RobotGeek TeamWade Filewich
Published © CC0

Control a Large Linear Actuator With Arduino

This Arduino Linear Actuator Tutorial shows how to do basic manual control of a large linear actuator using an Arduino and two buttons.

BeginnerProtip30 minutes39,094
Control a Large Linear Actuator With Arduino

Things used in this project

Hardware components

12 Inch Stroke 110 LB Linear Actuator with Feedback
×1
RobotGeek Geekduino
RobotGeek Geekduino
×1
Arduino UNO & Genuino UNO
Arduino UNO & Genuino UNO
OPTION: Can be used in place of Geekduino
×1
RobotGeek Sensor Shield
RobotGeek Sensor Shield
×1
RobotGeek Pushbutton
RobotGeek Pushbutton
×2
RobotGeek Relay
RobotGeek Relay
×2
RobotGeek 6V/2A Power Supply
×1
RobotGeek 12V/5A Power Supply
×1
RobotGeek Large Workbench
×1

Software apps and online services

Arduino IDE
Arduino IDE

Story

Read more

Schematics

Wiring Large Linear Actuator

Wiring Large Linear Actuator

Code

Code snippet #1

Plain text
/*

Manual Linear Actuator Control using an Arduino and two pushbuttons
 
This demo shows how to do basic manual control of a large linear
actuator using an Arduino and two buttons. The first button extends
the actuator and the second retracts the actuator.
 
 
 The circuit:
 * RobotGeek Pushbutton - Digital Pin 2
 * RobotGeek Pushbutton - Digital Pin 4
 * RobotGeek Relay - Digital Pin 7 
 * RobotGeek Relay - Digital Pin 8 
 
Products Used in this demo:
 - http://www.robotgeek.com/linear-actuators
 - http://www.robotgeek.com/robotgeek-geekduino-sensor-kit
 - http://www.robotgeek.com/robotGeek-pushbutton
 - http://www.robotgeek.com/robotgeek-relay


 */

// constants won't change. They're used here to set pin numbers:
const int button1Pin = 2;     // the number of the pushbutton1 pin
const int button2Pin = 4;     // the number of the pushbutton2 pin
const int relay1Pin =  7;      // the number of the Realy1 pin
const int relay2Pin =  8;      // the number of the Relay2 pin

// variables will change:
int button1State = 0;         // variable for reading the pushbutton status
int button2State = 0;         // variable for reading the pushbutton status

const int sensorPin = 0;    // select the input pin for the potentiometer
int sensorValue = 0;  // variable to store the value coming from the sensor


void setup() { 
  
  
  //start serial connection
  Serial.begin(9600);  
  
  // initialize the pushbutton pin as an input:
  pinMode(button1Pin, INPUT);     
  pinMode(button2Pin, INPUT);    
  // initialize the relay pin as an output:
  pinMode(relay1Pin, OUTPUT);    
  pinMode(relay2Pin, OUTPUT);    
}

void loop(){
  
  
  // read the value from the sensor:
  sensorValue = analogRead(sensorPin); 
  //print out the value of the pushbutton
  Serial.println(sensorValue);    
  
  // read the state of the pushbutton values:
  button1State = digitalRead(button1Pin);
  button2State = digitalRead(button2Pin);

  // check if the pushbutton1 is pressed.
  // if it is, the buttonState is HIGH:
  // we also ensure tha the other button is not pushed to avoid conflict
  if (button1State == HIGH && button2State == LOW) {     
    // turn relay1 on:    
    digitalWrite(relay1Pin, HIGH);  
  } 
  // When we let go of the button, turn off the relay
  else if (digitalRead(relay1Pin) == HIGH) {
    // turn relay1 off:
    digitalWrite(relay1Pin, LOW); 
  }
  
  // repeat the same procedure for the second pushbutton
  if (button1State == LOW && button2State == HIGH) {     
    // turn relay2 on:    
    digitalWrite(relay2Pin, HIGH);  
  } 
  // When we let go of the button, turn off the relay
  else if (digitalRead(relay2Pin) == HIGH) {
    // turn relay2 off:
    digitalWrite(relay2Pin, LOW); 
  }  
}

Code snippet #2

Plain text
/*

Linear Actuator Control using preset position
 
This demo shows how to do basic control of a large linear
actuator using an Arduino and two buttons. Each button is hard
coded with a preset position. Pressing a button will move
the actuator to that position.
 
