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My LCD project does not work

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STEVE_J
Posts: 2
Joined: December 5th, 2005, 9:45 pm
Location: Romania
Contact:

My LCD project does not work

Post by STEVE_J »

I bought a 2x16 chars display, named DEM16216 with 14+2 pins, like in your schematic. First line on display is on permanently, when i powered the lcd, but nothing appears when I start LCD smartie. I selected the Parallel mode, i selected 2x16, but..... I followed exactly the schematic found on net.... Why does not work? I use win xp sp2. I installed port95gt.
I also see the datasheet of my display, and the configuration of pins is identicaly like in the schematic i used to. Can anyone help me??
Thank you very much. I really want to make the project work, cause is very interesting.
penjuin
Hardware Genie - Plugin Author
Posts: 42
Joined: June 28th, 2005, 3:42 am
Location: Australia

Post by penjuin »

Do you have more then one parallel port? Did you ground the R/W pin? Have you triple checked your wiring? Try looking here and see if you have done the same thing as on the site. If all else fails, desolder and do it all again using that guide.
STEVE_J
Posts: 2
Joined: December 5th, 2005, 9:45 pm
Location: Romania
Contact:

THANK YOU VERY MUCH

Post by STEVE_J »

Thank you very much! You really helped me with your message. I soldered wrong wires. Now is working. Thank's again!
penjuin
Hardware Genie - Plugin Author
Posts: 42
Joined: June 28th, 2005, 3:42 am
Location: Australia

Post by penjuin »

Glad I could help! Just for the sake of everyone else here are some of my debug tips for LCDs:

If you get smoke or it smells like it's burnt:
Throw it in the bin, you have destroyed it :(
Make sure it isn't the smell of solder :wink:

If you get the black line/s but cannot send data:
Make sure that the E, RS and R/W are wired correctly
Try another piece of software

If you are getting garbage on the screen:
Make sure D0-D7 are wired correctly
Try another piece of software
Make sure you are running only one copy of Smartie

If all else fails:
Completely desolder and try again :wink:
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