Circuit Between Two 8*8 LED Matrices to Make a 16*8 LED Matrix (Part 2 of 13)

Friday 12 September 2014

Circuit Between Two 88 LED Matrices to Make a 168 LED Matrix (Part 2 of 13)

by realfinetime | in LED Matrix at 02:22

Connection between 8*8 LED matrices

Cathode pins of both LED matrices are shorted (at the middle of LED matrices). If the cathode pins are shorted, only twenty four control pins will be remaining. They are sixteen anode pins (16, 15, 11, 3, 10, 5, 6, 13) and eight cathode pins (4, 7, 2, 8, 12, 1, 14, 9). Anode pins of LED MATRIX 1 is connected to the Q0-Q7 pins of 1^st 74595. Similarly, anode pins of LED MATRIX 2 is connected to the Q0-Q7 pins of 2^nd 74595. Cathode pins are connected to the Q0-Q7 pins of 3^rd 74595. Current limiting resistances of 100 ohm should be connected in series with the anode pins of LED matrices.

Connection between LED MATRIX 1 and 1^st 74595

From the circuit, it is clear that anode terminals of LED MATRIX 1 is connected to the Q0-Q7 pins of 1^st 74595 through current limiting resistors of 100 Ohm each.

Connection between LED MATRIX 2 and 2^nd 74595

From the circuit, it is clear that anode terminals of LED MATRIX 2 is connected to the Q0-Q7 pins of 2^nd 74595 through current limiting resistors of 100 Ohm each.