Introduction

Helper library for the MCP4728 I2C 12-bit Quad DAC

Dependencies

This driver depends on:

• Adafruit CircuitPython
• Bus Device

Please ensure all dependencies are available on the CircuitPython filesystem. This is easily achieved by downloading the Adafruit library and driver bundle.

Installing from PyPI

On supported GNU/Linux systems like the Raspberry Pi, you can install the driver locally from PyPI. To install for current user:

pip3 install adafruit-circuitpython-mcp4728

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

sudo pip3 install adafruit-circuitpython-mcp4728

To install in a virtual environment in your current project:

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

Usage Example

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.

For information on building library documentation, please check out this guide.

Contributing

Contributions are welcome! Please read our Code of Conduct before contributing to help this project stay welcoming.