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An award-winning LCD with an Arduino built-in (using only 2 pins)

blog.arduino.cc

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Re: An award-winning LCD with an Arduino built-in (using only 2 pins)

#21

Post by baddox »

ama729 wrote: post #13

> 320 x 240 Resolution Aside from the fact that's for an arduino, which probably mean very low power available, does anybody knows why all those hobbyist LCD are so low in term of resolution? It seem impossible to find something higher than VGA on mouser or even Alibaba, much less a reasonably priced HD screen. Where are all those glorious smartphone screen? (I'm talking about small screen, but even larger one are no…

The glorious smartphone screens are in smartphones, which cost a lot more than 90 USD.

Re: An award-winning LCD with an Arduino built-in (using only 2 pins)

#22

Post by ama729 »

baddox wrote: post #21
ama729 wrote: post #13

> 320 x 240 Resolution Aside from the fact that's for an arduino, which probably mean very low power available, does anybody knows why all those hobbyist LCD are so low in term of resolution? It seem impossible to find something higher than VGA on mouser or even Alibaba, much less a reasonably priced HD screen. Where are all those glorious smartphone screen? (I'm talking about small screen, but even larger one are no…

The glorious smartphone screens are in smartphones, which cost a lot more than 90 USD.

Not really, the Nokia Lumia 520 for example is at $50/70£, and had an IPS screen with a 480x800 resolution, I never saw such a screen sold for hobbyist.

http://en.wikipedia.org/wiki/Nokia_Lumia_520

Re: An award-winning LCD with an Arduino built-in (using only 2 pins)

#23

Post by jpwright »

amckenna wrote: post #6
dirktheman wrote: post #5

It looks cool, but the price is a bit steep. You can get a touchscreen LCD from Adafruit at $39.95 ( http://www.adafruit.com/products/1651 ). You still need to buy an Arduino, but they're cheaper than $45,-. I've bought Chinese Uno V2's for less than $15 a piece.

The advantage of their integrated LCD and Arduino is that it would only use 2 pins instead of the 6-7 that would be occupied by the shield you linked. This would allow you to connect other shields and have more room for add-ons. I agree that $89 is steep though, hopefully that price can come down as more are made.

I don't understand how this board only "uses 2 pins". The schematic shows the ezLCD component still uses 7 pins for I/O. Using the SPI bus requires 4 pins and the other 3 are presumably for the touchscreen sensing. The board still has the full Uno footprint, so you could connect other stuff to those pins at the same time, but you couldn't do anything with them while driving the LCD.

Re: An award-winning LCD with an Arduino built-in (using only 2 pins)

#24

Post by gcb0 »

ama729 wrote: post #22
baddox wrote: post #21

Earlier quoted context omitted.

The glorious smartphone screens are in smartphones, which cost a lot more than 90 USD.

Not really, the Nokia Lumia 520 for example is at $50/70£, and had an IPS screen with a 480x800 resolution, I never saw such a screen sold for hobbyist. http://en.wikipedia.org/wiki/Nokia_Lumia_520

this guy is right. even an overpriced oem replacement for mobiles, with all the extra stuff attached to the board, runs under the $100 range.

just paid $98 for a noteII screen and digitizer combo. its full hd i think.

so, stop sugar coating. lcd and digitizers are cheap. this is either low volume hobbyist market or pure greedy.

and looking at how other things are priced in those sites, like a small roll of wire for $20, id bet it is greedy.

Re: An award-winning LCD with an Arduino built-in (using only 2 pins)

#26

Post by tedivm »

tedivm wrote: post #9

I know people are saying this is a bit steeply prices, but I think this is perfect. I've been looking at the various options and they typically all require three components- the touchscreen/lcd itself, a controller board of some sort, and then the Arduino itself. Then you have to actually put it all together, and as people have mentioned you end up with a lot more than two pins being used. This one at Adafruit costs…

"This one" being this one- http://www.adafruit.com/products/1651

Re: An award-winning LCD with an Arduino built-in (using only 2 pins)

#27

Post by drdaeman »

ama729 wrote: post #13

> 320 x 240 Resolution Aside from the fact that's for an arduino, which probably mean very low power available, does anybody knows why all those hobbyist LCD are so low in term of resolution? It seem impossible to find something higher than VGA on mouser or even Alibaba, much less a reasonably priced HD screen. Where are all those glorious smartphone screen? (I'm talking about small screen, but even larger one are no…

LVDS panels aren't uncommon. In fact, I believe (but not checked) there should be lots of them being sold as replacement parts for notebooks and tablets.

For example, relatively recently there was a post on HN about RaspberryPi-based DIY tablet. It had this link for LCD panel: http://www.chalk-elec.com/?page_id=1280#!/~/product/category.... The store page now says it's discontinued, though, but this was meant just as an example and I'm too lazy to search for a better offers, sorry. :)

Although, those are probably of no use with AVR microcontrollers directly, without a display controller like http://blog.tkjelectronics.dk/2012/10/lvds-display-controlle... or http://hackaday.com/2009/12/12/fpga-driver-for-psp-screen/. Phone LCDs just have it already and panels don't.

Re: An award-winning LCD with an Arduino built-in (using only 2 pins)

#28

Post by rurounijones »

poooria wrote: post #25
hcarvalhoalves wrote: post #10

On a side note, I like how the product is presented by two young girls. Is this intended for educational purposes?

I can't tell whether you're being a feminazi or just a creep. Either way, stop it.

(S)He is pointing out that the presentation is done by two people who are usually not associated with technology and development (they are young and female) as a positive example.

He then posits that this is to show the educational possibilities.

Any negative connotations are coming from your mind, not theirs.

Re: An award-winning LCD with an Arduino built-in (using only 2 pins)

#29

Post by userbinator »

jpwright wrote: post #23
amckenna wrote: post #6

Earlier quoted context omitted.

The advantage of their integrated LCD and Arduino is that it would only use 2 pins instead of the 6-7 that would be occupied by the shield you linked. This would allow you to connect other shields and have more room for add-ons. I agree that $89 is steep though, hopefully that price can come down as more are made.

I don't understand how this board only "uses 2 pins". The schematic shows the ezLCD component still uses 7 pins for I/O. Using the SPI bus requires 4 pins and the other 3 are presumably for the touchscreen sensing. The board still has the full Uno footprint, so you could connect other stuff to those pins at the same time, but you couldn't do anything with them while driving the LCD.

Dallas 1-wire? Haven't looked at the schematic or anything else, but that's an example of an interface that just requires 2 connections - signal and ground.

Re: An award-winning LCD with an Arduino built-in (using only 2 pins)

#30

Post by maqr »

hcarvalhoalves wrote: post #10

On a side note, I like how the product is presented by two young girls. Is this intended for educational purposes?

That's probably why, but I only made it about 30 seconds into the first video before I had to turn it off. Maybe I'm in the minority, but listening to kids present anything really frustrates me.
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