![]() ![]() ![]() Different resistor values are often required for different speeds. The way I2C works is that the microcontroller pulls the signal low, but if it is not pulling the signal low than the on board pull up resistor will pull it high. Additionally, if you are looking to have more than one MCP4725 on a bus, the pull-up resistors on this board can be disabled just check the Hookup Guide in the Documents section below for instructions and tips on doing this. Also on board are SCL, SDA, VCC, and another GND for your basic I 2C pinout. This board breaks out each pin you will need to access and use the MCP4725 including GND and Signal OUT pins for connecting to an oscilloscope or any other device you need to hook up to the board. This version of the MCP4725 Breakout fixes a few issues with the board including the IC footprint, the I 2C pinout, changes the overall board dimensions to better fit your projects, and a few more minor tweaks. Digital to analog converters are great for sound generation, musical instruments, and many other creative projects! A DAC allows you to send analog signal, such as a sine wave, from a digital source, such as the I 2C interface on the Arduino microcontroller. 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 I 2C controlled Digital-to-Analog converter (DAC).
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