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LED Dot Matrix Display Question

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davyjcrow

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dot matrix display

Hi there,

New to the forum and was wondering if anyone can help out with a project that I am planning.

Using a 5x7 LED matrix I would like to build a circuit that utilises only a 4x5 area of the matrix to display an alphanumeric character. The idea would be to display a single character (specifically 1-9 and A-D) by applying power to a separate lead for each character. I am trying to avoid computer control if possible.

Does anyone have any suggestions on how this could be put together - apologies if this is kind of a basic question but I have never worked with matrices before and thus am unsure as to how they are driven.

Any help much appreciated, davyjcrow
 

daviddlc

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led dot matrix

You can use logic circuits, but it will be really complex and or robust, I will suggest a small microcontroller.
 

davyjcrow

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led dot matrix display project

Hi,

Thanks for the reply. I thought as much that any logic circuits would be too complicated to implement. Would it be any less complicated if I were to use the full 7 x 5 characters - is there an IC that has this information pre programmed?

Could I also ask what exactly you mean by a microcontroller - do you mean computer connection, or is this a kind of IC?

Regards

David
 

daviddlc

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how to display a character on led matrix

Microcontroller is an IC:

http://en.wikipedia.org/wiki/Microcontroller

Nowadays there are small controllers you can use for your application, they need to be programmed using a computer, but you mention you are trying to avoid computing stuff.
 

davyjcrow

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led matrix display

Thanks for the clarification.

I wouldn't mind connecting a microcontroller to a computer to program it initially, it's just that I wouldn't want to have it permanently connected to the computer during operation as I am already interfacing other hardware from the computer as well.

Could you suggest a site where I can get more information on programming microcontrollers for this kind of application?

Thanks
 

rajeevavr

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davyjcrow said:
Hi there,

New to the forum and was wondering if anyone can help out with a project that I am planning.

Using a 5x7 LED matrix I would like to build a circuit that utilises only a 4x5 area of the matrix to display an alphanumeric character. The idea would be to display a single character (specifically 1-9 and A-D) by applying power to a separate lead for each character. I am trying to avoid computer control if possible.

Does anyone have any suggestions on how this could be put together - apologies if this is kind of a basic question but I have never worked with matrices before and thus am unsure as to how they are driven.

Any help much appreciated, davyjcrow
 

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