Re: 5x7 LED matrix fixed display
- From: Spehro Pefhany <speffSNIP@xxxxxxxxxxxxxxxxxxxxxxx>
- Date: Sat, 25 Jun 2005 09:26:29 -0400
On Sat, 25 Jun 2005 09:41:34 +0200, the renowned mmm <pippo@xxxxxxxx>
wrote:
>Englishman in Ankara wrote:
>> Maybe I'm trying something too simple, but I couldn't find what I need
>> on the 'net...
>>
>> I want to display a fixed message on a 5x7 matrix LED panel. Actually a
>> few (6 or 7) side by side.
>>
>> The only circuits I can find are for SCROLLING displays.
>>
>> Is there a simple way of driving a multiplexed LED display? maybe using
>> simple logic not PIC or microprocessors.
>>
>> Any ideas would be appreciated...
>>
>
>
>maybe a bunch of shift register connect in a circular fashion can do the
>job, break the connection to load the new datas, plus some counters and
>decoders plus some mixed gates to connect all.
>
>but the question is :
>
>using discrete logic you need lot of chips, using a micro you put inside
> the micro the 'data memory' and the all logic to do the refresh and
>you need only the led drivers outside the micro.
>
>I tought that at slow speed micro almost always beat discrete logic, my
>pcb maker charge lot of money and a single micro is soooo small :-) !
Here's an example circuit and firmware using an older PIC type
microcontroller. Lewin used discrete LEDs but it would work fine with
an LED array.
http://www.zws.com/products/picxie2/index.html
.
- References:
- 5x7 LED matrix fixed display
- From: Englishman in Ankara
- Re: 5x7 LED matrix fixed display
- From: mmm
- 5x7 LED matrix fixed display
- Prev by Date: Re: STA013 problem
- Next by Date: Re: 5x7 LED matrix fixed display
- Previous by thread: Re: 5x7 LED matrix fixed display
- Next by thread: Re: 5x7 LED matrix fixed display
- Index(es):
Relevant Pages
|
