across the current sensing resistor will be 0.32V.
If you want to change the current measurement range, you can replace the resistor with a smaller or larger value. For example, a 0.01 Ω resistor allows for measuring up to 32A of current with a resolution of 8mA, while a 1 Ω resistor will reduce the measurement range to 320mA with a resolution of 0.08mA
