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a prototype

A project log for 4014 LED minimodule

A cheap, small module that displays two 7-segments digits with simple multiplexing

AlexAlex 09/06/2016 at 16:344 Comments

In the file section you can now find my (al1's) AVR test code for rev0. To test this code I made this little quick prototype out of some prototype board and green 0805 SMD LEDs. It should be compatible to rev0.

With 0805 you can read it not good (should be much better with 4014 LEDs). This is a "12".

Discussions

Yann Guidon / YGDES wrote 09/06/2016 at 16:37 point

Thanks @al1 !
I just saw you uploaded some files :-)

Now, why not display 42 ? :-P

I'm goin to post more pictures very soon...

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Alex wrote 09/06/2016 at 16:50 point

I tried to get 42, but with only 200ms per number I always got 44 and 44 looks ugly.

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Yann Guidon / YGDES wrote 09/06/2016 at 16:56 point

"why" 200ms ?? with DYPLED I multiplex at 2.45KHz, this must be enough :-)

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Alex wrote 09/06/2016 at 17:01 point

200ms is the delay in the test loop. It goes like 

"01" - 200ms delay "02" delay .. and so on. 

To be honest it counts up quite fast. For multiplexing I used a ~980Hz timer

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