Will this 16x2 lcd work ?

[altainta]

Warning this are very basic (noob) questions
I have never touched a LCD before. this is my first time...
I messed up buying 100 ohms and 1k resistor in place of potentiometer i don't know some sign of elec
I have done some project recently so i can do this very effectively just seeking small guidance..

Some Questions :-
1) can 16x2 LCD without potentiometer (pot) works ?
2) Will this lcd Work ? ( i brought it)

3) Does it have a backlight ? (i don't think so.)
4)Will this schematic http://lcdsmartie.sourceforge.net/lcd44780.gif will work for this lcd ?
5) can i see IR executed code over the lcd screen (that is why i am doing this project)
6) can i use attiny 2313 and do some thing with this lcd ? 16x2
7) How to exactly apply the potentiometer ( i mean + - etc)
do we have photos or videos regarding diy
9) What exactly are the pin 15 and pin 16 for ? which led 3mm or normal 5mm ? what does it shows the status ?
10) There is a + and - sign near the R8 AND R7 what they stand for ? should i have to apply 5v to them ? or directly to the 2 pin?

Front img


I brought this lcd because it is the only lcd which i can borrow for the money i got... other are too costly.. But this is trial if success ed than i will buy a 4x20 Blue lcd
Thankyou...

[caesar]

Some answers:
1) yes, just connect pin3 to GND
2) if it's HD44780 compatible it should work
3) it has (pins 15 & 16)
4) yes, that's the schematic
5) only if you make it. The lcd will show whatever you make it to
6) just read hardware discussion, there are a few projects using Atmel uC.
7) you can leave them out and it will work ok.
8) photos are on the forum, see hardware discussion
9) power for the lcd's backlight.
neither 3mm nor 5mm, it's integrated.
it allows you to read the lcd in the dark.
10) those are the connections to the lcd's backlight system.
do not touch those two connections, disregard them. Power for backlight is applied to pins 15 and 16.

Have fun!

[altainta]

Hey that is a Very very good reply it is like booster for me on the project...

One thing more

1) There in the Sch it is
http://lcdsmartie.sourceforge.net/lcd44780.gif
pin 15 and 16 gets VB+ VB- how much voltage should be applied to them ?
Or it will derive the +5 volt from pin 2 ?
In short i mean if i apply +5 volt to pin 2 (which is join to 15) should there be anything left to apply i mean extra voltage ?

2) U said that i should apply pin 3 to ground that means now the sch will be
what abt pin 15 and 16? it should be like this ?


Is it correct ?

[AJ256]

Connect pin 15 to +5V only. Do not connect it to ground also.

[caesar]

1)+5V is ok because that LCD in your pictures has internal resistors to limit the current for backlight.


2) connections should be made like this

[altainta]

I am facing some problem

There is a Pot at
http://lcdsmartie.sourceforge.net/lcd44780.gif
16 to gnd (the 100)

I got 100k from the shop.. they say there is no 100 one..
So is it okay... ?

i connected that pot to the pin what i exactly did is

pin 1 pin 2 and pin 3
I connected 16 to pin 1 and connected 2-3 together to gnd i think

But it doesn't work I mean i can operate the lcd everything is showing perfectly but i want to set the Brightness because it hurts eyes

[mattcro]

100K ohms (100000 ohms) is no good for the brightness potentiometer - you need a low resistance pot like 100ohms or perhaps 220ohms or 47ohms if you can get that. The potentiometer should be the type with a shaft for mounting a control knob, not the tiny preset type.

If you only need a fixed brightness, you can use 1 or more low-value resistors instead of the potentiometer. Try about 10 ohms or so - you'll have to experiment to find the right value.