Trying to implement a DAC
A few tutorials on ways to do it below that I am following:
How to use MCP4725 12-Bit DAC Module with Arduino
Downloads | MCP4725 12-Bit DAC Tutorial | Adafruit Learning System
The first tutorial uses and UNO in this configuration
In this configurtion SCL/SDA come from A4/A5
It appears the pinout I made in the schematic is different
This matches the device we are using
It is an UNO
The UNL we are using is made by this company
Ruggeduino-ET "Extended Temperature" -40C - 85C — Rugged CircuitsRugged Arduino
I have tried to run the demo code but nothing is connecting / working
For reference this is the schematic
some code
/*
*/
#include <Wire.h>
#include <Adafruit_MCP4725.h>
Adafruit_MCP4725 dac;
#define digitalPin2 2 // Port 2 for reading the door interlock state
#define digitalPin4 4 // Port 2 for turning on the cabinet LEDs
#define digitalPin6 6 // Port 6 for Power LED on light field alignment
#define digitalPin8 8 // Port 8 for slecting dimming method
#define digitalPin10 10 // Port 10 for Green LED on filter
#define digitalPin12 12 // Port 12 for Green LED on filter
#define digitalPin13 13 // Port 13 for reading the push button on the light field module
#define DAC_RESOLUTION (9) // Set this value to 9, 8, 7, 6 or 5 to adjust the resolution
#define potentiometerPin A1
int x =0;
int interlockstate=0;
int pushbuttonlightfield=0;
int analogPin = A5;
int Thumb_Dimmer_Pin = A1;
int Thermo_Pin = A2;
float rawvalue=0;
float rawvalue2=0;
float rawvalue3=0;
float voltagevalue=0;
float Thumbvoltagevalue=0;
float Thermovoltagevalue=0;
//ISR//float value = 100; //3035;
void setup()
{
Serial.begin(9600); //begin serial data
pinMode(digitalPin2, INPUT); // Port 2 for reading the interlock state
pinMode(digitalPin4, OUTPUT); // Port 4 for Cabinet LEDs
pinMode(digitalPin6, OUTPUT); // Port 6 for Power LED on light field alignment is an output
pinMode(digitalPin8, OUTPUT); // Port 8 for Dimming method select is an output
pinMode(digitalPin10, OUTPUT); // Port 10 for Green LED on filter is an output
pinMode(digitalPin12, OUTPUT); // Port 12 for Yellow LED on filter is an output
pinMode(digitalPin13, INPUT); // Port 13 for reading the push button on the light field module
//pin 13 is not on an interrrupt for state change so might need to change the switch
}
void loop()
{
delay (500); //rev 3, delay to slow system down
//Read this to see if the push button to turn on the LED is pushed or not
pushbuttonlightfield = digitalRead(digitalPin13);
// Serial.print("Push button state (0 is not pushed): ");
// Serial.println(pushbuttonlightfield);
//check if serial communication is avaiable
//then issue responce if command recognized
//using println rather than print so there is new line feed issued
//took this part from Filter recogition code
if (Serial.available() > 0) {
String rx_byte = Serial.readStringUntil('\n');
rx_byte.trim();
if (rx_byte == "CMD1") {
digitalWrite(digitalPin12, LOW); // turn off Yellow LED in filter module
Serial.println("SUC1"); //CMD1 responce
}
if (rx_byte == "CMD2") {
digitalWrite(digitalPin12, HIGH); // turn on Yellow LED on filter module
Serial.println("SUC2"); //CMD2 responce
}
if (rx_byte == "CMD3") {
digitalWrite(digitalPin10, LOW); // turn on Green LED on filter module
Serial.println("SUC3"); //CMD2 responce
}
if (rx_byte == "CMD4") {
digitalWrite(digitalPin10, HIGH); // turn on Green LED on filter module
Serial.println("SUC4"); //CMD2 responce
}
if (rx_byte == "CMD5") {
digitalWrite(digitalPin8, LOW); // Set Dimming method to Analog
Serial.println("SUC5"); //CMD2 responce
}
if (rx_byte == "CMD6") {
digitalWrite(digitalPin8, HIGH); // Set Dimming method to Digital
Serial.println("SUC6"); //CMD2 responce
}
if (rx_byte == "CMD7") {
digitalWrite(digitalPin6, HIGH); // turn on Power LED on light field alignment module
Serial.println("SUC7"); //CMD2 responce
}
if (rx_byte == "CMD8") {
digitalWrite(digitalPin6, LOW); // turn off Power LED on light field alignment module
Serial.println("SUC8"); //CMD2 responce
}
if (rx_byte == "CMD9") {
interlockstate = digitalRead(digitalPin2); // 0 door open, 1 door closed
Serial.println(interlockstate); //(0 is door open)
}
if (rx_byte == "CMD10") {
rawvalue = analogRead(analogPin); // voltage Primary Trimpot:
voltagevalue = rawvalue*(5.00)/1023.00;
Serial.println(voltagevalue, 3); // Print voltage with 3 decimal places
}
if (rx_byte == "CMD11") {
rawvalue3 = analogRead(Thermo_Pin); // Read the analog input from thermocouple
Thermovoltagevalue= rawvalue3*(5.00)/1023.00;
Serial.println(Thermovoltagevalue, 3); // Print voltage with 3 decimal places
}
if (rx_byte == "CMD12") {
rawvalue2 = analogRead(Thumb_Dimmer_Pin); // Read the analog input from thumb wheel
Thumbvoltagevalue = rawvalue2*(5.00)/1023.00;
Serial.println(Thumbvoltagevalue, 3); // Print voltage with 3 decimal places
}
if (rx_byte == "CMD13") {
digitalWrite(digitalPin4, HIGH); // turn off Power LED on light field alignment module
Serial.println("SUC13"); //CMD2 responce
}
if (rx_byte == "CMD14") {
digitalWrite(digitalPin4, LOW); // turn on Power LED on light field alignment module
Serial.println("SUC14"); //CMD2 responce
}
if (rx_byte == "CMD15") {
// https://how2electronics.com/how-to-use-mcp4725-12-bit-dac-module-with-arduino/
// https://learn.adafruit.com/mcp4725-12-bit-dac-tutorial/download
// make sure to install Installed Adafruit MCP4725@2.0 before compiling
dac.setVoltage((1 * 4095) / 5, false); //Set voltage to 1V
delay(2000);
dac.setVoltage((2 * 4095) / 5, false); //Set voltage to 2V
delay(2000);
dac.setVoltage((3 * 4095) / 5, false); //Set voltage to 3V
delay(2000);
dac.setVoltage((4 * 4095) / 5, false); //Set voltage to 4V
delay(2000);
dac.setVoltage(4095, false); //Set voltage to 5V or (Vcc)
delay(2000);
}
}
}
Any thoughts on how to fix this?
