In need of LCDs EXPERT
 

I'm looking for someone who is proficient in electronics. I got a bunch of LCDs that I would offer to someone who would be able to figure out how to wire them to the PC and how to send basic code to them. I know C++ fairly well so i can go and write a program by myself but the only problem is that i cant get correct schematics for them LCDs.

i got several ones. I got 2 like this http://www.pjrc.com/store/mp3_display.html
1 medium
2 small

contact me if you can help.

I've built many interfaces, but not for LCDs.

From what I know though, they usually have a serial interface, and a basic set of commands (like "clear screen"). I have no idea what these codes are, but I'd try something off of the ASCII chart first.

i dunno but i know you can get them with serial attachments already on them at www.matrixorbital.com and i love there LCDs

LCD expert ehhh
 

Hey,

From the jist of what you have told me it would be hard to tell you exactly what to do (ie. I don't know exactly what you are working with). So, I wrote up some questions.

The first question is:
- find out if the LCD is interfaced with a independent circuit/harddrive (basically will it operate on it's own, or does it need info from another source)

The second question is:
- where is the comm. port(s)
- what kinda comm. port is it
- IDE/serial/usb/IEEE 1394(firewire)/ethernet(god I hope not)

From what I got out of the a few of those articles I read it was serial. This is where you would connect your PC to your LCD/circuit. (I'm doing something similar to this at work only I'm interfacing a keyboard with usb)

If your LCD is Compatible/or is the same one in the link you sent me I suggest taking a look at the links below. The upgrade link will link you to an application that you need to send that firmware. The firmware link has open source code (written probably in asm :eek: sorry not C++) that you can mess with (this is the stuff you send your device. It also has information on how to properly connect your pc to your LCD.

http://www.pjrc.com/tech/mp3/firmware.html
http://www.pjrc.com/tech/mp3/upgrade.html

I hope this helpz,

P.S. Plz reply I would like to know if you get it to work

Davis

I'm no expert, but I've wanted to do the same thing. There is a lot of info around on connecting an lcd to the parallel port to get the same info as the matrix orbital units but a lot cheaper. There is also some good freeware to avoid having to learn any code if you'd rather not. Check this out.
http://www.overclockers.com.au/techstuff/a_diy_lcd/
Wolfy goes through the whole thing step by step and gives links to sources for parts & software.

Sonixsos
Here, I found another good link I collected with lots of resources.
http://www.gideontech.com/guides/lcd/

mm