DAC Unit MCP4725 I2C DAC Converter

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Description

DAC, like its namesake, is a high performance digital/analog signal convertor. Build with MCP4725,which is a low-power, high accuracy, single channel, 12-bit buffered voltage output Digital-to-Analog Convertor (DAC) with non-volatile memory(EEPROM).

Same as ADC, DAC communicates with I2C. The address is 0x60.

Product Features

  • Up to 12 bits of resolution
  • Output 0~3.3V voltage
  • Program Platform: Arduino, UIFlow(Blockly, Python)
  • Two Lego-compatible holes

Kit includes

  • 1x DAC Unit
  • 1x Grove Cable

APPLICATION

  • MP3 Audio Player
  • mini Oscilloscope

 

Documents
Learn

Example

Arduino IDE

The code below is incomplete(just for usage). To get the complete code, please click here.

/*
    hardware : m5stack uint dac
    please install adafruit MCP4725 lib
*/
#include <Wire.h>
#include <Adafruit_MCP4725.h>

// new a object
Adafruit_MCP4725 dac;

// initialization
dac.begin(0x60);
dac.setVoltage(2048, false);

// 12bit value , false mean not write EEPROM
dac.setVoltage(1024, false);// input digital value "1024" to unit
delay(1000);
dac.setVoltage(2048, false);// input digital value "2048" to unit
delay(1000);
More information

Schematic

PinMap

M5Core(GROVE A) GPIO22 GPIO21 5V GND
DAC Unit SCL SDA 5V GND

 

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