 The circuit:
 * RobotGeek Pushbutton - Digital Pin 1
 * RobotGeek Pushbutton - Digital Pin 2
 * RobotGeek Relay - Digital Pin 4 
 * RobotGeek Relay - Digital Pin 7 
 
Products Used in this demo:
 - http://www.robotgeek.com/linear-actuators
 - http://www.robotgeek.com/robotgeek-geekduino-sensor-kit
 - http://www.robotgeek.com/robotGeek-pushbutton
 - http://www.robotgeek.com/robotgeek-relay
 
 */

// constants won't change. They're used here to set pin numbers:
const int button1Pin = 2;     // the number of the pushbutton1 pin
const int button2Pin = 4;     // the number of the pushbutton2 pin
const int relay1Pin =  7;      // the number of the Realy1 pin
const int relay2Pin =  8;      // the number of the Relay2 pin
const int sensorPin = 0;    // select the input pin for the potentiometer

// variables will change:
int button1State = 0;         // variable for reading the pushbutton status
int button2State = 0;         // variable for reading the pushbutton status
int sensorValue = 0;  // variable to store the value coming from the sensor

int goalPosition = 350; 
int CurrentPosition = 0; 
boolean Extending = false;
boolean Retracting = false;

void setup() { 


  //start serial connection
  Serial.begin(9600);

  // initialize the pushbutton pin as an input:
  pinMode(button1Pin, INPUT);     
  pinMode(button2Pin, INPUT);    
  // initialize the relay pin as an output:
  pinMode(relay1Pin, OUTPUT);    
  pinMode(relay2Pin, OUTPUT);    
  
  //preset the relays to LOW
  digitalWrite(relay1Pin, LOW); 
  digitalWrite(relay2Pin, LOW); 

  
}

void loop(){
  
  // read the value from the sensor:
  CurrentPosition = analogRead(sensorPin); 

  
  // print the results to the serial monitor:
  Serial.print("Current = " );                       
  Serial.print(CurrentPosition);      
  Serial.print("\t Goal = ");      
  Serial.println(goalPosition);  
  
  // read the state of the pushbutton values:
  button1State = digitalRead(button1Pin);
  button2State = digitalRead(button2Pin);

  if (button1State == HIGH) {     
    // set new goal position
    goalPosition = 300; 
    
    if (goalPosition > CurrentPosition) {
        Retracting = false;
        Extending = true;
        digitalWrite(relay1Pin, HIGH);  
        digitalWrite(relay2Pin, LOW);  
        Serial.println("Extending");     
    }      
    else if (goalPosition < CurrentPosition) {
        Retracting = true;
        Extending = false;
        digitalWrite(relay1Pin, LOW);  
        digitalWrite(relay2Pin, HIGH); 
        Serial.println("Retracting");         
    }  
  }

  if (button2State == HIGH) {     
    // set new goal position
    goalPosition = 500; 
    
    if (goalPosition > CurrentPosition) {
        Retracting = false;
        Extending = true;
        digitalWrite(relay1Pin, HIGH);  
        digitalWrite(relay2Pin, LOW);  
        Serial.println("Extending");   
    }        
    else if (goalPosition < CurrentPosition) {
        Retracting = true;
        Extending = false;
        digitalWrite(relay1Pin, LOW);  
        digitalWrite(relay2Pin, HIGH); 
        Serial.println("Retracting");         
    }  
  }



  if (Extending = true && CurrentPosition > goalPosition) {
    //we have reached our goal, shut the relay off
    digitalWrite(relay1Pin, LOW); 
    boolean Extending = false; 
    Serial.println("IDLE");  
  }
  
  if (Retracting = true && CurrentPosition < goalPosition){
    //we have reached our goal, shut the relay off
    digitalWrite(relay2Pin, LOW); 
    boolean Retracting = false; 
    Serial.println("IDLE");  
  }


  
  
}

Github file

https://github.com/robotgeek/largeLinearManualButton/archive/master.zip

Github file

https://github.com/robotgeek/largeLinearPresetPositions/archive/master.zip

Credits

RobotGeek Team

RobotGeek Team

35 projects • 162 followers
The RobotGeek team is a 6-man operation that wants to make it even easier to use Arduino to make electronics and robots.
Wade Filewich

Wade Filewich

35 projects • 75 followers
Hi, I'm Wade, and I'm Projects and Marketing for RobotGeek/Trossen Robotics. I spend all of my free time making things and lying on the floor crying.

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