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How do you intend to use it? Like, do you plan to drive it on an external interrupt.
I could just suggest using a 4017 with 555 timer giving the pulse. You can use the same pulse as interrupt source to the microcontroller to generate the appropriate row driving voltage.
All o/p should be buffered with transistors.
I will try to tell you more as you give us the details.
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On second thought, you can eliminate the 55 and use a builting timer of the microcontroller to generate the interrupt and drive the 4017. (You can use an 8 bit counter with 8o/p's instead) Make sure you put o/p 8 of the 4017 to reset.
How do you intend to use it? Like, do you plan to drive it on an external interrupt.
I could just suggest using a 4017 with 555 timer giving the pulse. You can use the same pulse as interrupt source to the microcontroller to generate the appropriate row driving voltage.
All o/p should be buffered with transistors.
I will try to tell you more as you give us the details.
On second thought, you can eliminate the 55 and use a builting timer of the microcontroller to generate the interrupt and drive the 4017. (You can use an 8 bit counter with 8o/p's instead) Make sure you put o/p 8 of the 4017 to reset.
It's pretty easy if you already know how to do a basic program for a microcontroller.
All you gotta do is sit down and think about "what the sequence is" and put that into code
Before the first time I made one, I thought it was pretty complex too, but it all worked itself out sort-of. Just take it one small step at a time.
If you wanna go for a big display (something like 20 x 7 dots or more) you'd wanna combine a Demultiplexer to increase the number of 'columns' of LEds you intend on lighting up.
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