If you are a regular visitor to my website or YouTube Channel, you have already experience the same kind of project. The purpose of making this project is to make help the vehicle owner that they have no Steering Wheel audio control switches. But I know including me it is very helpful to control audio using such physicals switches.
The previous tutorial was about making a simple controller with switches. But I wanted to improve it especially for traditional volume controllers and few more important switches.
Accordingly, I was done some researches to make this project successful. I will show those testing projects as well later.
Watch the Video Description.
The final project is included especially two controllers with Rotary Encoders. One is for Volume and another one is for move the back and next.
You may need the following parts,
Atmega 328P IC - 01
16Mhz Cristal - 01
 |
22pf ceramic capacitors - 02
D400 Transistors - 04
Rotary Encoders - 02
7805 Regulator - 01
104 pf Ceramic - 01
10uf capacitor - 01
IN 4001 Diode - 01
27k (1/4W)Resistors - 04
100 pf Capacitors - 04
10k (1/4W)Resistors - 10
5k Preset - 01
1 k (1/4W) Resistors 01
Wires
Arduino Board
Soldering equipment's
Connectors, etc,
Plastic Box
Read the Following circuit diagram carefully before making the project.
You can use the following link to download the diagram.
How to connect the wires.
01. Give the power 12 volts from the car ACC wire and ground the pin correctly.
02.Connect KEY 1 wire with the KEY 1 of the unit and
There may be two wires called “KEY” and “KEY 1” in-car head
unit. Sometimes the “KEY” wire will not work correctly. If so connect the KEY 1
wire with the car steering wheel control unit.
unit. Sometimes the “KEY” wire will not work correctly. If so connect the KEY 1
wire with the car steering wheel control unit.
03.Tune the correct delay to activate the switch using the 5k preset.
Go to the Settings >Steering Wheel Learning of your car
head unit Then,
Touch the "volume UP button" of the car head unit and rotate to
right side the rotary encoder 1. If the device is not detected or the click is
too much long, adjust the delay time using 5k variable resistors (preset)
Then Touch the "volume DOWN" button of the car head unit and rotate
to the left side the rotary encoder 1.
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/*this car steering wheel audio control buttons is programmed as universal circuit.
* This can be used to Volume up and down and, to back and next button. The both rotary encoder
* swiches are recommended for that purposes. and also more 2 switches are with the rotary encoders.
*
* Programmed by : BMIAK Basnayaka
* for SetNFix Youtube channel
* web : http://www.setnfix.com
* date : 08.06.2021
* Video Link https://youtu.be/m4KO8INEGUo
*/
//Volume Controler
int testPin=A0;
int volOne = A2;
int volTwo = A1;
int directionV=0;
int counterV = 0;
int currentStateCLKV;
int previousStateCLKV;
//Next and previous Button
#define nextOne A4
#define nextTwo A3
int counterN = 0;
int currentStateCLKN;
int previousStateCLKN;
int progSwitch = A5;
int progData=0;
int volUp = 12;
int volDown = 11;
int back = 10;
int next = 9;
int delayMe =0; // Time need to click a button to activate 1000 = 1 second
int delayBtn = 2000; // Time need to click a button to prgramme the buttons 1000 = 1 second
void setup() {
// put your setup code here, to run once:
Serial.begin(9600);
pinMode(volOne,INPUT);
pinMode(volTwo, INPUT);
pinMode(nextOne,INPUT);
pinMode(nextTwo,INPUT);
pinMode(progSwitch,INPUT);
pinMode(volUp,OUTPUT);
pinMode(volDown,OUTPUT);
pinMode(back,OUTPUT);
pinMode(next,OUTPUT);
pinMode(testPin,OUTPUT);
previousStateCLKV = digitalRead(volOne);
previousStateCLKN = digitalRead(nextOne);
}
void loop() {
progData = analogRead(progSwitch);
delayMe = map(progData,0,1023,200,2000);
//Serial.println(delayMe);
volumeControler();
nextPrevious();
//
//delay(1000);
}
void volumeControler(){
//Volume Controler
// Read the current state of inputCLK
currentStateCLKV = digitalRead(volOne);
//Serial.println(currentStateCLKV);
// If the previous and the current state of the inputCLK are different then a pulse has occured
if ((currentStateCLKV == LOW)&&(previousStateCLKV==HIGH)){
//Serial.println(currentStateCLKV);
// If the inputDT state is different than the inputCLK state then
// the encoder is rotating counterclockwise
if (digitalRead(volTwo)==LOW) {
digitalWrite(volDown,HIGH);
analogWrite(testPin,10);
Serial.println("DOWN");
delay(delayMe);
digitalWrite(volDown,LOW);
analogWrite(testPin,0);
//previousStateCLKV = currentStateCLKV;
} else {
// Encoder is rotating clockwise
digitalWrite(volUp,HIGH);
analogWrite(testPin,20);
Serial.println("UP");
delay(delayMe);
digitalWrite(volUp,LOW);
analogWrite(testPin,0);
// previousStateCLKV = currentStateCLKV;
}
//Serial.println(counterV);
}
// Update previousStateCLK with the current state
previousStateCLKV = currentStateCLKV;
/*if (directionV == 1){
digitalWrite(volDown,HIGH);
Serial.println("DOWN");
delay(delayMe);
digitalWrite(volDown,LOW);directionV =0;}
if (directionV == 2){
digitalWrite(volUp,HIGH);
Serial.println("UP");
delay(delayMe);
digitalWrite(volUp,LOW);directionV =0;}
*/
}
void nextPrevious(){
// Read the current state of inputCLK
currentStateCLKN = digitalRead(nextOne);
// If the previous and the current state of the inputCLK are different then a pulse has occured
if ((currentStateCLKN==LOW) && (previousStateCLKN==HIGH)){
// If the inputDT state is different than the inputCLK state then
// the encoder is rotating counterclockwise
if (digitalRead(nextTwo) ==LOW) {
counterN --;
digitalWrite(next,HIGH);
analogWrite(testPin,30);
Serial.println("BACK");
delay(delayMe);
analogWrite(testPin,0);
digitalWrite(next,LOW);
} else {
// Encoder is rotating clockwise
counterN ++;
digitalWrite(back,HIGH);
Serial.println("NEXT");
analogWrite(testPin,40);
delay(delayMe);
digitalWrite(back,LOW);
analogWrite(testPin,0);
}
}
// Update previousStateCLK with the current state
previousStateCLKN = currentStateCLKN;
}
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