Show Posts
Pages: 1 ... 3 4 [5] 6 7 ... 289
61  Using Arduino / Displays / Re: Fix LCD flickering problem - Nokia 5110 on: August 06, 2014, 09:18:33 am
Take a look at reply # 1 again.  The first paragraph mentions more than bad wiring.  You probably should consider what Nick said about the data feed rate.

Don
62  Using Arduino / Displays / Re: Controling 20x4 LCD with Serial interface module on: August 05, 2014, 09:22:41 am
Quote
Well, i looked it up and i think that the guy has problem with backlight.

Did you look at reply #6 in that thread?

Don
63  Using Arduino / Displays / Re: Controling 20x4 LCD with Serial interface module on: August 04, 2014, 08:37:36 am
I have a similar if not identical module.

Take a look at this forum thread: -->  http://forum.arduino.cc/index.php?topic=241928.0


Don
64  Using Arduino / Displays / Re: LCD and adruino mega help on: August 03, 2014, 12:29:01 pm
Quote
Code:
Serial.begin(19200); // era beginSerial
According to the data sheet the default baud rate is 9600.

I would suggest starting with a sketch that writes something like "Hello Arduino" to the display once in setup() with nothing in loop().

Also - using code tags not only makes your code more readable it eliminates problems like the smiley face in your backSpace function.


Don

65  Using Arduino / Displays / Re: LCD and adruino mega help on: August 02, 2014, 02:48:34 pm
Quote
This is my firs post .
You really should read the sticky thread near the top of the forum: "How to use this forum".

What we really need is a link to some more information about the serial interface board that you are using.

I found some information about the chip at this website: -->  http://www.pichips.co.uk/index.php/P017_LCD_Chip
I found a datasheet here:  --> www.byvac.com/downloads/datasheets/P017%20DataSheet.pdf

These two sites seem to describe the IC itself but not the interface board.  There is a circuit for a PC board on the data sheet but I am not sure it matches the one that you are using.


Quote
I'm trying connect Adruino mega and lcd display using RX
You are going to have to connect the Rx pin of your interface board to one of the Tx pins of your Mega and then come up with a sketch to send data to that Tx pin.

Quote
Is this connection ok ?? on my lcd is 16 pins and on serial lcd is 14 ( is that ok ?? )
The serial board appears to have 18 pins, not 14.  The extra two pins are used if you have a tri-color backlight and can be ignored in your case.  From your pictures I cannot tell if your two boards are connected properly.  Typically the small interface board would be mounted behind the larger display board, not 'alongside' or 'above' it as you have done.


Don








66  Using Arduino / Displays / Re: Problem connecting Arduino UNO and SaintSmart 20x4 on: August 02, 2014, 01:58:19 pm
Quote
it seems that the lcd was working all the time. It seems that it needs a refresh cycle, which is done in the loop and since i had nothing in the loop, it displayed the message for a very short time and then it dissapeared.

These LCDs do not need any sort of refresh cycle.  Data written to the display will remain there until overwritten or until the power is removed.  You had something else wrong.

Don
67  Using Arduino / Displays / Re: Problem connecting Arduino UNO and SaintSmart 20x4 on: August 02, 2014, 09:07:56 am
Quote
Perhaps you should wait for bperrybab to chime in (if he does see this thread),...
You will have a better chance of attracting Bill if you put the term 'I2C' in the topic heading.  

Don
68  Using Arduino / Displays / Re: Chipsets compatable with Hitachi HD44780? on: August 02, 2014, 08:58:00 am
According to my notes the SPLC780D has an extended set of character patterns in the CGROM which shouldn't affect it's compatibility with the LiquidCrystal library.

(This means that 'note 2' on that chart also applies to the SPLC780D)


Don
69  Using Arduino / Displays / Re: Using the included LCD Display without libraries on: August 01, 2014, 04:08:24 pm
Quote
There's no magic to the library, it's essentially a bunch of digital writes and delays.
Quote
I personally would rather work with un-commented assembly language code than plod through the convoluted web of Arduino library code

Nice way of contradicting yourself, floresta.


Is the following less contradictory?

There's no magic to the library, it's essentially a convoluted web of digital writes and delays.

I personally would rather work with un-commented assembly language code than plod through the convoluted web of Arduino library code.


Don

70  Using Arduino / Displays / Re: Turning an LCD Upside down, or LCDs with pins on the bottom on: July 31, 2014, 09:26:43 pm
Quote
Is there a way to wire or program an LCD that will let me turn it upside down?

No.

Quote
I've seen a couple of pictures of LCDs that had pins at both the top and bottom, or just the bottom,...

If you do find a source for an LCD module with the pins at the lower left make sure that you carefully check the datasheet.  The vast majority of those LCDs use a non-standard pinout and there are several different variations.

On the other hand the few LCDs that have pins at both the upper left and lower left seem to use the standard pinout (with pin 1 nearest the outer edge).


Don
71  Using Arduino / Displays / Re: Using the included LCD Display without libraries on: July 31, 2014, 09:15:36 pm
Quote
Is this possible ...
Absolutely.

Quote
...or is the library able to do some stuff what you canĀ“t do just with digitalWrite() and delay()?
No.  There's no magic to the library, it's essentially a bunch of digital writes and delays.

Follow the LCD Programming Examples link at http://web.alfredstate.edu/weimandn for heavily commented programming examples.


Quote
You can look at the source code for the libraries.
I personally would rather work with un-commented assembly language code than plod through the convoluted web of Arduino library code.

Don

72  Using Arduino / Displays / Re: 16x2 goes blank after few hours. on: July 30, 2014, 01:47:20 pm
Quote
Not so much really, its still going blank, takes like a day, day and a half  ...
I think you should be concentrating on what happened just before the display went blank or went nuts rather than on how much time has transpired since it last did so.

Don
73  Using Arduino / Displays / Re: SMH_7SD on: July 28, 2014, 09:32:52 pm
I give up, what's a SMH_7SD?

Don
74  Using Arduino / Displays / Re: connect act2004a lcd to uno on: July 28, 2014, 11:17:32 am
Quote
I have a act2004a lcd that I'm trying to figure out how to hook up to a uno but can't find any info on how to do this.

Have you considered trying the Arduino tutorial: --> http://arduino.cc/en/Tutorial/LiquidCrystal


Don
75  Using Arduino / Displays / Re: LCD black boxes problem! on: July 27, 2014, 04:19:48 pm
I suggest that you rework your solder joints on the LCD header strip.

Don
Pages: 1 ... 3 4 [5] 6 7 ... 289