jaromirs
Posts: 1
Joined: Fri Dec 09, 2016 11:02 am
Location: Bratislava, Slovakia
Contact: Website

Raspberry pi zero, cheap HVGA TFT, which one?

Fri Dec 09, 2016 12:48 pm

Hi all,
I'd like to make small portable computer around rpi zero and need display with at least 480x320 resolution (320x240 is too small), adequate price (connecting >50USD display to 5USD computer is rather strange). I don't need ready to go solution from hardware point of view - I'm quite experienced HW guy, though not that much experienced when it comes to Linux configuration.

At first I expected to use 4,3" screen for rear parking camera from aliexpress, it wa trivial to set-up, but this one is somehow sub-optimal, to say at least. The picture is blurry, especially on higher contrast edges. Text is difficult to read, though decreasing resolution down to 400x300 seems to help a bit. But 400x300 is too low resolution for use with desktop GUI. Some windows are just running away out from desktop, yet I have poor picture quality. Seems like AV connector is not the way to go. There are some possibilities I considered:
* In the "gameboy-zero" circles the favorite display is small 2,2" 320x240 one, which is great for old games emulators, but again, not that great for GUI, because of its resolution. But cost, ease of use (fbtft and lot of documentation around the web) is just perfect.
* Adafruit PiTFT https://www.adafruit.com/products/2097 are better, but the price tag is somehow high for me, plus it is packed with things I don't need, like touch screen interface. Not sure about its compatibility with zero.
* KeDei like displays viewtopic.php?t=124961 are just awful. Proprietary kernel, slow refresh rate, though the size and price seems just OK.

Do you have any other ideas?

tinylcd
Posts: 206
Joined: Sat Oct 26, 2013 4:07 am

Re: Raspberry pi zero, cheap HVGA TFT, which one?

Sat Dec 10, 2016 4:26 am

hello

you can look at below models and see if it can meet your requirement

http://www.neosecsolutions.com//product ... 8&cPath=17

the below product is specially for pi zero as it do not have any header , but you need to do some wiring

http://www.neosecsolutions.com//product ... 5&cPath=28

regards
tinylcd

aBUGSworstnightmare
Posts: 1508
Joined: Tue Jun 30, 2015 1:35 pm

Re: Raspberry pi zero, cheap HVGA TFT, which one?

Sat Dec 10, 2016 8:45 am

What about 5.7in VGA for 20EUR? http://www.pollin.de/shop/dt/Nzk1ODc4OT ... 0x480.html

A timing is here:
viewtopic.php?p=1075560#p1075560

You will need some jumper wires to connect it to the GPIO.

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