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Analog input, analog output, serial output
Reads an analog input pin, maps the result to a range from 0 to 255 and uses
the result to set the pulse width modulation (PWM) of an output pin.
Also prints the results to the Serial Monitor.
The circuit:
- potentiometer connected to analog pin 0.
Center pin of the potentiometer goes to the analog pin.
side pins of the potentiometer go to +5V and ground
- LED connected from digital pin 9 to ground
created 29 Dec. 2008
modified 9 Apr 2012
by Tom Igoe
This example code is in the public domain.
// These constants won't change. They're used to give names to the pins used:
int but1=2;
int but2=3;
int pwmValue =0;
void setup() {
// initialize serial communications at 9600 bps:
void loop() {
void increase()
pwmValue = pwmValue + 10;
if(pwmValue > 255) pwmValue = 0;;
Serial.print("String length is: ");
void reset_pwm(){
pwmValue =0; // 0V