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'[PIC]: PIC AND ULTRABRIGHT LEDS'
|----- Original Message -----
From: "Vic Lopez" <NETWORLD.COM> lopez
To: <MITVMA.MIT.EDU> PICLIST
Sent: Wednesday, June 26, 2002 1:54 PM
Subject: PIC: PIC AND ULTRABRIGHT LEDS
> Hello Friends,
> I am planning on working on a project that involves a pic 16F84
> controlling ultrabright LEDS. I know these leds require more voltage (
> and I assume more current). Do you have any advise on how to appraoch
> the PIC/LEDS interface? Off course, I'd be using the I/O pins of ports
> A and B. Thanks for any suggestions. Vic
Depends on the the implementation.
Will each pin be driving a single LED, or will
they be arranged in a matrix?
What are the current and forward voltage
ratings for these LED's?
Are you running the LED's off a +5Volt supply,
or some other voltage?
Is there the possibility that ALL LED's will be
lit at once, or will only one at a time be lit?
Will the LED's be full-on, or modulated?
If modulated, what is the approximate
duty cycle and frequency?
How many LED's, and would you prefer
discrete transistors or packaged drivers?
Is there a data sheet for these LED's, and
have you read it?
Is there a data sheet for the PIC16F84, and have
you read it?
Is there a good reason to use a 16F84, and not
a more capable, more current, less expensive
What is the current life expectancy of the question
mark key on my keyboard?
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I fixed this one.
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