LCD using pic controller

[jeymagnettron]

hi.. pleas help me to display my name on a lcd using pic micro controller for my mini project.......

 

[kichapi]

are you using c level languge ? which pic using ? ,which is the Lcd ?

 

[Gayan Soyza]

Read the two PDF's, it has what you want.

 

[jakeselectronics]

Those PDF's are really good.
I remember going through them when I was learning about LCD's.
They tought me everything i needed to know.
I would recomend them too.
I still refer back to to them.

Get your self your breadboard, 44780 type LCD, bunch of resistors, and PIC. Go through those 2 PDF's and you'll be laughing.

 

[jeymagnettron]

thank u very much friends......

 

[jeymagnettron]

s.. iam comfortable with c lang itself...

 

[jeymagnettron]

can u pleas help me with any sample prog for interfacing lcd with pic..... sothat i can incorporate my own ideas, modifyin it....

 

[jakeselectronics]

This was one of my first programs with an LCD and a pic16f84a.
YouTube - 16F84A: Digital Voltage Selector with LCD

it is in assembly though. If you still want the source code for it me know.

 

[jeymagnettron]

of course jake... i need the codings.. can u please provide me

 

[jakeselectronics]

As I said it is coded in assembler language.
Here is the schematic and the .ASM file.

This was one of my first program and has not been updated so please excuse the flaws of the program.

(The LCD is ran in 4bit mode, just so you know)

also, this is a calculator i used to work out the resistor values for the LM317:
LM317 Voltage Calculator

 

[jeymagnettron]

thank u very much...

 

[kichapi]

hai i sent my first display program .display name ,

 

[kichapi]

i used pic 16f877a

 

[jeymagnettron]

thank u kichapi

 

[jeymagnettron]

k... will deal with it

 

[Mr RB]

As I said it is coded in assembler language.
Here is the schematic and the .ASM file.

This was one of my first program and has not been updated so please excuse the flaws of the program.
...

Nice circuit Jake! Might I suggest with controlling the LM317 you could have used 2 transistors and a default resistor, instead of 3 transistors.

Besides being simpler it would have a safety advantage, as if the PIC fails or resets (any condition where PIC pins go open circuit) the voltage would be fixed at 12v. With your 3 transistor system the LM317 goes to max output voltage if the PIC is in reset or glitched as it's adj pin loses any reference to ground.

 

[jakeselectronics]

I like the idea of the default resistor in case of reset etc... Good thinking mr.RB