CJMCU-226 INA226 Current Sensor Module

The CJMCU-226 is a high-precision current, voltage, and power monitoring module based on the INA226 digital power monitor IC. It is designed to measure both bus voltage and shunt voltage, allowing accurate calculation of current and power consumption in DC systems. Communication with a microcontroller is done via the I²C interface, making it suitable for embedded and IoT applications.

Technical Specifications:

• Sensor IC: INA226
• Bus voltage range: 0 to 36 V
• Shunt voltage measurement range: ±81.92 mV
• Maximum measurable current: depends on external shunt resistor (commonly up to several amps)
• Shunt resistor: onboard low-resistance precision resistor
• Interface: I²C (SDA, SCL)
• I²C address: configurable (via address pins)
• Supply voltage (VCC): 3.0 V to 5.5 V
• Current measurement resolution: up to 16-bit
• Power measurement: supported (calculated internally by INA226)

Features:

• High accuracy current, voltage, and power measurement
• Digital I²C output reduces noise and improves reliability
• Programmable conversion times and averaging
• Onboard precision shunt resistor
• Compact module suitable for breadboards and PCBs
• Supports bidirectional current measurement

Applications:

• Battery monitoring systems
• Power supply and DC load monitoring
• Energy measurement and power management projects
• Microcontroller-based systems (Arduino, ESP32, Raspberry Pi, etc.)
• Robotics, solar power systems, and embedded electronics
• Overcurrent detection and system diagnostics