[SOLVED] DOT MATRIX pinout for interfacing to a microcontroller

[jean12]

Hello there can you help me to identify the pins of an 8*8 led dot matrix for interfacing to a PIC,I connected like it is connected when doing simulation in proteus, I am getting wrong result I think it should be the pinout of a dot matrix.

Please help.

 

[jayanth.devarayanadurga]

Ask zuisti. Matrix display in Proteus is really confusing. If you flip and or rotate the display then it will be difficult to find which is row and which is column. Try giving multiple pins on one side +5V and one pin on the other side GND. If rows or cols of light up then you can consider depending upon the orientation of the matrix the single line which lits as row or col. If leds doesn't light then intergacnge just the power supply to matrix but don't change pin connections.

 

[jean12]

condider the pinout on this link ata tell me how I can connecton the 74LS164 or 74LS595https://circuitdesolator.blogspot.com/2010/12/led-dot-matrix-pin-configuration.html

It is very confusing.

 

[jayanth.devarayanadurga]

In read matrix it is not confusing but in Proteus it is confusing. I don't know whether the sides which doesn't have pins is taken as row or column. Use row scanning in the 3rd image of the link you posted.

Rows are anodes and if a 1 is given to a particular row then all the leds of that row will light provided all the cathodes (columns) are grounded. So the character you display will be scanned from top row to bottom row.

'A' is represented as

11100111  // row 1 data (columns 4 and 5 will light)
10011001
10111101
10111101
10111101
10000001
10111101
10111101  // row 8 data

first send the row 1 data to cathodes (columns) and then send 0x01 to rows (anodes) and the top row will turn ON. then a delay of 1 or 2 ms and turn off display. then send row 2 data to columns and then turn ON row 2 for 2 ms and then turn OFF and repeat for all the 8 row data. Finally repeat this whole process continuously.

 

[jean12]

but also the pinout when making the implementation is confusing.
have you tried with one?