The MCP4725 is an I2C controlled Digital-to-Analog converter (DAC) that allows a digital device like a microcontroller to output analogue values like a sine wave. Digital to analog converters are great for sound generation, musical instruments, and many other creative projects! This breakout board features the easy-to-use MCP4725 12-bit DAC - Control it via I2C and send it the value you want it to output, and the VOUT pin will have it. Great for Audio and Analog projects when you need a sine wave or adjustable bias point, and there's a full tutorial for the Raspberry Pi!
The ADDR pins are broken out so you can connect two of these DACs on one I2C bus, just tie the ADDR pin of one high to keep it from conflicting. Also included is a 6-pin header, for use in a breadboard and works with both 3.3V or 5V logic.
There's even a bunch of extra's!
For chips that have "3.4Mbps Fast Mode I2C" you can update the Vout at ~200 KHz.
There's an EEPROM so if you write the output voltage, you can 'store it' so if the device is power cycled it will restore that voltage.
The output voltage is rail-to-rail and proportional to the power pin so if you run it from 3.3V, the output range is 0-3.3V. If you run it from 5V the output range is 0-5V.
Compatible with both 3.3V or 5V logic
Control via I2C (3.4Mbps Fast Mode Compatible for Vout at ~200 KHz)
EEPROM lets you "store" an output voltage
Able to connect dual DAC's on one I2C bus
Includes 6 Pin Header for Breadboarding
Perfect for Audio/Analog Projects when a Sine Wave or Adjustable Bias Point is required.
Wiring it up is easy - connect VDD to your microcontroller power pin (3-5V), GND to ground, SDA to I2C Data (on the Arduino Uno, this is A4 on the Mega it is 20 and on the Leonardo digital 2), SCL to I2C Clock(on the Arduino Uno, this is A5 on the Mega it is 21 and on the Leonardo digital 3) and listen on VOUT.