INTRODUCTION

• Servo Motor
• Attiny 44
• 1 R 10kohm
• 1 capacacitor 1uf
• 3 AvrISP pin head
• 1 Resonator 20MHz
• POT 20K
• push button

The Idea: I need to make a start/stop button for the code, and control my servo with 90 dgree by using POT

I used Eagle to design my board

you can learn more about Eagle here

and I used Hello echo board

• I started with Hello Echo board
• Now we need to make an action with POT
• we can consider the POT is an analog sensor
• so, we can read the analog with arduino via analog ports
• this syntax to read it

   int sensorValue = analogRead(A0); 

• this the simple code to proof that

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                  // the setup function runs once when you press reset or power the board
                  void setup() {
                  // initialize digital pin LED_BUILTIN as an output.
                  pinMode(LED_BUILTIN, OUTPUT);
                 }

                // the loop function runs over and over again forever
                void loop() {
                    int sensorValue = analogRead(A0);
                  digitalWrite(LED_BUILTIN, HIGH);   // turn the LED on (HIGH is the voltage level)
                  delay(sensorValue);                       // wait for a second
                  digitalWrite(LED_BUILTIN, LOW);    // turn the LED off by making the voltage LOW
                  delay(sensorValue);                       // wait for a second
                }

                

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• and this code for the start/stop buttons

                   
                #define pb 2  
                #define pb1 3
                #define buz 11 
                int count=0;
                void setup() 
                {
                  pinMode(pb,INPUT_PULLUP);
                  pinMode(pb1,INPUT_PULLUP);
                  pinMode(buz,OUTPUT);
                }
                
                void loop() 
                {
                  if(digitalRead(pb)==LOW)
                  {
                    delay(10);
                    while(digitalRead(pb)==LOW);
                    count++;
                    if(count==2) count=0;
                  }
                  
                  if(digitalRead(pb1)==LOW&&count==true)
                  {
                    delay(10);
                    digitalWrite(buz,HIGH);
                  }else digitalWrite(buz,LOW);
                  
                }
                 

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• Test1

• the same idea here, we need control the duration of motion for servo motor

• Note

  : This circuit is for both input and output, but what interests us here is the input, which is represented here by the POT



• its very easy, you can open Arduino IDE
• and go to the examples and choose the liquid crystal
• just follow the instructions

• I built my code on the Hellow world example, and sweep for servo
• based on my idea, I devided the movement of servo to tow sections with 90 degree:Inhaling for Right moving, Exhaling for left moving
• to simplify my code, i built tow VOID functions for Inh and Exh