Adafruit INA219 High-Side DC Current Sensor
adafruit-ina219-current-sensor
adafruit-ina219-current-sensorINA219 high-side current and bus-voltage monitor breakout. It is powered from 3.3V or 5V and communicates over I2C. Route the measured load current through VIN+ and VIN-; those shunt terminals are part of the power path, not MCU GPIO.
Pinout
| Pin | Position | Type | Function | Voltage |
|---|---|---|---|---|
| VCC | power | Breakout logic supply; Adafruit notes it can be powered from Arduino 5V or 3V. | 5 | |
| GND | ground | Ground reference shared with the controller and measured circuit. | ||
| SDA | i2c | I2C data line. | ||
| SCL | i2c | I2C clock line. | ||
| VIN+ | data | High-side shunt input terminal; connect in series with the load supply, not to an MCU GPIO. | ||
| VIN- | data | Load-side shunt terminal; connect in series with the load supply, not to an MCU GPIO. |
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