This is what I'm working with:
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int pinSpeaker = 11;
//
int led[10] = { 2, 3, 4, 5, 6, 7, 8, }; // Assign the pins for the leds
int leftChannel = 0; // left channel input
int left, i;
void setup () {
pinMode(pinSpeaker, OUTPUT);
//
for (i = 0; i < 10; i++) // Tell the arduino that the leds are digital outputs
pinMode(led[i], OUTPUT);
// Serial.begin(9600); // Uncomment to enable troubleshoo
//
}
void loop () {
//
left = analogRead(leftChannel); // read the left channel
// Serial.println(left); // uncomment to check the raw input.
left = left / 5; // adjusts the sensitivity
Serial.println(left); // uncomment to check the modified input.
// left = 1500; // uncomment to test all leds light.
// left = 0; // uncomment to check the leds are not lit when the input is 0.
if (left == 0) // if the volume is 0 then turn off all leds
{
for(i = 0; i < 10; i++)
{
digitalWrite(led[i], LOW);
}
}
else
{
for (i = 0; i < left; i++) // turn on the leds up to the volume level
{
digitalWrite(led[i], HIGH);
}
for(i = i; i < 10; i++) // turn off the leds above the voltage level
{
digitalWrite(led[i], LOW);
}
}
//
playTone(50, 500);
playTone(100, 1000);
playTone(50, 500);
playTone(100, 2000);
playTone(750, 50);
//no
}
// duration in mSecs, frequency in hertz
void playTone(long duration, int freq) {
duration *= 1000;
int period = (1.0 / freq) * 1000000;
long elapsed_time = 0;
while (elapsed_time < duration) {
digitalWrite(pinSpeaker,HIGH);
delayMicroseconds(period / 2);
digitalWrite(pinSpeaker, LOW);
delayMicroseconds(period / 2);
elapsed_time += (period);
}
}
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I stole some code a while back that makes an LED VU type meter and more recently I figured out how to manipulate some code to generate little tones for my robot. I have a vague notion about how the 2 sets of code work and I've learned a little about manipulating stuff to tailor them but I'm not sure if I can do what I'm setting out to do which is playing some tones with the arduino and having them show up as a simple LED display.
Any help would be awesome! The code compiles OK (Which is a minor miracle) but when testing it out it plays the tones 8 times (Why 8 times?) and goes silent.
I'm trying to learn proper structure and such but for some reason it just eludes me...
