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1  Using Arduino / LEDs and Multiplexing / is arduino uno r3 feasible enough to make a 8x8x8 led cube? on: October 14, 2012, 10:24:47 pm
I've read some online post on shift registers and find out each shift resigster like 74HC164N controls 8 leds, while 3 pins are used on arduino uno. so if i  build a 8x8x8 led cube, that would require a total of 72 pins to control them. in this case, i can only use up to 4 shift registers because arduino uno have to give 3 pins to each shiftregister. and 4X8 is only 32 ouputs.
2  Using Arduino / LEDs and Multiplexing / is arduino uno r3 feasible enough to make a 8x8x8 led cube? on: October 14, 2012, 10:24:31 pm
I've read some online post on shift registers and find out each shift resigster like 74HC164N controls 8 leds, while 3 pins are used on arduino uno. so if i  build a 8x8x8 led cube, that would require a total of 72 pins to control them. in this case, i can only use up to 4 shift registers because arduino uno have to give 3 pins to each shiftregister. and 4X8 is only 32 ouputs.
3  Using Arduino / LEDs and Multiplexing / Where do i find the schematic for 2x2x2 led cube? on: October 13, 2012, 02:18:18 pm
and how do i control transistors through programming?
4  Using Arduino / LEDs and Multiplexing / Re: how come the 3rd and 4th leds emit little light? on: October 12, 2012, 11:51:13 pm
thank you!!
5  Using Arduino / LEDs and Multiplexing / how come the 3rd and 4th leds emit little light? on: October 12, 2012, 11:47:26 pm
i have 4 leds connected to 4 different ports and one common GND, first 2 leds work perfectly fine but once it gets to the third and fourth led, they seem to have low electric current flowing through them...
6  Using Arduino / LEDs and Multiplexing / how come the 3rd and 4th leds emit little light? on: October 12, 2012, 11:47:13 pm
i have 4 leds connected to 4 different ports and one common GND, first 2 leds work perfectly fine but once it gets to the third and fourth led, they seem to have low electric current flowing through them...
7  Using Arduino / General Electronics / Re: how am i going to use transistors to control the the current for each layer? on: October 11, 2012, 10:10:42 pm
oh, thanx, i now have a sense of what to do now, okay, so my last question is that how do i connect the transistor to the cathode on the second layer? and how i control the transistor to be on and off(sorry for being a noob.), through programming?
8  Using Arduino / General Electronics / how am i going to use transistors to control the the current for each layer? on: October 10, 2012, 10:21:54 pm
i wanna build a 2x2x2 led cube on my breadboard. i currently have uno, some leds, soldering iron and some jumper wires. i read some post online saying that i have use transistors for each layer, i wonder how that works because i don't see any transistor on top of each layer.
9  Using Arduino / Microcontrollers / what are the materials that i need for a 8x8x8 led cube? on: October 09, 2012, 02:03:01 pm
i will first experiment with a 3x3x3 led cube, i currently have an arduino uno r3 board, and i know that in order to make a led cube, i know that i will need to have some kills on soldering and c. but what are the specific materials to build one and how is the cube going to work?
10  Using Arduino / Programming Questions / Re: how can i fix the following code? on: October 07, 2012, 01:53:31 pm
int led1=13;
int led2=12;

int led1state=HIGH;
int led2state=LOW;


void setup()
{
  pinMode(led1, OUTPUT);
  pinMode(led2, OUTPUT);
}

void loop()
{
digitalWrite(led1,led1state);
delay(1000);
digitalWrite(led1,led1state=LOW);
delay(1000);
if (led1state=LOW)
{
  led2state=HIGH;
  digitalWrite(led2,led2state);
}

}

here is the new code, i still don't know why it doesn't work.
11  Using Arduino / Programming Questions / how can i fix the following code? on: October 07, 2012, 01:45:24 pm
int led1=13;
int led2=12;

int led2state=LOW;

void setup()
{
  pinMode(led1, OUTPUT);
  pinMode(led2, OUTPUT);
}

void loop()
{
digitalWrite(led1,HIGH);
delay(1000);
digitalWrite(led1,LOW);
delay(1000);
if (led1==LOW)
{led2state==HIGH;}
}



i am trying to write code that when one led is on the other becomes off, and vice versa.
12  Using Arduino / Programming Questions / how come there is no enough amount of current flowing to 2nd led? on: October 07, 2012, 01:10:11 pm
one led or more than one led to one pin always work, but whenever i try to connect another led to another pin(i.e 12). the light emitting by the led is so little. here is the image.

13  Using Arduino / Programming Questions / how do i control the on and off of the different leds all from port 13? on: October 07, 2012, 11:08:39 am
i''ve connected 6 leds to the breadboard all powered by the current from 13. but i don't know how to set each individual on and off (other than just connecting 6 leds to different ports,13,12,11....). is there a way to do it through programming? because i am looking forward to building 8x8x8 led cube.
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