Code?

So with a 5v supply maybe 12 at a push what is the best way to power 256 ir led's? all with the same signal a pwm signal. After much head scratching and taking apart a 60 led torch to find all led in parallel and one resistor, i decided on a constant currant led driver and to put them in groups of around 700ma(what the driver is rated at). Now the led are rated at 20ma maybe more for pulsing, i have them running at around 10ma. My thought was an i think i'm wrong now was that at that currant there would be no heating and no thermal runaway.

How else could i  power them?

I would have thought the range of Bluetooth was well within the size of most studios.

Does it have to be wifi? Blue tooth would be cheaper i think and easier to setup. No problem with controlling from android or iphone. You could still have internet control as well your app could connect to the internet.

I solved it, it needs a delay in the setup. That seemed to do it.

I have tested this code successfully on the Ardunio Mega.

Code:

void setup()
{
  Serial1.begin(9600);
  backlightOn();
}

void loop()
{ 
  selectLineOne();
  Serial1.print(millis());
  selectLineTwo();
  Serial1.print(millis()/2);
  delay(100);
}

void selectLineOne(){  //puts the cursor at line 0 char 0.
   Serial1.write(0xFE);   //command flag
   Serial1.write(128);    //position
   delay(10);
}
void selectLineTwo(){  //puts the cursor at line 0 char 0.
   Serial1.write(0xFE);   //command flag
   Serial1.write(192);    //position
   delay(10);
}
void goTo(int position) { //position = line 1: 0-15, line 2: 16-31, 31+ defaults back to 0
if (position<16){ Serial1.write(0xFE);   //command flag
              Serial1.write((position+128));    //position
}else if (position<32){Serial1.write(0xFE);   //command flag
              Serial1.write((position+48+128));    //position
} else { goTo(0); }
   delay(10);
}

void clearLCD(){
   Serial1.write(0xFE);   //command flag
   Serial1.write(0x01);   //clear command.
   delay(10);
}
void backlightOn(){  //turns on the backlight
    Serial1.write(0x7C);   //command flag for backlight stuff
    Serial1.write(157);    //light level.
   delay(10);
}
void backlightOff(){  //turns off the backlight
    Serial1.write(0x7C);   //command flag for backlight stuff
    Serial1.write(128);     //light level for off.
   delay(10);
}
void serCommand(){   //a general function to call the command flag for issuing all other commands   
  Serial1.write(0xFE);
}

However it doesn't seem to work on the Arduino Due. I get a serial signal but it's just junk text. I'm using a ttl level converter to go from 3.3 to 5. Is their a software reason?
Cheers.

I used the laser toner transfer method for pcb manufacture it was ok but what i also tried at the time was ironing the component image layer on the other side. I did it in exactly the same way, a very light run with pcb abrasive bloc, a clean with acetone and then ironed the printed magazine onto the non copper side (lined up first). It worked well enough, maybe not as strong as the real thing but it didn't come of. Of course the image was black so quite as easy to see but better than nothing.

I like it and can defiantly see a use for it. The only thing i'd like to see is 6 buttons perhaps instead of three and maybe a couple of little led's some were under the screen a green one and a red one for power indicators or such like. Maybe colour one of the buttons red and another green as well.

Cant you just look at the libraries your using. In their folder is a .h file and a .cpp file you can open them in a text editor or notepad2 is good. Sometimes you will need to to reconfigure them.

Controlling a VST eq would be relativity trivial and you should look for stuff on connecting pots to the arduino and then sending midi from the arduino (at a guess your looking for continuous controllers). All of this will be easy to find. Controlling any kind of eq is more tricky.

If the time capsule is buried in the ground then there is the possibility of using a heat pump coupled with some novel alloy and neodymium magnets?

http://en.wikipedia.org/wiki/Geothermal_heat_pump

http://www.popsci.com/technology/article/2011-06/new-alloy-can-convert-heat-directly-electricity


 

Old style LCD displays (clocks and stuff like that) sometimes have layers of polarized plastic sandwiched between the glass lcd display. If you hold the bit's of plastic up to the light and rotate them it go's from transparent to black. You can hook a LCD to an arduino and see it work you can also experiment with polarized plastic. I could be wrong here but isn't the polarization of light a quantum level effect.

Have been moving a project from the Mega to the Due. It uses Easy Transfer. It didn't compile. Happily i solved the problem. I'm sure the more competent could have done this and/or don't use Easy Transfer. However if you do use it and cant figure it out this is what to do.

(It might be the case that it's not working fully i don't know, it works for what i use it for)

Find these in EasyTransfer.h

Code:

//#include <math.h>
#include <stdio.h>
#include <stdint.h>
#include <avr/io.h>

comment them out and it seems to work i don't think it needs them.

This might be a useful analogy.

http://en.wikipedia.org/wiki/Additive_synthesis

I use this a lot.

http://www.hebeiltd.com.cn/?p=zz.led.resistor.calculator