HD44780 1602 compatible LCDS for sale


17 posts
by kghunt » Mon Aug 06, 2012 7:34 pm
I have had these working great with the pi so I imported some so you don't have to.

http://www.ebay.co.uk/itm/330774962065? ... _500wt_922

I can give example code and wiring if needed.
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by robwriter » Mon Aug 06, 2012 8:29 pm
I'm pretty new to electronics and I imagine not all LCDs are created equal. I was looking to buy a couple of these, but found some that look similar that are much cheaper - can you explain if the ones you're selling are better than the ones that cost less?
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by kghunt » Mon Aug 06, 2012 8:40 pm
I have no idea. I can't vouch for LCDS I have not used. I have also had more expensive LCDS than mine and they were of lower build quality. As long as they are HD44780 compatible they will work. A lot of the cheaper ones I found are delivery from china so long waits. My first china one took 3 weeks.
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by texy » Wed Aug 08, 2012 4:37 pm
Hmmm.......with a link to my thread :D
I,ll be expecting commission ;-)

Texy
"2.8inch TFT LCD + Touch screen" add-on boards for sale here :
http://www.raspberrypi.org/phpBB3/viewtopic.php?f=93&t=65566
50p goes to the Foundation ;-)
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by kghunt » Wed Aug 08, 2012 7:04 pm
texy wrote:Hmmm.......with a link to my thread :D
I,ll be expecting commission ;-)

Texy


How about an LCD?
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by texy » Wed Aug 08, 2012 7:28 pm
Nah - your alright. I got something up my sleeve. Watch this space.
T.
"2.8inch TFT LCD + Touch screen" add-on boards for sale here :
http://www.raspberrypi.org/phpBB3/viewtopic.php?f=93&t=65566
50p goes to the Foundation ;-)
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by wh1p » Thu Aug 09, 2012 1:56 pm
texy wrote:Nah - your alright. I got something up my sleeve. Watch this space.
T.

I'm watching and waiting xD
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by Hiro » Sat Aug 11, 2012 6:58 pm
Anybody know where i can get one of these from in the UK without having an Ebay account?
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by kghunt » Sat Aug 11, 2012 8:07 pm
I have a few left what means of payment do you have?
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by jhd » Thu Aug 16, 2012 11:00 pm
Could you share your sample code please ?
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by ctheroux » Fri Sep 14, 2012 12:43 am
I have written a C++ library called PILib that implements an interface for HD44780 based LCD displays for the Raspberry PI. It can be downloaded at http://www.ctheroux.com/raspberry-pi/. It is pretty easy to use. Source code and complete documentation are included. A "Hello World" is as easy as:

Code: Select all
#include "HD44780.h"

int main() {

   CTTPI::HD44780 module(1, 16);
           // EN  RS RW  D4  D5  D6  D7
   module.initialize(17, 18, 0, 21, 23, 24, 25);
   module.writeString("Hello world!");
   return 0;
}
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by MattHawkinsUK » Fri Sep 14, 2012 9:18 am
You can get these displays cheaper ... but you'll have to wait for them to arrive from China.

I've got a 16x2 and 20x4 LCD module and they are well worth a fiver given the fun you can have. If you want to save £2 then order from China or Hong Kong and wait 2 weeks :-)

The modules are all pretty much the same. The only real differences are colour of the back light.

Details of my 16x2 and 20x4 LCD experiments in Python are on my blog.
My Raspberry Pi blog and home of the BerryClip Add-on board : http://www.raspberrypi-spy.co.uk/
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by iharris » Mon Jul 01, 2013 3:15 pm
We now have a good 1602 LCD display available at Embedded Adventures that works nicely with the Pi.

Image
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by joan » Mon Jul 01, 2013 3:54 pm
iharris wrote:We now have a good 1602 LCD display available at Embedded Adventures that works nicely with the Pi.

Image

Seem to be an awful lot of wires for a serial LCD!
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by iharris » Fri Sep 27, 2013 2:53 pm
There are a few pins required to make even a serial LCD work.

BLK - Backlight LED cathode (ground)
BLA - Backlight LED anode (positive supply)

E - Latch
CLK - Clock
DI - Serial data In

VO - Contrast adjustment (0V – VDD)

VDD - Positive supply
VSS - Ground connection

Strictly speaking, on these displays only the three pins (E, CLK, DI) need to be connected to the Pi in order to get it to display text. This is a nice improvement on the usual parallel interfaces that require at least 4 data pins + R/W + E + RS (7 pins), and the display also runs entirely at 3.3V.

If we get some positive feedback on people wanting more serial LCD displays, we will look at moving some of the other parallel interfaces to clocked serial.

kind regards
Ian.
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by fanoush » Fri Sep 27, 2013 2:59 pm
MattHawkinsUK wrote:The modules are all pretty much the same.

According to documentation there may be difference in character set. With the cheap ones from china you get upper half of ascii table full of asian characters and symbols. I would pay a bit more for the one with latin code page but I'm afraid the more expensive ones are just imported from asia and sold with a markup and still have same asian character set.
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by kghunt » Mon Sep 30, 2013 8:16 am
I have been using my chinese ones for ages now and they work absolutely fine with all arduino and pi libraries. I know you have to wait 6 weeks but I would never pay £7 for one of these screens when you can get them for £1.60. I have both and they are identical. I can't see a difference.
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