Electronics my very own lcd screen. But I need usb

Hi guys. I am looking into making my own lcd screen. But instead using a parallel cable I prefer using a usb cable. Is it possible?
Also, is it possible to display temperatures directly from thermistors? without the computer turned on. Let me know. thx

 

Yup! that's fully possible...

All you need is a PIC with a USB interface oer something similar... it does require a fair bit of skills though... (programming, designing and soldering..)

 

could i have some more details (links etc) on this?

 

Hey if you learn how tell me.Oh and were is a link were I could learn to make a lcd. Just to let you know I'm not stealing the thread

 

to make an LCD?!
not easy, go look for custom fabrication, and a lot of money.

As for USB adaption, well best bet is to get an LCD that has a serial interface, one thats very easy to get to work with RS-232 (Serial port on ur comp) and then get a USB-RS232 adaptor chip for about $20.

 

If your LCD module is character-based: USBLCD site
If it's a graphical LCD module it's a little trickier, as Smilodon said: Schijf's USB2LCD II Project

CD

 

Usblcd is always out of stock.
How about the second question:
"Also, is it possible to display temperatures at the lcd directly from thermistors? without the computer turned on. Let me know. thx"

 

You can also contact Henri from LCDinfo. As i know he's built some working USB interfaces for graphical LCD's. Trouble is that you'll have an unique LCD which probably won't run with any other LCDapp than LCDinfo.

 

USBLCD is character LCD only.
And what temps are you measuring if your comp is OFF
Here's a German shop selling a 320x240 USB interfaced LCD, for relatively cheap. Color can be picked too i see.
And again this LCD only runs on one LCDapp; in this case it's Dschi-El-Zeh-De
.

 

guys...my main problem is to display temps at the lcd directly from a thermistor. even if the lcd is based on a serial interface or a parallel or even a usb I dont really care. Of course I prefer usb but I can figure out this later

 

Didn't know about USBLCD (I don't use character LCD's, except in my PIC projects).

Using a micro controller (I love Microchip's PIC-family!) to address the LCD and using its ADC inputs to measure the thermistors, yes it's possible...

CD

 

As Turbokeu says, using a Microcontroller would be the only real way of doing that without it been insainly hard.

What you're looking for does sound like quite a custom product thou, it might be easyer say, if u were wanting to add temp. readers to do this via the SMB or parport. Then you're LCD display software could read the temps, and display them.

 

It may be easier to use a chip like a DS1621 instead of a thermistor, have a look at this project for which full source code is available, may give you some ideas.

 

Thx guys for your replies. i ll have a look. My aim is to display evaporator temps in custom phase-change project. But I want it to be as independant as possible.

 

ok guys. small update. I quit the idea of making the lcd read temps with the pc being off. I ll just have the pc on. Will it work if I make a thermometer that reads temp and feeds them to the pc via serial port like here (thx for the link). Will I be able to display these temps via the lcd's software? Thx in advance