would this sketch be ok once i mod it ?
http://joesgizmos.wordpress.com/2012/07/06/twinkle-leds/


i'm getting in to multiplexing soon

hi all
i know the mega wich i have has got Digital I/O Pins   54 (of which 15 provide PWM output)
can i get all the 54 pins to twinkle an individual led like stars in the sky at night in a random pattern ??
or what would be the better alternative?

hi all
is it safe for me to say that i should use this circuit for all power mosfets IRL520 and small transistors such as the 2N2222A
I know R1 is current limiting
but what about R2/R3
is this just for safe measure ??
cheers
marko

thanks i thought you would say this lol i got some and ordering more now thanks was using irf520's but 2  expensive for what i need

try using a crimp ferrule on the and solder to that

this sketch works on my mega
can anyone see any errors with it ?

/*   Blink   Turns on an LED   This example code is in the public domain.  */ void setup() {                  // initialize the digital pin as an output.   // Pin 2/ has an LED connected on most Arduino boards:   pinMode(2, OUTPUT);   pinMode(3, OUTPUT);   pinMode(4, OUTPUT);   pinMode(5, OUTPUT);   pinMode(6, OUTPUT);   pinMode(7, OUTPUT); } void loop() {   digitalWrite(2, HIGH);   // set the LED on   delay(1000);              // wait for a second   digitalWrite(2, LOW);    // set the LED off   delay(0);              // wait for a second      digitalWrite(3, HIGH);   // set the LED on   delay(1000);              // wait for a second   digitalWrite(3, LOW);    // set the LED off   delay(0);              // wait for a second      digitalWrite(4, HIGH);   // set the LED on   delay(1000);              // wait for a second   digitalWrite(4, LOW);    // set the LED off   delay(0);              // wait for a second      digitalWrite(5, HIGH);   // set the LED on   delay(1000);              // wait for a second   digitalWrite(5, LOW);    // set the LED off   delay(0);              // wait for a second      digitalWrite(6, HIGH);   // set the LED on   delay(1000);              // wait for a second   digitalWrite(6, LOW);    // set the LED off   delay(100);    // wait for a second      digitalWrite(7, HIGH);   // set the LED on   delay(1000);              // wait for a second   digitalWrite(7, LOW);    // set the LED off   delay(100);     digitalWrite(3, HIGH);        digitalWrite(6, HIGH);   delay(50);   digitalWrite(3, LOW);        digitalWrite(6, LOW); delay(500);   digitalWrite(4, HIGH);        digitalWrite(5, HIGH);   delay(50);   digitalWrite(4, LOW);        digitalWrite(5, LOW);         digitalWrite(4, HIGH);      delay(100);                digitalWrite(4, LOW);      delay(100);              }

hi all
what would be the best Semiconductor to use for 5 Amp max
it is only to fade in and out a 5 watt led
5 watts = 0.41 amp
the cheaper the better
thanks
marko

thats acceptable 125ns but where would i put the code in the sketch ?

i'm using a mega
so what you are saying is use another pin to connect to both led's ?
am i right
and what is the best transistor to use for 2 amps

i tried this but one led lights up befor the other but i want them simultaneously

 digitalWrite(3, HIGH);     
  digitalWrite(7, HIGH);
  delay(50);
  digitalWrite(3, LOW);     
  digitalWrite(7, LOW);

how do i digital write 2 pins ?

hi all
i'm using this sketch to flash led's at the end of the sketch i would like to flash leds on pins 4 and 7 simultaneously can any one tell me if its possible and how to do it
thanks
marko


/*
  Blink
  Turns on an LED
  This example code is in the public domain.
 */

void setup() {               
  // initialize the digital pin as an output.
  // Pin 2/7 has an LED connected on most Arduino boards:
  pinMode(2, OUTPUT);
  pinMode(3, OUTPUT);
  pinMode(4, OUTPUT);
  pinMode(5, OUTPUT);
  pinMode(6, OUTPUT);
  pinMode(7, OUTPUT);
}

void loop() {
  digitalWrite(2, HIGH);   // set the LED on
  delay(1000);              // wait for a second
  digitalWrite(2, LOW);    // set the LED off
  delay(0);              // wait for a second
 
   digitalWrite(3, HIGH);   // set the LED on
  delay(1000);              // wait for a second
  digitalWrite(3, LOW);    // set the LED off
  delay(0);              // wait for a second
 
   digitalWrite(4, HIGH);   // set the LED on
  delay(1000);              // wait for a second
  digitalWrite(4, LOW);    // set the LED off
  delay(0);              // wait for a second
 
   digitalWrite(5, HIGH);   // set the LED on
  delay(1000);              // wait for a second
  digitalWrite(5, LOW);    // set the LED off
  delay(0);              // wait for a second
 
   digitalWrite(6, HIGH);   // set the LED on
  delay(1000);              // wait for a second
  digitalWrite(6, LOW);    // set the LED off
  delay(2000);              // wait for a second
   digitalWrite(7, HIGH);   // set the LED on
  delay(50);              // wait for a second
  digitalWrite(7, LOW);    // set the LED off
  delay(50);   
 
}

yes its just for the light sequence near the end

could this be feesable ???

hi all

i'm looking for a sketch for Close encounters of the third kind or somthing of the same kind a basic sketch would do as i can modify it myself any help would be appreciated could this be feesable ???
i dont need sound just the light sequence

cheers all
marko