Introduction

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Helper library for the MCP4728 I2C 12-bit Quad DAC

Dependencies

This driver depends on:

• Adafruit CircuitPython <https://github.com/adafruit/circuitpython>_
• Bus Device <https://github.com/adafruit/Adafruit_CircuitPython_BusDevice>_

Please ensure all dependencies are available on the CircuitPython filesystem. This is easily achieved by downloading the Adafruit library and driver bundle <https://circuitpython.org/libraries>_.

Installing from PyPI

On supported GNU/Linux systems like the Raspberry Pi, you can install the driver locally from PyPI <https://pypi.org/project/adafruit-circuitpython-mcp4728/>_. To install for current user:

.. code-block:: shell

pip3 install adafruit-circuitpython-mcp4728

To install system-wide (this may be required in some cases):

.. code-block:: shell

sudo pip3 install adafruit-circuitpython-mcp4728

To install in a virtual environment in your current project:

.. code-block:: shell

mkdir project-name && cd project-name
python3 -m venv .venv
source .venv/bin/activate
pip3 install adafruit-circuitpython-mcp4728

Usage Example

.. code-block:: python3

import board
import adafruit_mcp4728

i2c = board.I2C()   # uses board.SCL and board.SDA
mcp4728 =  adafruit_mcp4728.MCP4728(i2c)

mcp4728.channel_a.value = 65535 # Voltage = VDD
mcp4728.channel_b.value = int(65535/2) # VDD/2
mcp4728.channel_c.value = int(65535/4) # VDD/4
mcp4728.channel_d.value = 0 # 0V


mcp4728.save_settings() # save the current values to the eeprom,making them the default on power up

Documentation

API documentation for this library can be found on Read the Docs <https://docs.circuitpython.org/projects/mcp4728/en/latest/>_.

For information on building library documentation, please check out this guide <https://learn.adafruit.com/creating-and-sharing-a-circuitpython-library/sharing-our-docs-on-readthedocs#sphinx-5-1>_.

Contributing

Contributions are welcome! Please read our Code of Conduct <https://github.com/adafruit/Adafruit_CircuitPython_MCP4728/blob/main/CODE_OF_CONDUCT.md>_ before contributing to help this project stay welcoming.