Product Description
The MCP2221A USB to GPIO ADC I2C Converter Module allows a computer to directly communicate with I2C devices, GPIO, and analog signals over USB, without using a microcontroller. By connecting this module to a PC via USB, you can control sensors, displays, LEDs, buttons, and other peripherals directly using software such as Python on Windows, Linux, or macOS.
This module is based on the Microchip MCP2221A chip and acts as a general-purpose USB bridge that provides GPIO control, analog input, DAC output, and I2C communication. The integrated STEMMA QT / Qwiic connector enables quick, solder-free connections to compatible I2C sensors and modules.
Key Features
USB to I2C, GPIO, ADC, and DAC bridge
Direct control from PC without microcontroller firmware
I2C interface for sensors, OLEDs, displays, and drivers
GPIO pins configurable as digital input or output
10-bit ADC inputs for analog signal measurement
5-bit DAC output for basic analog voltage generation
STEMMA QT / Qwiic connector for plug-and-play I2C devices
Works with Windows, Linux, and macOS
Technical Specifications
| Parameter | Specification |
|---|
| Core Chip | MCP2221A |
| USB Interface | USB Type-C |
| I2C Interface | I2C master |
| GPIO | 4 multifunction pins |
| ADC Resolution | 10-bit |
| DAC Resolution | 5-bit |
| Logic Voltage | 3.3V |
| Onboard Regulator | 3.3V |
| Operating System Support | Windows, Linux, macOS |
| Connector | STEMMA QT / Qwiic JST-SH 4-pin |
How to Use
Connect the module to your computer using a USB Type-C cable
Connect I2C sensors or devices using a STEMMA QT or Qwiic cable
Use Python or other supported software libraries to control GPIO, read ADC values, or communicate over I2C
No firmware flashing or microcontroller programming required
Applications
Rapid I2C sensor testing and evaluation
USB-controlled GPIO and LED projects
Data acquisition and analog signal monitoring
PC-based automation and prototyping
Educational and laboratory experiments
Debugging and development of I2C devices
Package Includes
Why Choose This Module
This MCP2221A module eliminates the need for a separate microcontroller when testing or controlling hardware from a computer. With built-in USB, ADC, DAC, GPIO, and I2C support, it provides a compact and flexible solution for rapid prototyping, automation, and sensor interfacing. The STEMMA QT / Qwiic compatibility ensures clean, reliable connections with no soldering required.
Upgrade your workflow and connect your computer directly to the hardware world with this versatile MCP2221A converter module. Order now and simplify your development process.
