Im currently building a project using an Uno board in which i have 8 led's in a row and require them to cycle through a message in binary.
the leds are on pins 2 through 9
so if i wanted to have the leds spell arduino i would want it to cycle through the following (where 0 is off and 1 is on and between each letter a delay) :
If you want just write "Arduino" you can simple turn on/off each LED and add a delay.
int led7 = 9;
...
int led0=2;
void setup() {
pinMode(led7, OUTPUT); // initialize the digital pin as an output.
...
pinMode(led0, OUTPUT);
} //End of setup
void loop() {
// 01100001
digitalWrite(led7, LOW);
digitalWrite(led6, HIGH);
digitalWrite(led5, HIGH);
digitalWrite(led4, LOW);
...
digitalWrite(led0, HIGH);
delay(1000); // wait for a second
//and the others
} //End of loop
You can do this also by an Array or very flexible by ASCII-Code from a String.
A few weeks? I think this is what you want. Copy the code below and run the sketch. Enter your text into the serial monitor. Study this example until you can do it for yourself.
// LED binary display with 8 LEDs using serial monitor input
// Tom Fangrow, August 5, 2012
int i; // counter used to switch pins
void setup() {
Serial.begin(9600); // open serial port at 9600 baud
for(i=2; i<10; i++) { // for LEDs on pins 2 thru 9
pinMode(i, OUTPUT); // set each pin for output
}
}
void loop() {
if(Serial.available()) { // if anything on port
byte c = Serial.read(); // read character
for(i=2; i<10; i++) { // while there is data remaining
digitalWrite(i, c%2); // display the least significant bit
c /= 2; // move to next significant bit
}
delay(1000); // look at character for 1 second
}
}
(code edited slightly a few minutes after posting)
Basically you attempt with 8 LEDs what I did with 20 LEDs. So maybe you fill find my POV code helpful. POV Reloaded | Blinkenlight. It should not be to hard to adapt this to 8 LEDs instead of 20.
You want "write" arduino on a row of eight leds using binary? I dont quite understand hiw you expect to relay letter infirmation through eight bit binary. You could do it with a minimum of 20 leds if you want to clearly illuminate an led version of the word "arduino".
Could you elaborate a bit more? I'm clearly missing something