After I receive and solder mine, I'll be able to test it on a modern-ish PC (a Quad core AMD Opteron running Ubuntu)

Badscrew wrote:

After I receive and solder mine, I'll be able to test it on a modern-ish PC (a Quad core AMD Opteron running Ubuntu)

Great! You will show it to us ...

That's pretty neat, the green looks great!

I'm not so sure about amber though, it may be due to the TFT in the video, but it just doesn't look quite right. I never was a huge fan of amber monitors, mind.

Meh. My TVM EGA monitor does it on the fly by simply turning a knob on the front.

ynari wrote:

That's pretty neat, the green looks great!

I'm not so sure about amber though, it may be due to the TFT in the video, but it just doesn't look quite right. I never was a huge fan of amber monitors, mind.

On the amber color, I think the representation of it can be variable ... some with a more yellowish tone, others with a more orange tone. Just look for pictures of amber monitors on Google to check. However, I enclose the project outline below in case there is interest in it:

To adjust the amber color tone, simply adjust the 75 ohm resistor that represents the green "75%" ... a smaller resistance, a greater yellow tone and a greater resistor, a greater orange tone.

I must also say that the ghost and goblins video that I have shown you is not the best example for the representation of amber color. In that first proof of concept I wanted to show how the luminance could be adjusted with three resistors and there is no resistor of reduction of the green color, it is pure green ... therefore the combination that is seen in the video is really yellow.

Then for the final product I determined that the most adjusted value (according to my point of view) for the green color is 75 ohms, which gave it a more orange hue.

In this video, you can see how the amber with the resistor of 75 ohms would look like:

https://youtu.be/DbyfIixwHSs?t=85

Posted in Hackster. It includes gerbers, scheme and board (Eagle). BOM also lists links to purchase them. Everything is published under the GPL3+ license:

https://www.hackster.io/spark2k06/monochromevga-07a41e

Great !

Another video of a MonochromeVGA user testing its operation on a Sony Triniton CRT monitor and the MiSTer 😀

https://www.youtube.com/watch?v=Ul84tcvvPOk

MonochromeVGA case designed by Agus:

https://twitter.com/spark2k06/status/12953963 … 3987315712?s=19

Now with 3D case available in Tindie, thanks to Agustin Gallego for designing it.