8/3/2019 LED Scolling Dot Matrix

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LED Scolling Dot Matrix with pc interfacing toupdate message

If you are into geeking it out with projects of the electronical

kind, then you have likely wanted to create a dot matrixdisplay.

Use of fonts.exe

 This exe files can be used to generate a 7*5 (7 rows*5 column)

fonts size pattern in hardware I use 8*8 piece but on that apply

a 7*5 font display because it looks pretty but any one can

change it according to demand.7*5 normally a standard font

size also.

In the above diagram row 6,7 and 8 has code 00h mean nodisplay by using 8*8 just one 00h is used if use three 00h the

gap is seems too much between two characters.

Below is the screen shot of fonts.exe that how I use it, it has

many formats and option to do as I check three boxes and then

generate a fonts pattern code.

8/3/2019 LED Scolling Dot Matrix

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Dot matrix internal structure:

8/3/2019 LED Scolling Dot Matrix

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U can verify it by that pieces ur using to verify that it has same

or not

In the above diagram rows are supplied by 5 volt and ground

provided at column then led glow.

I am using the same pieces it is called common cathode

configuration.

Here r some detail in diagram below

8/3/2019 LED Scolling Dot Matrix

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Features of project:

1) Message readed from EEPROM

2) Message remain in EEPROM after power failure no need

to update again

3) Message can be updated

4) Maximum 200 characters are allowed

5) GUI in visual basic to send message using serial port

6) Serial interfaced with pc