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'[PIC]: Current for an LCD'
2000\12\28@133401 by Chris Pringle

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Hi All,
How much current does and LCD segment take? I want to connect about 25 LCD
connections to one pin of an LCD. Is that too much current for the PIC?

Regards,
Chris Pringle

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2000\12\29@091730 by mike

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On Thu, 28 Dec 2000 18:32:30 -0000, you wrote:

>Hi All,
>How much current does and LCD segment take? I want to connect about 25 LCD
>connections to one pin of an LCD. Is that too much current for the PIC?
>
>Regards,
>Chris Pringle
Almost nothing. LCDs are essentially capacitive, so 25 segments will probably have a
few nF of capacitance, but that will only cause a small current
transient when the signal changes during the AC drive changeover - as
long as the supply is suitably decoupled this should not be a problem
- 100R in series will reduce the transient if it causes noise
problems. This will be not problem for a PIC.

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