ATSAMD09 Breakout Board with Seesaw Adafruit ATSAMD09 Breakout Board with Seesaw is a near-universal converter framework and is great for the development of seesaw capabilities. This breakout board allows the user to add or add and extend hardware support to any I2C-capable microcontroller or microcomputer. The ATSAMD09 breakout board can be configured to give a wide range of capabilities including I2C GPIO expanders, ADCs, and PWM drivers without extra expenditures. This breakout board features 3x 12-bit ADC inputs, 3x 8-bit PWM outputs, and 7x GPIO with selectable pull-up or pulldown. The ATSAMD09 breakout board also offers 1x NeoPixel output, 1x EEPROM with 64bytes of NVM memory, and 2x I2C address selection pins.