low pin, high led, full control ? - Electronic Circuits Projects Diagrams Free

toprank · 3rd September 2008, 04:40 PM

I was reading about charlieplexing and it dose not give full control over LEDs.

anyone here know if multiplexing will give full control?

looking for something that takes Low amount of pins, high amount of LEDs and full control over the LEDs.

Pommie · 3rd September 2008, 04:46 PM

Charlieplexing does give full control if, by full control, you mean you can switch any LED on and off at any time and have any combination of LEDs illuminated.

What do you call full control?

Mike.

toprank · 3rd September 2008, 05:00 PM

in an article I read..

"Disadvantage of Charlieplexing

Only certain sets of LEDs can be turned on at the same time."

Quote:

Originally Posted by Pommie

Charlieplexing does give full control if, by full control, you mean you can switch any LED on and off at any time and have any combination of LEDs illuminated.

What do you call full control?

Mike.

Pommie · 3rd September 2008, 05:12 PM

Quote:

Originally Posted by toprank

in an article I read..

"Disadvantage of Charlieplexing

Only certain sets of LEDs can be turned on at the same time."

A charlieplexed display is the same as any multiplexed display, you can only light certain combinations of LEDs at one time. However, the combinations are cycled through so fast that to the human eye it looks like all LEDs are lit at once.

It's a bit like a television where at any one time only 1 individual point is lit.

Mike.

toprank · 3rd September 2008, 05:17 PM

whew.. that is good news!

Quote:

Originally Posted by Pommie

A charlieplexed display is the same as any multiplexed display, you can only light certain combinations of LEDs at one time. However, the combinations are cycled through so fast that to the human eye it looks like all LEDs are lit at once.

It's a bit like a television where at any one time only 1 individual point is lit.

Mike.

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3rd September 2008, 04:40 PM	(permalink)
toprank	low pin, high led, full control ? I was reading about charlieplexing and it dose not give full control over LEDs. anyone here know if multiplexing will give full control? looking for something that takes Low amount of pins, high amount of LEDs and full control over the LEDs.

3rd September 2008, 04:46 PM	(permalink)
Pommie	Charlieplexing does give full control if, by full control, you mean you can switch any LED on and off at any time and have any combination of LEDs illuminated. What do you call full control? Mike.