Commit f4a19645 authored by Roland Richter's avatar Roland Richter

Add example 'Dimmer' for LinuxWochen Linz workshop

parent d9e94dd6
/* Dimmer.ino
*
* Copyright 2015 Roland Richter
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty
* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
* See the GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
// Der analoge Eingangs-Pin des Sensors
const int QRDPin = A0;
// Der Ausgangs-Pin der LED
const int LEDPin = 11;
void setup()
{
pinMode(QRDPin, INPUT);
pinMode(LEDPin, OUTPUT);
}
void loop()
{
// Lies analogen Wert im Bereich [0,1023] ein, verwandle diesen in einen
// Wert im Bereich [0,255], und gib diesen Wert aus.
int value = analogRead(QRDPin);
int out = map(value, 0, 1024, 0, 255);
int pwm = constrain(out, 0, 255);
analogWrite(LEDPin, pwm);
delay(100);
}
/* IDEEN:
1. An welche Pins kann eine "dimmbare" LED angeschlossen werden, und an
welche nicht? Warum?
*/
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