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The 5x7 matrix is a common anode type LED display unit. A single matrix is formed by sixty - four LED's arranged in eight columns and eight rows (5x7). The anodes of the five LED's forming one row are connected together. Similarly, the cathodes of the eight LED's of a column are connected together. ..

The 8x8 matrix is a common anode type LED display unit. A single matrix is formed by sixty - four LED's arranged in eight columns and eight rows (8 x 8). The anodes of the five LED's forming one row are connected together. Similarly, the cathodes of the eight LED's of a column are connected together..

Based on the electrode connections, two types of LED matrices are explained below:An LED matrix with a common anode for LEDs in a row — when a row of LEDs feature a common anode, the LEDs in each column must include a common cathode.An LED matrix with a common cathode for LEDs in a row — when a row ..