Author Topic: LED Matrix Tutorial  (Read 4673 times)

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Offline airman00Topic starter

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Offline izua

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Re: LED Matrix Tutorial
« Reply #1 on: July 23, 2008, 05:44:09 AM »
ouch, shift registers can't supply a lot of current XD
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Offline airman00Topic starter

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Re: LED Matrix Tutorial
« Reply #2 on: July 23, 2008, 05:55:36 AM »
what do you mean?

enough current for what application? For a matrix of LEDs they are fine , but anything else they are probably not enough.
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Offline izua

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Re: LED Matrix Tutorial
« Reply #3 on: July 23, 2008, 06:19:18 AM »
they say +-10mA (source/sink) in the datasheet i have. maybe some other 74XX spec will have a different power rating.
However, notice the dim lights in the second picture ^^
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Offline airman00Topic starter

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Re: LED Matrix Tutorial
« Reply #4 on: July 23, 2008, 08:52:58 AM »
they say +-10mA (source/sink) in the datasheet i have. maybe some other 74XX spec will have a different power rating.
However, notice the dim lights in the second picture ^^

they are dim because they are running at 1/8 duty cycle . Read the link I posted for more info. If you want them brighter just run them at 7/8 duty cycle or something like that , lol .
Check out the Roboduino, Arduino-compatible board!


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