Densitron

alon_na · 10-12-2001, 09:37 AM

Hi,
Last week, I bought two "Densitron HC4857FGY-LV0094" or "95" I'm not sure because one sticker says "5" and the one underneath says "4".
Anyway. Does any one know the Right way to wire this?
Also does anyone know which LCD this is.
It’s from TIMELINE, and they just don't know what there talking about.
Thanks,
Alon

milesg · 10-12-2001, 04:55 PM

There has already been a heated discussion about this issue... Please read this thread:
http://www.mp3car.com/cgi-bin/ultima...c&f=7&t=000385

If you have any trouble, I'd be glad to help... I've gone through 3 of these trying to figure it out, and now I've finally got it

-Miles

[ 10-12-2001: Message edited by: milesg ]

Ryan_Seibert · 10-12-2001, 11:02 PM

Hey Alon, i recently bought the same timeline lcd, and when i recived mine the positive and negative wires for the led backlight were disconnected and i can not find anywhere on the web where it shows which wire goes where. Can you look at your lcd and tell me which is the positive and negative terminal....thanks!

SuperMatty · 10-13-2001, 12:16 PM

I would just like to reinforce the facts. I just got back my replacement Timeline Densitron 40x4 LCD yesterday, and wired it up using Nathan Stuart's diagram and it worked perfectly.

Jawbreak · 10-13-2001, 01:49 PM

For SuperMatty and milesg, where did you guys get your pots from and do you have the part numbers? thanks

Jawbreak · 10-13-2001, 01:51 PM

Also about the ribbon attached how do you know which hole corresponsed to which pin?

milesg · 10-13-2001, 03:12 PM

Ryan_Seibert The terminal marked "A" is the Anode (positive). The terminal Marked "C" is the Cathode (Negative).

SuperMatty That's great! Glad to hear it.

Jawbreak I just went to the local electronic store and got my pots there. Even radio shack should have the 10k Pot. For the 100 Ohm pot, My friend used a 1k pot and it worked fine, but it was really sensitive.

About the ribbon cable, I removed mine and replaced it with an IDE header type pin block. This is how it used to be:
Red Wire = Pin 16
Then it goes in order all the way to pin 1 which is at the opposite edge of the ribbon.

I hope this helps you guys. I'll post more info on my LCD installation later(I'm making it detachable). Let's just say that I've found a use for the "un-used" pin 16

-Miles

Ryan_Seibert · 10-14-2001, 10:03 AM

Hey Milesg, since im not to coordinated with the A" is the Anode (positive). The terminal Marked "C" is the Cathode (Negative)type of thing, and anyways, i cant find anywhere on the lcd where it says that, say that i am looking down at the lcd, with the ribbon cable on the right side, can you tell me on the opposite side ( the side with the power for the led) whether the red or black power cable goes on the top or the bottom?? Any help would be gretly appreciated! Thanks!

milesg · 10-14-2001, 03:08 PM

Hey, sorry to confuse you...

First off: you're looking at the thing upside-down

hehe, the cable should be on the left if you're looking at it's face (or at least that's the way my last 3 LCDs were).

okay, so here it is:

______ | --------------- |C
Ribbon | LCD Screen Face |
------ |_________________|A

I hope this font works.
If not, then the Cathode is on top when the ribbon is on the left, and you're looking at the face of the LCD.

Good Luck,
-Miles

hmmm... Exactly as I planned

[ 10-14-2001: Message edited by: milesg ]

Ryan_Seibert · 10-14-2001, 10:33 PM

Sorry for my stupidity milesg, but your diagram did work

Everything seems to but working great, i wired it tonight. Thanks for the help!

alon_na · 10-21-2001, 09:05 PM

I still don't get it.
Do i have to make a board with 18 pin to 25 pin and have "potensiometers" in the middle.
I thought I could connect them direct.
if any one has done this with THIS lcd can you post some pics.
Thanx
Alon

SuperMatty · 10-21-2001, 10:07 PM

I connected my contrast pin directly to ground so I would have full contrast and it worked great. The backlight however, is not designed on this model to be used without resistance. If you want to have it be as bright as possible without overheating, you are advised to put approximately 2.3 Ohms of resistance on the backlight, for me this was 2 1-ohm resistors wired in series. Works great. Very bright but not hot.

lstrunk · 10-22-2001, 06:00 AM

NEVER, EVER buy from Timeline. They are nothing buy jerks, the guy wouldn't give me any tech support ( I only called once),
And they buy there prodects from wierd places. Those Densitron LCDs came from a respritory company (try to call Densitron for help, they won't cause its licensed by the respritory company, they just make them)

alon_na · 10-25-2001, 05:28 PM

too late.
but now do i have to build a circut board???
what are the order of the pins?
1 9
2 10
3 11
4 12
5 13
6 14
7 15
8 16

?????