2Dsx
Posts: 1
Joined: Sun Apr 29, 2018 9:47 pm

Re: STICKY: Using a Gert VGA 666 adapter - [HOWTO]

Sun Apr 29, 2018 10:31 pm

Hello everyone.
Before writing, I clarify that I do not buy any kit, I assembled it on my own, buying the resistances and mounting it on a protoboard.
Everything works perfect, except that gradients look weird.
The pure colors look perfect, when combining colors it looks like saturated, I attach images so that you understand what I'm talking about: https://imgur.com/a/pUodiQb.
I am using resistances of 5% tolerance, and I read in the manual that the 500 Ohms should be as close as possible, in this case I am using 470 Ohms, this interferes? Somebody could help me? I would appreciate it very much, greetings!

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Burngate
Posts: 5661
Joined: Thu Sep 29, 2011 4:34 pm
Location: Berkshire UK Tralfamadore
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Re: STICKY: Using a Gert VGA 666 adapter - [HOWTO]

Wed May 02, 2018 6:38 pm

I'm not sure what you mean by "gradients look weird", and your picture doesn't help me.

However, if you use non-ideal resistor values then, on a ramp from black to full red/green/blue, the 63 steps won't be identical in size.

The ideal resistor value should be 500R and Gert recommends 1%. That means anywhere from 495R to 505R
470R is 6% low, and so a 5% resistor could be 11% low (though may not be). However, you could add a 30R resistor in series if you want to be more accurate.

Alex_321
Posts: 1
Joined: Fri Sep 14, 2018 8:05 am

Re: STICKY: Using a Gert VGA 666 adapter - [HOWTO]

Fri Sep 14, 2018 8:08 am

Is compatible Gert VGA 666 adapter with the last model Raspeberry Pi 3b+? Can I use this adapter to manage 320x240 resolution? Can I use this adapter in O.S as Lakka, Recalbox or Retropie?

Greetings.

igcek
Posts: 1
Joined: Wed Jan 16, 2019 4:39 pm

Re: STICKY: Using a Gert VGA 666 adapter - [HOWTO]

Wed Jan 16, 2019 4:48 pm

Hi,

i assembled and played with gert666 allmost from the beggining. So i remember that then you had to also change bt-blob but as it progressed all you had to do is add couple of lines to config.txt.

Yesterday i started playing with it again and it doesnt work. I used 2 different gert666 connectors that on old version work and i did exacly as it sais in the how to on the first post. What i want to know is, has support for gert666 been removed from new raspbian (2018-11-13-raspbian-stretch-full.zip)? Can anybody try the new version just to see that its not only me. And if anybody could point me to the last version of raspbian that works.

Thank you very much :)
igcek

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