Main > Monitor/Video Forum
GreenAntz RGB to component transcoder
buttersoft:
Nice! looking better than ever!
Sorry to miss the post due to issues i mentioned :(
Ond:
I have my new one now. About all I've done is unwrap it and inspect the board close up. I don't know how it performs yet (that's coming) but the PCB work is very clean and pro. I don't even know what those pots do :lol. I think it's kind of cool to have access to something very niche like this. I certainly don't sell anything in the shop like it, just rubbishy vga to composite stuff. I'm not so much a purist as a perfectionist. If I go down the rabbit hole of design getting something to satisfy me goes on and on and Ond. Good work work Zeb. :cheers:
Zebidee:
--- Quote from: buttersoft on March 16, 2024, 09:20:26 pm ---Nice! looking better than ever!
Sorry to miss the post due to issues i mentioned :(
--- End quote ---
I should give a special mention of your composite sync filtering dongle - used it often when doing testing of the composite sync autoswitching. Much more convenient than regenerating and reinstalling video modes via CRT_emudriver.
--- Quote from: Ond on March 18, 2024, 11:31:07 pm ---I have my new one now. About all I've done is unwrap it and inspect the board close up. I don't know how it performs yet (that's coming) but the PCB work is very clean and pro. I don't even know what those pots do :lol. I think it's kind of cool to have access to something very niche like this. I certainly don't sell anything in the shop like it, just rubbishy vga to composite stuff. I'm not so much a purist as a perfectionist. If I go down the rabbit hole of design getting something to satisfy me goes on and on and Ond. Good work work Zeb. :cheers:
--- End quote ---
--- Quote from: bobbyb13 on March 08, 2024, 12:00:12 pm ---Fun to watch this evolve in real time!
Looking forward to swapping this latest version into something and getting some pictures/video to look for differences.
--- End quote ---
Thanks Ond & Bobby, I am really looking forward to seeing your comparisons.
I may be caught in a design rabbit-hole myself - cannot ignore potential improvements. But there is light at the end of this tunnel. Am currently putting together a full-SMD design that, once I am satisfied, can be assembled more easily, or in a factory even. That might be something Ond could sell from his shop! This would be a good point to move on from, then perhaps even make the through-hole designs public.
To me, the main benefit of all this is what I learn and the cool people I get to engage with along the way.
Ond, might be best to leave the pots (luma and Pr) alone if you don't understand them - they are preset/calibrated with an oscilloscope anyway before leaving my lab. If in doubt, the sweet-spot is generally at around 40-45% of total range.
I am sorry to have not responded for a few days. I seriously hurt myself, fell asleep in my chair while pondering the sync, and fell off, bruised my ribs badly (because I landed on an upright scotch bottle which jabbed me hard between the ribs). Movement has been difficult and painful. Feeling a bit better today so braved the keyboard.
GOOD NEWS
The good news is that I'd completed most of that sync work already, and had half-completed a bunch of boards already.
Latest GreenAntz v1.94 includes a little more bling, an LED to indicate that a sync signal is present. It has three states - on means there is proper sync present, off means no sync, faintly lit means only improper sync is present (for example, horizontal but no vertical, or inverted sync). I also tidied-up the sync autoswitching a bit.
Unfortunately there is still no 15khz filtering of the sync signal. To implement this I'd need another logic gate, and can't really implement that with the current PCB.
@Buttersoft, I think I need to investigate using gambaman's programmed PIC for filtering processing sync. I've had a look through the C coding and it seems fairly straightforward. I'd appreciate any advice you have on where to start, especially regarding what ICs to use and how to program them.
Otherwise, I think I could probably achieve similar results with a quad-logic chip.
Here's a pic of the updated GreenAntz v1.94 with sync LED. I'm currently working on a few to fill orders.
Question: does the yellow sync LED look OK? Or should I go with red? I find the yellow looks too much like green, maybe the red would look better. What do you think?
apoketo:
After using it for a few weeks now, from DOS (200p60) to Indie (270p58) to Video (576i48), powered 24/7: Nothing much to say. It just works, looks like RGB.
The small cardboard box it was sent in was ideal for repurposing into a makeshift housing after adding cable holes.
Great work!
Daniel B.:
I've sent a PM and want to get one of these bad boys!
I'm not a new member by any means but you had mentioned to make a post, so this is that. Just in case.