Free Project - 245 LED Display

[Pic_User]

Hey Trent,

Thanks for the nice upload. You have included a lot of detailed information. We can learn a lot from the project. Interesting.

-Adam-

[T.Jackson]

I have also included a copy of the draft article - contains a modest amount of technical theory for the project. Sorry if some of you find it to be a bit of a hard read, it hasn't been proof read or edited, only been read by myself once or twice. In a technical sense I believe it to be accurate however.

I do sincerely hope that someone finds the project of interest, quite a fair bit of my time was poured into its development. The software was written in a matter of just a couple of days, but the overall hardware design did take some considerable time. It was intended to be published as a full scale project in the Silicon Chip magazine. Unfortunately however it won't ever go to print. Too expensive to build, too quirky to assemble, for a project like this to be successful it needs a double sided through-hole plated PCB a long with LED modules - not 245 individual LEDs.

All told, to make matters even more difficult, you can buy something like this pre assembled for under $100. It's just never gonna be this cheap for a KIT. But on the flip side of the coin, there is a nice learning aspect with building a big and useful project like this.

Trent Jackson

[Dazheng]

Hi Trent Thank you very much for posting your project. Its verrrry interesting project and I want to build one for myself.

[T.Jackson]

It's definitely worth building. Wish I still had my prototype. It was never returned to me.

[T.Jackson]

Turns out I will be getting my prototype returned, so I can offer technical support to those keen on building it.

[precision]

I build this circuit with only one 5X7 led display ( Col 1,2,3,4,5 ), But not working. Is it necessary to built all 7 display ?

[T.Jackson]

I build this circuit with only one 5X7 led display ( Col 1,2,3,4,5 ), But not working. Is it necessary to built all 7 display ?

Can you be a bit more specific - what exactly have you done & what's not working?

As is, without great modification, it would be next to useless with just 35 LEDs.