I'm doing a project of a small unit for my tractor, this contain a pic, rtc, digital thermometer and a hall sensor for read rpm. All the data will display on alphanumeric lcd.
I have to work both day and night, so I need a lcd with backlight.
I would read correctly the lcd on day without turn on the backlight and on night turn on the light.
What kind of lcd I have to choose?
I see this: Link
Can go?
Ps. I have a display with backlight but i can't read it without turn on backlight.
I apologise in advance for my poor/bad English.

 

That looks like a fine choice: two lines each having 16 characters. There are separate pin to turn on a LED backlight. You might find out leaving it on in the day time is OK, unless you are worried about the (battery?) power it needs. I've used a transistor driven by a PIC to turn these backlights on and off.

 

There are separate pin to turn on a LED backlight.

I have already used a lcd so I know this.

You might find out leaving it on in the day time is OK, unless you are worried about the (battery?) power it needs.

I'm sorry but I didn't understand well what you want say.
I haven't nothing problem of power, I have a battery of 120Ah and a alternator of 750W.
My problem is know if it's readable on day without power the backlight led.
I'm not sure of this becouse, as said before, I have used a lcd that you can't read it without led powered.
Thank you very much.

 

Nobody did some similar experiment/project?

 

If what you are asking is will the display will be readable in daylight, it will be readable.

Most LCDs are readable primarily by ambient light. For best contrast and viewing angle, look for 'supertwist' STN / FSTN displays.

 

So you're doing a project using PIC to display time, temperature and RPM of your tractor on LCD....Which PIC are you using? Did you have any experience with PIC before? Without knowing your electronics background, it is hard to give you any pointer.....

May be you can take a look here.
There are projects like PR#3 - interfacing between 16F877A with LCD,
PR#12 - RTC on LCD
PR#11 - Temperature control using LM35.

http://www.cytron.com.my/

All schematics and source codes in Hi Tech C are free to download.
There is also a tutorial section where there are more simple projects.

Allen

 

I have a new revision for character LCD interface here:

http://pic.hitechworld.org/data

It is 4-bit mode, and 16f1824 is used. But also works on 18F PICs.

Most character LCDs can be read w/o backlight. Except the dark blue one's maybe. TFT LCDs in general need backlight to be readable.

 

If what you are asking is will the display will be readable in daylight, it will be readable.

Most LCDs are readable primarily by ambient light. For best contrast and viewing angle, look for 'supertwist' STN / FSTN displays.

The lcd that I linked it's a FSTN than it should be fine.

So you're doing a project using PIC to display time, temperature and RPM of your tractor on LCD....Which PIC are you using? Did you have any experience with PIC before? Without knowing your electronics background, it is hard to give you any pointer.....

May be you can take a look here.
There are projects like PR#3 - interfacing between 16F877A with LCD,
PR#12 - RTC on LCD
PR#11 - Temperature control using LM35.

http://www.cytron.com.my/

All schematics and source codes in Hi Tech C are free to download.
There is also a tutorial section where there are more simple projects.

Allen

Thank for the information. I have good knowledge on PIC.
I have already made the software and test it on easy pic 5, it work.

I have a new revision for character LCD interface here:

http://pic.hitechworld.org/data

It is 4-bit mode, and 16f1824 is used. But also works on 18F PICs.

Most character LCDs can be read w/o backlight. Except the dark blue one's maybe. TFT LCDs in general need backlight to be readable.

The lcd on easypic5 is Blue/white and without backlight I can't read it, but the lcd that I have to buy (linked before) isn't blu.

PS. The first version of project it's this.
Thank for all answers.