arduino/IR_Jammer/IR_Jammer.pde

   1 /*
   2  * Arduino IR-Jammer
   3  * <~~Harvie 2oo8
   4  *
   5  * You can look for couple of old TV remote controlls
   6  * to extract some IR LEDs...
   7  *
   8  * Each TV should have LED of specific "color"
   9  * (even you can't see it). So its better to connect
  10  * more LEDs with different light frequency (color).
  11  * Specialy if jammer is working only from small distance.
  12  *
  13  */
  14
  15 #define ledpin 13
  16 //Maybe you will have to experiment also with this value
  17 int bitlen = 5;
  18 int d;
  19 float i;
  20
  21 void setup() {
  22   pinMode(ledpin, OUTPUT);
  23 }
  24
  25 void loop() {
  26   for(d=1000/100;d<=1000/20;d++) { // 1000/frequency in kHz
  27   //You maybe have to experiment with ^^^ this ^^^ values
  28   //Frequency sweeping: 100->20 kHz works, i saw 60->1 too
  29     for(i=0;i<bitlen;i+=0.5) {
  30       digitalWrite(ledpin, HIGH); delayMicroseconds(d/2);
  31       digitalWrite(ledpin, LOW ); delayMicroseconds(d/2);
  32     }
  33     delayMicroseconds(d*bitlen);
  34   }
  35 }
  36