Subject:
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Re: control large number of leds (?)
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Newsgroups:
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lugnet.robotics.handyboard
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Date:
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Sun, 29 Feb 2004 21:02:17 GMT
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Viewed:
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4830 times
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Wow, I thought this list was dead.
Hmmm. You're missing two key bits of information :
1) Do you want to individually control each LED's brightness?
2) How often do you wish to change the brightness?
If you are attempting to make a television like display its a lot harder
than if you're making simply a LED sign.
--Chuck
At 11:37 AM 2/29/2004, Claudia Bernett wrote:
> hi.
>
> i'm working in a project in which i'll need to control the brightness of about
> 700 leds. i've just begun to research solutions - and i'm not sure the hb is
> the right microcontroller for the job, but i thought perhaps an hb user on
> this
> list would have some relevant experience and could perhaps point me in the
> direction of the right hardware/software combination. it seems as though i'll
> need multiple microcontrollers, and additional hardware to manage the
> control of
> a large numbers of leds.
>
> the MAX6954 4-Wire Interfaced, 2.7V to 5.5V LED Display Driver with I/O
> Expander
> and Key Scan made by maxim-ic was suggested as a possibility - if anyone is
> familiar with it.
>
> http://www.maxim-ic.com/quick_view2.cfm/qv_pk/3410
>
> separate but related, i'll need the software running on the mc to be able to
> return the current time, down to seconds. i know system time is available on
> the hb, but gets reset everytime the device is rebooted. so - if there
> are any
> suggestions regarding a solution for this piece as well it would be much
> appreciated.
>
> thanks in advance,
> claudia
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Message has 1 Reply:
 | | Re: control large number of leds (?)
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| /* inc allows r bound and l bound(the search counters) to be increased with each cycle) */ float sleep time=.0075; print f("Neil Version 2.0n"); while(!start button()) while(!stop button()) light=analog(6); while(light<=VALUE) print f("On the white (...) (4 weeks ago, 20-Apr-24, to lugnet.robotics.handyboard, FTX)
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Message is in Reply To:
| | control large number of leds (?)
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| hi. i'm working in a project in which i'll need to control the brightness of about 700 leds. i've just begun to research solutions - and i'm not sure the hb is the right microcontroller for the job, but i thought perhaps an hb user on this list (...) (20 years ago, 29-Feb-04, to lugnet.robotics.handyboard)
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