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multiplexing with u12

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#1 ingram010

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Posted 29 January 2013 - 04:47 AM

Hi All I have a project which involves multiplexing 400 LED's and I wondered if it would be possible to do it with the U12, any advice would be appreciated. Many thanks John

#2 LabJack Support

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Posted 29 January 2013 - 08:55 AM

If you need individual control of any combination of LEDs, then you would need 400 bits of DO. Our devices typically have ~20 DIO, so you would have to use I/O expander chips to get more. You might be able to attach enough addressable I2C chips to get 400 I/O. If you just need to turn on one LED at a time, then you need 9-bits of I/O to control 512 LEDs with multiplexers, so that is possible with lots of wiring.

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