Ding:interaktiver Aldi LED Streifen
interaktiver Aldi LED Streifen
Eine einfache Bastelei mit Ultraschallentfernungsmessung und Ausgabe auf einem LCD- Display und dem LED- Streifen. Eine gepatchte Version der Adafruit NeoPixel Lib. Datei:Adafruit NeoPixel Aldi.zip Für das Nokia 5110 das Lib http://www.henningkarlsen.com/electronics/library.php?id=44 kann man natürlich auch weglassen. Und den Code Datei:AldiLEDs hc sr04 ultraschall.ino.zip .
Und hier der Sketch ohne LCD Display:
int pingPin = 3; int inPin = 2;
int mittel = 0;
- include <Adafruit_NeoPixel.h>
- define PIN 6
Adafruit_NeoPixel strip = Adafruit_NeoPixel(50, PIN, NEO_GRB + NEO_KHZ800);
void setup() {
strip.begin(); strip.show(); // Initialize all pixels to 'off'
}
void loop() { // establish variables for duration of the ping, // and the distance result in inches and centimeters: long duration, inches, cm;
// The PING))) is triggered by a HIGH pulse of 2 or more microseconds. // Give a short LOW pulse beforehand to ensure a clean HIGH pulse: pinMode(pingPin, OUTPUT); digitalWrite(pingPin, LOW); delayMicroseconds(2); digitalWrite(pingPin, HIGH); delayMicroseconds(10); digitalWrite(pingPin, LOW);
// The same pin is used to read the signal from the PING))): a HIGH // pulse whose duration is the time (in microseconds) from the sending // of the ping to the reception of its echo off of an object. pinMode(inPin, INPUT); duration = pulseIn(inPin, HIGH);
// convert the time into a distance
cm = microsecondsToCentimeters(duration);
delay(10);
int dm = cm/10;
mittel = (mittel * 9 + dm) / 10;
for (int P = 0; P <mittel; P++)
{ strip.setPixelColor(P, 0, 0, 254);
}
for (int P = 50; P >mittel; P--)
{ strip.setPixelColor(P, 0, 255, 0);
} strip.setPixelColor(mittel, 255, 0, 0); strip.show();
}
long microsecondsToCentimeters(long microseconds)
{
// The speed of sound is 340 m/s or 29 microseconds per centimeter.
// The ping travels out and back, so to find the distance of the
// object we take half of the distance travelled.
return microseconds / 29 / 2;
}