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INA219 I2C Interface Power Monitoring Module CJMCU-219 DC Voltage Current Sensor
Description and Specification
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)
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All refund requests must be within 30 days of receipt of goods.
Refunds/Exchanges are only given when agreed to by an email and Items must be in the condition they were received.
All return shipping charges are at your cost unless product is faulty although they may be refunded solely at our discretion.
The Buyer must contact the Seller within 5 days of the End of the Sale and Payment must be made within 7 days unless agreed beforehand with the seller.
All Payment must be made and Cleared before items are dispatched.
Pay pal transactions can only be sent to the address registered with pay pal.
All refund requests must be within 30 days of receipt of goods.
Refunds/Exchanges are only given when agreed to by an email and Items must be in the condition they were received.
All return shipping charges are at your cost unless product is faulty although they may be refunded solely at our discretion.
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