MCP2221A USB to GPIO ADC I2C Breakout Board

Adafruit MCP2221A USB to GPIO ADC I2C Breakout Board allows the user to drive a tiny OLED display, read a color sensor, or even flash some LEDs directly from a computer. The breakout board is based on the MCP2221A, a USB-to-UART/I²C converter from Microchip. The chip is similar to a USB to serial converter, but it also adds a GPIO and I²C interface. The analog/digital GPIO pins can act as 10-bit analog inputs (ADC), and there is a 5-bit DAC output included. The I²C interface is great for talking to OLEDs, sensors, and PWM drivers. The user can use the GPIO to do things like flash LEDs, read switches or buttons, and more.