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Topic: choosing a LCD TFT Touchscreen shield (Read 36 times) previous topic - next topic

storm

Hi

I'm thinking about getting a "2.8" TFT Color LCD touch screen shield" from nuelectronics - http://www.nuelectronics.com/estore/index.php?main_page=product_info&cPath=1&products_id=19



Has anybody else got one and would recommend it, or does anybody know of any similar LCD shields that are any good?  Equally has anybody come across any problems/limitations with it (or similar ones)?

I don't have any specific projects in mind for it at the moment, so if anybody knows of any funky projects that you can do with it do say! (I'll probably be hooking it up to a duemilanove, though if the projects need anything more powerful it would be a good excuse to buy the mega!  If serious number crunching is needed (i.e. for realtime interactive 3D graphics or video processing) I don't mind hooking it up to a PC or Mac).  

Dave

mowcius

They look like good LCDs but I'm not sure of how good they actually are as I have never used one.

Regarding projects, this was done with the much more expensive touch shield from liquidware but this is an arduino project with touch screen.

The scooterputer:
http://www.janspace.com/b2evolution/arduino.php/2010/06/26/scooterputer


Mowcius

shodan

I was thinking of asking the same question a few days ago

there are a bunch of cell phone replacement lcd on ebay for extra cheap, I was thinking which one would be good value to use in a arduino project

did someone do a survey of the various lcds (touchscreen or not) that you can get on ebay and which one can be easily used with an arduino ?

it would probably be worth it to pick a very popular super cheap 3" or so, tft touchscreen lcd that is going to be in wide circulation for the next couple years and use that as the "prefered" arduino color graphic lcd !

mowcius

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it would probably be worth it to pick a very popular super cheap 3" or so, tft touchscreen lcd that is going to be in wide circulation for the next couple years and use that as the "prefered" arduino color graphic lcd !

The kind of touch screens to be used in products are not normally compatible with the arduino.

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did someone do a survey of the various lcds (touchscreen or not) that you can get on ebay and which one can be easily used with an arduino ?

Nope but with a search you can find all the screens that have been interfaced with. There are a lot of 5v screens that an arduino could control but you have to spend the time doing it!

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there are a bunch of cell phone replacement lcd on ebay for extra cheap, I was thinking which one would be good value to use in a arduino project

The nokia ones are often used but they are only small and not touch screen.

Mowcius

storm

Thanks very much for the replys

On a slightly different note, has anybody thought of attaching an arduino to a USB to VGA converter? (or similar device) - this would then allow a whole range of screens to be connected to the arduino

mowcius

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On a slightly different note, has anybody thought of attaching an arduino to a USB to VGA converter? (or similar device) - this would then allow a whole range of screens to be connected to the arduino

Thought of something similar but it's not really possible. The arduino does not have enough processing power.

Mowcius

storm

It's heading into a different area, but this is quite an interesting shield: http://www.batsocks.co.uk/products/Shields/TellyMate%20Shield.htm

It's a 38*25 character (not pixels, but character) composite video TV shield for an Arduino - have a look at the examples page

mowcius

Yes, I have seen that shield and have it on my list but unfortunately my project opportunity for using it has passed so I can't justify buying one now.

Mowcius

florinc

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has anybody thought of attaching an arduino to a USB to VGA converter?

Somebody did:
http://microvga.com/arduino

mowcius

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Somebody did:
http://microvga.com/arduino

I stand corrected.

Thanks Florin  :)

AndyL

Hi,

In response to the original question, I have one of the nuelectronic tft/lcd shields (the 2.4" version) and found it an interesting sheild to use. It does however have a number of drawbacks, fristly there are very few i/o pins left. I seem to recall only about 3 or 4 analogue pins including the ones used for I2C communications.

The distance between the 2 rows of pins is slightly wider than it should be for an arduino shield. The pins are bent inwards slightly to compensate but still tries to force the arduino connectors outwards.

The display was stuck to the PCB using double sided tape which tended to lift around the connector end so a dab of glue fixed this.

The library originally available was pretty basic, there was a recent update and it has improved with more demos showing a simple button meny and text (although the text demo didnt seem to work for me). There is one issue I have found with the bitmap demo in that it displays the image in reverse.

I've not had chance to play with the updated library yet other than running the demos.

The old library seemed to have problems with the touchscreen reading functions being a bit on the noisy side.

I did do a write up some time ago which needs a bit of an update now the library has been updated, its at http://blog.thiseldo.co.uk/?p=450

Hope this helps  :D

Andy



mowcius

Well it is much cheaper than the other alternatives. I would not expect many free pins and it might take some time to get some decent libraries and example code...

Mowciuus

AndyL

It is a very good price, especially the 2.4" version. I couldnt justify the extra tenner for the larger screen for something I just wanted to have a play with.

As with all these shields, someone is likely to write a better library. I had already written a couple of simple demos that list the contents of the SD card and display animated buttons that move when you click on them.

I'll probably take it with me on holiday in a couple of weeks and have a look at the code then. It wont be the first time I've taken an arduino on a camping holiday with me  ;)

Cheers

Andy

storm

Thanks for the replys and info about the shield

I haven't yet looked at the code to see how the nuelectronics shield actually works, but it might be possible to use a shift register to minimise the amount of pins used.  

mowcius

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but it might be possible to use a shift register to minimise the amount of pins used

Unlikely but possible I suppose. It wouldn't then be a shield though...

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