Short video (m4v) of a piezo, photoresistor and Arduino….
Here’s the breadboard view to wire this up yourself…
And.. here’s the code we used from TodBot!
int photosensorPin = 0;
int piezoPin = 9;
int val = 0;
void setup() {
pinMode(piezoPin, OUTPUT);
}
void loop() {
digitalWrite(piezoPin, LOW);
val = analogRead(photosensorPin);
val = val/2;
for( int i=0; i<500; i++ ) { // play it for 50 cycles
digitalWrite(piezoPin, HIGH);
delayMicroseconds(val);
digitalWrite(piezoPin, LOW);
delayMicroseconds(val);
}
}
Cool little project. I just bought a photoresistor but didn’t know what to do with it. I’ll try this soon!
Also: how did you do the breadboard/Arduino diagram? From scratch or is there a template that can be used with other software?
Comment by MikeD — May 20, 2009 @ 2:37 pm
check out fritzing.org – that’s how we make the diagrams.
Comment by adafruit — May 20, 2009 @ 2:57 pm
It looks like the source code was accidentally mutilated.
Comment by Len — May 20, 2009 @ 4:26 pm
fixed – we were adding some new formatting.
Comment by adafruit — May 20, 2009 @ 5:28 pm
The “for” Loop needs to be updated with “piezoPin” instead of “speakerPin” in the digitalWrite elements.
Comment by Jon — May 21, 2009 @ 11:23 pm