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1  Using Arduino / General Electronics / MAX 7219 cwg problem on: March 21, 2011, 04:40:00 pm
I bought an MAX 7219 cwg but I realized that i can't use it in a breadboard because it's pins are very close and are not look down.
This is how it looks like :


Is there any way to use it?
Is there any base on which to apply the IC?
2  Using Arduino / LEDs and Multiplexing / Re: Shift registers or MAX 7219 on: March 21, 2011, 03:12:06 pm
It will possibly be a 16x16 matrix with one color and without pwm.
I don't know about Common cathode and common anode. I will make my matrix in a pcb with leds.
3  Using Arduino / LEDs and Multiplexing / Shift registers or MAX 7219 on: March 21, 2011, 02:32:28 pm
What do you think that is the best method to control a led matrix.
Do you think that is better to use shift registers like 74hc595 or MAX 7219?
4  Using Arduino / LEDs and Multiplexing / Re: max number of leds on: March 15, 2011, 08:40:11 am
Thank you CrossRoads.
That was very helpful.

The maximum current that i can draw from the 5V pin is 800 mA?
5  Using Arduino / LEDs and Multiplexing / Re: max number of leds on: March 15, 2011, 07:16:05 am
So i could use an NPN transistor and an external power supply in order to draw much lower current from the arduino?
6  Using Arduino / LEDs and Multiplexing / max number of leds on: March 12, 2011, 02:19:16 pm
I started to make some simple projects with leds using the 74hc595.
I use 8 leds per 74hc595 and each led has a 220Ω resistor.
At this time i have 2 74hc595 and 16 leds in the circuit and they are connected like this http://www.arduino.cc/en/Tutorial/ShiftOut.

I wonder if there is any limit in the max number of leds and 74hc595 i can use in order to protect arduino.

Thanks in advance.
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