Description
Monitor voltage, current, and power draw in your electronics projects with precision using the INA219 I2C Current/Power Monitoring Module.
This smart breakout board (CJMCU-219) uses the INA219B chip to provide bidirectional, high-side current sensing over an I2C interface – ideal for battery-powered, solar, robotics, or embedded systems.
Forget juggling multiple multimeters—this module gives you real-time digital readings of both voltage and current with 1% precision, right from your microcontroller.
- Chipset: INA219B
- Measurement Type: Bidirectional High-Side DC Current & Voltage
- Voltage Range (Target): 0V to +26V
- Current Measurement: Up to ±3.2A
- Resolution: As fine as 0.1mA (±400mA range) or 0.8mA (±3.2A range)
- Built-in Resistor: 0.1Ω ±1% 2W current sense resistor
- Interface: I2C (SCL/SDA)
- Power Supply: 3.0V to 5.5V (logic level compatible)
- ADC Resolution: 12-bit
- Breadboard-Friendly: Includes 6-pin header
- Load Connection: Includes detachable 3.5mm terminal block
What’s Included:
- 1x INA219 I2C CJMCU-219 Power Monitoring Module
- 1x 6-Pin Header
- 1x 3.5mm Terminal Block Connector
Great For:
- Measuring current and voltage in battery-powered projects
- Monitoring solar panels, power supplies, and motors
- Robotics and automation systems
- Embedded systems with Arduino, ESP32, Raspberry Pi, STM32, etc.
- STEM learning, electronics diagnostics & prototyping
Usage Tips:
- Connect VIN+ to your power source and VIN- to your load
- Power the module with 3–5V and connect I2C (SDA/SCL) to your microcontroller
- Use libraries like Adafruit_INA219 in Arduino for easy setup
- To increase current range, the onboard sense resistor can be replaced (e.g., 0.01Ω = ±32A range)
