VOGONS


Another Voodoo 2 SLI bridge

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Reply 20 of 39, by Tevian

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The next test PCB will be the fan carrier board. I already have two Noctua 40mm to try it out. The LEDs are plenty bright and I think they turned out well. I didn't know how much light would shin thru the PCB but I'm happy with the results!

I'm not sure how many folks use or need a multi-PCI spanning bridge, but I decided to craft a 40mm and 60mm bridge with custom artwork. The 40mm has a knock-out Quake logo but decided to not add LEDs, while the 60mm bridge has a knock-out and LED backlight. Not sure it was totally needed but I trace length matched on the 40mm and 60mm PCB because I had to route around the knock-out causing some traces to have <10mm mismatch.

Once I know the other test PCB works, I'll upload these designs to GitHub for everyone! Thanks for the inspiration for everyone who contributed to the original post by @matze79.

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Reply 21 of 39, by H3nrik V!

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Woa, that's really cool!

Didn't the "need" for a 60 mm version arise from the extra room for fans?

Please use the "quote" option if asking questions to what I write - it will really up the chances of me noticing 😀

Reply 22 of 39, by Tevian

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H3nrik V! wrote on 2024-03-19, 11:30:

Woa, that's really cool!

Didn't the "need" for a 60 mm version arise from the extra room for fans?

No... The 20mm bridge fan carrier board (using 40mm fans) "should" work. I've done a simple test of placing the two fans on top of the Voodoo2s and they really do a good job of pushing air between the cards. The 40mm and 60mm span gives a bit more distance and regular case air flow would probably be enough. Besides, the 20mm version with two fans covers both cards. The larger span puts both card faces out of reach for the two fans and might get pretty ugly with multiple fans trying to cover both. A single larger fan might work, but I don't think I'd like the aesthetic very much. 😋

Reply 23 of 39, by Tevian

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Finally got the fan carrier board assembled and preliminary testing. So far, it's looking really good!

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I did some super limited testing (I ran out of time but wanted to post the results) with a thermal camera. Running Quake v-sync off for 10 minutes with and without the fan bridge, the main 3DFX processor is cooler by 15°C with bare chips. With attachable heat sinks, I'm sure it would be even better.

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Reply 24 of 39, by H3nrik V!

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Holy fudge, that is absolutely awesome!

Please use the "quote" option if asking questions to what I write - it will really up the chances of me noticing 😀

Reply 26 of 39, by Tevian

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Got the latest boards and they're looking pretty nice. The 60mm bridge has 8 neopixels and an ATTINY85 micro to control them. I'm going to assemble one soon to see if it works...

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I don't like the mask relief on the silkscreen parts so I'm going to remove those on another revision.

Reply 28 of 39, by H3nrik V!

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Tevian wrote on 2024-04-06, 00:35:

Got the latest boards and they're looking pretty nice. The 60mm bridge has 8 neopixels and an ATTINY85 micro to control them. I'm going to assemble one soon to see if it works...

Is the neopixel an ARGB LED?

Please use the "quote" option if asking questions to what I write - it will really up the chances of me noticing 😀

Reply 29 of 39, by Tevian

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H3nrik V! wrote on 2024-04-06, 13:27:
Tevian wrote on 2024-04-06, 00:35:

Got the latest boards and they're looking pretty nice. The 60mm bridge has 8 neopixels and an ATTINY85 micro to control them. I'm going to assemble one soon to see if it works...

Is the neopixel an ARGB LED?

Ah yes, they're addressable! I'm using these, https://www.adafruit.com/product/4691.

I completely suck at coding BTW. This little flame effect was written by chatGPT. It's not what I want, but it works ATM. Dave's Garage YT channel had some great-looking fire effects, but the coding is all for ESP32 and I don't really understand how to port that to a small ATTINY85. Oh well...

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Here's a short vid demo!

https://www.youtube.com/watch?v=B25BmlSav9U

Reply 30 of 39, by H3nrik V!

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Nice looking!

Regarding the ESP32 code, the attiny may be too weak for a code port to make sense

Please use the "quote" option if asking questions to what I write - it will really up the chances of me noticing 😀

Reply 31 of 39, by Veeb0rg

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have you considered putting a light up 3dfx logo where the quake or doom logo is?

I just put in a order for some of the 20mm Quake 1 ones.

Last edited by Veeb0rg on 2024-06-03, 04:03. Edited 1 time in total.

Reply 32 of 39, by Sphere478

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Oooo very very cool!

Wonder how that 3dfx logo I worked on on the bridge I made would look led backlit. (You can use it btw)

Sphere's PCB projects.
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Sphere’s socket 5/7 cpu collection.
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SUCCESSFUL K6-2+ to K6-3+ Full Cache Enable Mod
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Tyan S1564S to S1564D single to dual processor conversion (also s1563 and s1562)

Reply 33 of 39, by Veeb0rg

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I got some made but missed the serialization option so they've got that going. I ordered some Q2 versions without the serialization option this time, they'll be here in a week or so.

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Reply 35 of 39, by Tevian

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Veeb0rg wrote on 2024-06-17, 19:50:

I got some made but missed the serialization option so they've got that going. I ordered some Q2 versions without the serialization option this time, they'll be here in a week or so.

No!!! 🤣. Why can't they just put the serial numbers on the back side?!

Ya, the addressable LEDs could easily go on the fan version. I might do it when I get some time. 😎

Reply 36 of 39, by Tevian

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Sphere478 wrote on 2024-06-03, 04:01:

Oooo very very cool!

Wonder how that 3dfx logo I worked on on the bridge I made would look led backlit. (You can use it btw)

I was worried about how much light would shin through, but using the right-angle LEDs had more than enough light! What I don't know is if the PCB manufacturer will silkscreen without a mask layer behind it...

Reply 37 of 39, by Veeb0rg

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Tevian wrote on 2024-06-23, 06:56:
Veeb0rg wrote on 2024-06-17, 19:50:

I got some made but missed the serialization option so they've got that going. I ordered some Q2 versions without the serialization option this time, they'll be here in a week or so.

No!!! 🤣. Why can't they just put the serial numbers on the back side?!

Ya, the addressable LEDs could easily go on the fan version. I might do it when I get some time. 😎

They never did it before, it must be a new thing which is why I missed it. *shrug* its not expensive just takes a bit of time.

Reply 38 of 39, by pentiumspeed

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What's the nm of these yellow LEDs?

I have done quite much research but none agreed on what nm of the spectrum that covers yellow region on the 'net.

By the way, 620nm is bit not quite red as it is tinges of orange still. Going farther red in nm looks better. Like 630nm to 660nm range, beautiful red. Anything farther does not improve red.

Cheers,

Great Northern aka Canada.