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'[PIC]: Current for an LCD'
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?
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On Thu, 28 Dec 2000 18:32:30 -0000, you wrote:
>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?
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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