G'day all.
So I finally decided to have a go at a POV clock and found this on youtube.
Sweet. So I've got the leds and resistors on a proto board and they blink and the disk rotates but the letters are jumbled because I don't have a phototransistor to tell the Arduino mini where to start and finish.
I salvaged some from an old Epson XP100 printer and I have included a pic of it here.
The phototransistor has 4 pins out from the little board but I can't seem to get an input to my sample sketch.
/*
-Arduino Position Encoder
-Using a generic photo-interrupter
-Basic Test Sketch 1 / June 2014
-Tested at TechNode Protolabz
-www.electroschematics.com/
*/
const int encoderIn = 8; // input pin for the interrupter
const int statusLED = 13; // Output pin for Status indicator
const int pulseOutput = 12; // Pulse output pin for external interfacing
int detectState=0; // Variable for reading the encoder status
void setup()
{
pinMode(encoderIn, INPUT); //Set pin 8 as input
pinMode(statusLED, OUTPUT); //Set pin 13 as output
pinMode(pulseOutput, OUTPUT); // Set Pin 12 as output
}
void loop() {
detectState=digitalRead(encoderIn);
if (detectState == HIGH) { //If encoder output is high
digitalWrite(statusLED, HIGH); //Turn on the status LED
digitalWrite(pulseOutput,HIGH); // Give a logic-High level output
}
else {
digitalWrite(statusLED, LOW); //Turn off the status LED
digitalWrite(pulseOutput,LOW); // Give a logic-Low level output
}
}
I have tried a few different options with regard to wiring but no glory.
I have included a pic as I think the pinouts might be.
Any help appreciated.
Greg
