jyashi
Posts: 6
Joined: Sat Jan 02, 2016 5:06 pm

What display can I use to show the output of raspberry pi?

Mon Jan 04, 2016 10:02 pm

I bought an adafruit 1.27" OLED https://shop.pimoroni.com/products/adaf ... osd-holder to use as a monitor to show the raspberry pi screen but later got told it cant be used in such manner because it needs a framebuffer. I want to have a small 1" - 3" screen that i can use as a monitor attached to PI without having to plug into my tv all the time. I know there is a PI display out but it is 7" and i want a smaller screen.

Do you guys have any ideas if i can use OLED screen at all for this purpose or do i need to use a LCD?

Also any idea of such products in mind?

Thank you

davenull
Posts: 1159
Joined: Thu Oct 22, 2015 7:22 am
Location: a small planet close to Betelgeuze

Re: What display can I use to show the output of raspberry p

Mon Jan 04, 2016 10:08 pm

I am using full HD screens (7" - 22") plugged to the HDMI port
also 5" HD is available
pros:
they all work by plug-and-play, no driver issues! ;)
#define S sqrt(t+2*i*i)<2
#define F(a,b) for(a=0;a<b;++a)
float x,y,r,i,s,j,t,n;int main(){F(y,64){F(x,99){r=i=t=0;s=x/33-2;j=y/32-1;F(n,50&S){t=r*r-i*i;i=2*r*i+j;r=t+s;}if(S){PointOut(x,y);}}}for(;;);}

Mister_C
Posts: 22
Joined: Mon Jun 25, 2012 8:53 pm

Re: What display can I use to show the output of raspberry p

Mon Jan 04, 2016 11:16 pm

Magpie issue 35 had a project that used an OLED display (internet radio). It was also referred to in this thread viewtopic.php?f=106&t=115969
I don't think they used the display you got from Adafruit, but it might be a start point for you...

Alternatively, the 1602 LCDs (and others) were used in many well documented projects in "the early days" as simple text screens. These can be driven from GPIO or i2c controllers. Beware though, many of the tutorials are pre Device Tree, so you'll need your wits about you for the initial setup stages.

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mikronauts
Posts: 2783
Joined: Sat Jan 05, 2013 7:28 pm
Contact: Website

Re: What display can I use to show the output of raspberry p

Mon Jan 04, 2016 11:23 pm

There are a lot of choices:

1) composite video monitor - limited to ~320x240 full color pixels, can display fuzzy 640x480, no way to make it better.

2) SPI displays - depends on which one, anywhere from 128x128 to 320x480, sharp as long as you don't try to scale down higher resolution. If you must scale, do not exceed 2x horizontal and 2x vertical native resolution of the display

3) HDMI display adapter to LCD - normally 800x480, but both higher and lower resolutions are available. Sharp as long as you don't try to scale down higher resolution. If you must scale, do not exceed 2x horizontal and 2x vertical native resolution of the display

For some examples, see some of my LCD reviews:

http://www.mikronauts.com/raspberry-pi/ ... periments/

http://www.mikronauts.com/raspberry-pi/ ... er-review/
http://Mikronauts.com - home of EZasPi, RoboPi, Pi Rtc Dio and Pi Jumper @Mikronauts on Twitter
Advanced Robotics, I/O expansion and prototyping boards for the Raspberry Pi

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