You've always wanted to output analog voltages from a microcontroller, the MCP4725 is the DAC that will let you do it! The MCP4725 is an I2C controlled Digital-to-Analog converter (DAC). A DAC allows a digital device like a microcontroller to output analog values like a sine wave. Digital to analog converters are great for sound generation, musical instruments, and many other creative projects!

Features:

• 12-bit resolution
• I2C Interface (Standard, Fast, and High-Speed supported)
• Small package
• 2.7V to 5.5V supply
• Internal EEPROM to store settings
  

• Schematic
• MCP4725 Datasheet
• Example I2C Code for ATmega168