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Help on ULN2003A, ULN2803 and LED matrix

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RollingEEE

RollingEEE

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uln2803 led

I want to drive an 8 x 8 LED matrix display with the help of 1-2 ULN2003A, 1 ULN2803 IC. I can do the programming microcontroller and use 2 8 pin ports. How do I connect the matrix and the buffers?
 

uln2803 led matrix

i would suggest ULN2803, coz it contains 8 current drivers so overall u'll need 2 uln to for this. Most of the 8x8 LED arrays will have 16 pins( 8 anode connection and 8 cathode connection) by giving proper signal u can glow a particular LED.
Buffer must be placed between ULN and controller in order to protect the controller. By giving corresponding signal to ULN it will make its output High or Low, through which u can make the LED glow.

Any more clarification mail me.
 

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