This IO expansion board based on the CH423 chip extends 24 digital ports via I2C, including 8 GPIOs with interrupt functions and 16 GPOs.
CH423 has a built-in current drive circuit that offers a 15mA continuous drive current, which can statically drive 24 LED tubes or dynamically drive 128 LEDs. This CH423 I2C to GPIO IO expander is suitable for projects involving LED tubes, dot matrix screens, light cubes, etc.
Connect Diagram
Features:
8 general input/output pins16 general output pinsBuilt-in driving circuit, up to 15mA continuous driving currentApplications:
Driving LED lightsDriving Dot matrix screen Driving Light Cubes Specification:
Power Supply: 3.3V~5VStatic Current: 1mAIO Continuous Driving Current: 15mACommunication: I2CI2C Address: 0x20-0x3F(The module occupies I2C address of 0x20-0x3F and cannot work with I2C device in this address range.)Operating Temperature Range: -20~80Size: 45*37mm/1.78*1.46”Documents:
Product Includes:
Gravity: CH423 I2C 24 Digital IO Expansion Module x1 Gravity-4P I2C/UART Sensor cable x1
