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In this lesson we learn how to use MCP4725 12 bits Digital To Analog Converter (DAC). The chip and module is explained, datasheet viewed and then using 5 Projects this MCP4725 practically shown. Full wiring diagram and wring shown and how to use the code and library explained.
In Project 1 in lesson 109 Using MCP4725 12bits DAC with Ardunino
/*
* Lesson 109-1: Generates output DC Voltage from 0 to 5.5V or lower. if power supply
* is 3.3V, then max voltage is 3.3V.
* you can use it simply to enter your request as millivolt like 365mV
* or 2.872V
*
* * Watch Video instrution for this code:https://youtu.be/j_BwZT9z-0g
Projects in this video: https://youtu.be/j_BwZT9z-0g
Project 1 (this project):Output 0 to 5V or 0 to 3V depending on which kind of power sources you use for the module. The output shown on digital multimeter.
Project 2: Serial command to set voltage
Project 3: PWM duty cycle to Voltage converter
Project 4: Using two MCP4725 DAC modules
Project 5: Using Push button to set voltage on LCD
* Written by Ahmad Shamshiri using Adafruit library for MCP4725
Sep 26, 2022
www.Robojax.com
*
* This code is part of Arduino Step by Step Course which starts here: https://youtu.be/-6qSrDUA5a8
*
* for library of this code visit http://robojax.com/
*
If you found this tutorial helpful, please support me so I can continue creating
content like this. Make a donation using PayPal by credit card https://bit.ly/donate-robojax
* * This code is "AS IS" without warranty or liability. Free to be used as long as you keep this note intact.*
* This code has been download from Robojax.com
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>.
Based on the Adafruit MCP4725 Library
----> http://www.adafruit.com/products/935
Adafruit invests time and resources providing this open source code,
please support Adafruit and open-source hardware by purchasing
products from Adafruit!
*/
#include <Wire.h>
#include <Adafruit_MCP4725.h>
int refV = 4530;//reference voltage. see video for details
Adafruit_MCP4725 dac;
int mV;
float V;
void setup(void) {
Serial.begin(9600);
Serial.println("MCP4725 by Robojax");
//run i2C scanner to find out the I2C address and enter it below
//see video for details https://youtu.be/j_BwZT9z-0g
//get more code from www.Robojax.com
dac.begin(0x60);
Serial.println("Output Voltage");
}
void loop(void) {
// setmV(465);//set output to 465mV
// Serial.print(mV);
// Serial.println("mV");
// delay(5000);
//
// setV(2.635);//set output to 2.6V
// Serial.print(V, 3);
// Serial.println("V");
// delay(5000);
// Serial.println();
for(int i=0; i<refV; i +=100)
{
setmV(i);
Serial.println(i);
}
//see video for details https://youtu.be/j_BwZT9z-0g
//get more code from www.Robojax.com
}
/*
* setmV()
* sets mV value such as 35mV or 2654mV (2.654V)
* Written Sep 25, 2022
* by Ahmad Shamshiri www.Robojax.com
*/
void setmV(int d)
{
mV =d;
dac.setVoltage(map(d, 0, refV, 0, 4095), false);
}
/*
* setV()
* sets Voltage value value in volts such as 3.764
* Written Sep 25, 2022
* by Ahmad Shamshiri www.Robojax.com
*/
void setV(float d)
{
V = d;
dac.setVoltage( map((d *1000), 0, refV, 0, 4095), false);
}
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