| 
  • If you are citizen of an European Union member nation, you may not use this service unless you are at least 16 years old.

  • Introducing Dokkio, a new service from the creators of PBworks. Find and manage the files you've stored in Dropbox, Google Drive, Gmail, Slack, and more. Try it for free today.

View
 

analog input

Page history last edited by Kristin Lucas 11 years, 2 months ago
Scroll down or Click on links for programs and schematics:
 

Program a potentiometer

 

Program a potentiometer

 

 

Recommended: refer to the wiring diagram for potentiometer on Arduino playground

 

Alternatively refer to this diagram:

This program will allow adjust the speed of a blinking LED with analog input. Follow this patch to connect a potentiometer to your Arduino board. Then put an the long lead of an LED in pin 13 of your digital in/out, and the short lead in Ground.

Download the diagram.

 potentiometer.pdf

 

/*

 * AnalogInput

 * by DojoDave <http://www.0j0.org>

 *

 * Turns on and off a light emitting diode(LED) connected to digital  

 * pin 13. The amount of time the LED will be on and off depends on

 * the value obtained by analogRead(). In the easiest case we connect

 * a potentiometer to analog pin 2.

 */

 

int potPin = 2;    // select the input pin for the potentiometer

int ledPin = 13;   // select the pin for the LED

int val = 0;       // variable to store the value coming from the sensor

 

void setup() {

  pinMode(ledPin, OUTPUT);  // declare the ledPin as an OUTPUT

}

 

void loop() {

  val = analogRead(potPin);    // read the value from the sensor

  digitalWrite(ledPin, HIGH);  // turn the ledPin on

  delay(val);                  // stop the program for some time

  digitalWrite(ledPin, LOW);   // turn the ledPin off

  delay(val);                  // stop the program for some time

}

 

Program a flex sensor
 
A Flex sensor changes resistance between 10k Ohms (straight) and 40k Ohms (bent). Follow this schematic to patch a flex sensor to your Arduino board. Connect the long lead of an LED in pin 13 of your digital in/out, and the short lead in Ground.

 

 

 

 

Download the schematic and breadboard diagram.

 
Copy and paste the following code into an Arduino sketch: 
 
 
int ledPin = 13; // declares a variable for the pin for an LED
int analoginPot = 2;   // declares a variable for the analog input pin
int potval = 0;   // declares a variable for reading the pin status
 
unsigned long ledCounter = 0; // a special integer variable for really big numbers
int toggle = 0; // declares a variable for a light switch, sets value to either 1 or 0
 
void setup() {
 pinMode(ledPin, OUTPUT);   // declares pin 13 as the output
 Serial.begin(9600);     // necessary if we want to report back to screen later in the script
}
 
void loop(){
  potval = analogRead(analoginPot);  // reads input value of analog pin 2
  Serial.println(potval);
  potval = (potval - 764);  // bend your flex sensor with serial monitor ON, subtract the lowest value received by your sensor
 
 ledCounter ++;  // adds 1 to our variable, represents time btwn on and off
 if (ledCounter > (potval * 10)) {  // multiplies potval variable times 10
                                                    // if condition is met it does the following...
   ledCounter = 0; // resets counter
   Serial.println("blink"); // prints the word “blink” in the Serial monitor
   
   if (toggle == 0){ // checks if light is switched on or off
     digitalWrite(ledPin, HIGH); // light (LED) turns on
     toggle = 1; // changes the switch for next time, so that the next time through it sets toggle to off
   }
   else if (toggle == 1){ // if toggle value is 1 and not 0 then ...
     digitalWrite(ledPin, LOW); // turns light on
     toggle = 0; // changes the switch for next time through
   }
 }
}   
 

Comments (0)

You don't have permission to comment on this page.