LCD Question

[jadams]

I couldn't find the answer to this Q on a search or in 3 guides that I read.

I have an LCD (16x1) that has 16 connections along the bottom, and 2 connections on the side. Every guide I have read they only talk about 14+2.

Anyone have a diagram showing the wire placement for connecting to a parallel port?

Also, on the opposite side of the two connection spots, there is a spot for an LED (Says LED- and LED+ next to two holes). If I put an LED in there, is that for backlighting? And, would if have to go between the board and the LCD, or just sit next to it?

Thank ye,
Jeff.

 

[jadams]

Created a diagram...Hope it works

This is the back of the LCD

 

[frostmeister]

Hope this helps. It's for a 4x40 character display but is a 16 pin config with 8 data lines. Now all you got to do is get a paralell pinout and then whip out yo' soldering iron. Let us know how it goes - I'm thinking of getting an LCD for my rig...

LCD pinout

There ya go...

 

[jadams]

Cool!! Thanks alot! Hope it works


Jeff.

 

[jadams]

What about an LED? Do you guys think I can just attach any old LED and it would work? (Course I would attach the 17 and 18 pins) Would I need a resistor?

Thanks!
Jeff.

 

[frostmeister]

The LED is usually an integral part of the display; they're usually an array of 4 or so LED's soldered onto the circuit board pointing under the actual LCD so that they provide a backlight. It looks like they are connected to the 17 and 18 pins and would therefore just need a dropper resistor from the 5volt rail of your power supply. Oh yeah, and I found another link to more LCD information.

more info

Happy modding chap

[edit] The link I just posted gives different information on the pinout; They vary slightly - enough to cause a few problems when wiring up. It might be a good idea to see if you can figure out some of the pinouts manually to correlate to one or other of the diagrams; See if you can find a capacitor across power supply rails going to certain pins / lines labelled D0-D8 or something similar. Just a thought... [/edit]

 

[jadams]

Looks like alot of good info. Thanks!