Common Ground? How to Wire Up LCD? (Quick, simple question)
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I'm trying to wire up the following LCD to my parallel port:
The diagram they have provided here:
shows that pins 3 and 8 go to ground. Also, many of the parallel port
pins go to ground.
1. What is the purpose of that capacitor there? I mean, I've heard of
decoupling capacitors that smooth out power supply but this doesn't
look like it's placed that way. What is it for?
2. What does "GND" really mean? I know that I have to use two
batteries to power my LCD. I hook up pin 7 to the ( + ) and pins 3 and
8 to ( - ) with the capacitor in between for pin 8. Where do I connect
the parallel port pins labeled "GND" on that diagram to? Do I hook
them up to the ( - ) on the battery?
See also: www.piclist.com/techref/lcds.htm?key=lcd
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