Lyra-8 DIY expansion and panels

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Flounderguts
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Lyra-8 DIY expansion and panels

Post by Flounderguts » Thu Jul 09, 2020 3:29 pm

Hi All...

If you've followed the Lyra-8 DIY thread at all, you'll know that I've been working on a set of PCBs that incorporate all of Vlad's "tweaks."

My PCB manufacturer has a minimum order of 10 sets, and I only need one. Some people have messaged me about getting a set. I have one set left. Pls let me know if you want the set ($20 + shipping) which will come with a BOM. If you are on the list here and you DON'T WANT TO BE, let me know please!

1. Reserved for me * **
2. D. Tilbury * **
3. Patljuchte
4. Stoneyards * **
5. Sanemulkavian
6. Funketek
7. Addam * **
8. whyfarer * **
9. teleport * **
10. prunesquallor

I spec'd the expansions with SP8T switches that were available from Adafruit. They seem to be out, but the switches are easy to find on AliExpress and other places. They are known as SR-16 1P8T. I have a supplier that can get me the switches pretty cheap, but shipping gets ridiculous these days. The panels have 10 of these switches (delay, distortion, and 8 voices) which I could supply with the panels for $18 for all 10. I'd need just about everyone to opt-in, though...MOQ! Switches will be available from me :yay:
Another component that I spec'd is the Phoenix Contacts SMT wire terminal header, and there are 40 in the BOM. Alas, a bulk order of these only saves $5.20 per person, so it doesn't seem worth it. (working on it anyway)

There are 2 panels for the expansion, as well. They both should fit a 19" rack. The main panel mounts the tweaks to either side of the Lyra-8 mainboard. They are made of PCB material in white, with black silkscreen and gold ENIG. To go with that, there is a 1U I/O panel that has all of the jacks from the back of the Lyra (including headphone), the power switch, and 8 toggle switches that you can use to short out the pads (as coins won't sit on vertical contacts!)
Main panel: $80 *
I/O panel: $25 **

People on the expansion list get first dibs on these!

And I also had some STANDARD Lyra-8 DIY panels made. They are black PCB with white silkscreen and ENIG Gold logos. They measure 10.67" x 10.67" (266x266 mm) and are drilled at the corners for mounting in to your own case. There is no I/O for this, you'll have to make your own. If enough people want it, I'd be happy to lay out a rear PCB for that...

1. pendergast
2. steviet
3. D. Tilbury
4. whyfarer
5.
6.
7.
8.
9.
10. reserved

I will update this post as required...please PM me if I missed you! My paper list of people was pretty mangled by the time I got to writing this up :bang:
Last edited by Flounderguts on Fri Jul 31, 2020 1:36 pm, edited 12 times in total.
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Re: Lyra-8 DIY expansion and panels

Post by Flounderguts » Thu Jul 09, 2020 3:30 pm

lyra standard black.jpg
Render of the standard panel
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Re: Lyra-8 DIY expansion and panels

Post by Flounderguts » Thu Jul 09, 2020 3:34 pm

panelbwcnoss.jpg
The rendering engine on EasyEDA can't display soldermask exclusions over silkscreen...here's a render of the panel with the silkscreen, and with it removed...the gold under the black will show up coming through it.

This is the expansion, tho.

panel bwc.jpg
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Re: Lyra-8 DIY expansion and panels

Post by Flounderguts » Thu Jul 09, 2020 3:42 pm

Here's the 1U I/O ...

It's hard to see, but there's a pattern under the soldermask...the two gold cubes on the right are repeated under the soldermask across the whole board...


io.jpg
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teleport
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Re: Lyra-8 DIY expansion and panels

Post by teleport » Thu Jul 09, 2020 3:48 pm

Hi - I'd be interested in joining the list for the tweaks expansion set and associated panel.

Am I understanding correctly that the tweaks are pcb's that are additional to the main board? I've got an unbuilt main Lyra-8 and this feels like some good motivation to get it underway.

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Re: Lyra-8 DIY expansion and panels

Post by Flounderguts » Thu Jul 09, 2020 3:50 pm

Yes...the tweaks are outlined in Vlad's assembly document. I just catalogued them and chose values. I'll post renders of the wings in a few minutes. Do you want the I/O as well?
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Re: Lyra-8 DIY expansion and panels

Post by whyfarer » Thu Jul 09, 2020 3:54 pm

I am (still) interested in the expansion PCBs!

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Re: Lyra-8 DIY expansion and panels

Post by Flounderguts » Thu Jul 09, 2020 3:56 pm

Attack Release Fast Release Slow PCB. Switches to turn them from stock to tweaked.
expansion a.jpg

Voices, Delay, Distortion. The original values are marked on the panel, and there are switches to stock values on the voice pots.
expansion b.jpg
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Re: Lyra-8 DIY expansion and panels

Post by teleport » Thu Jul 09, 2020 4:15 pm

Flounderguts wrote:
Thu Jul 09, 2020 3:50 pm
Do you want the I/O as well?
Yes - I'd definitely be interested in the i/o. Thanks!

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Re: Lyra-8 DIY expansion and panels

Post by Addam » Thu Jul 09, 2020 6:00 pm

can't wait for this. I'm down for pretty much any additional "group buy" for additional parts like switches mentioned, too. Have plenty of resistors, though :hihi:

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Re: Lyra-8 DIY expansion and panels

Post by Stoneyards » Thu Jul 09, 2020 6:03 pm

Yeah, me too - I'm in for main expanded panel, io panel, switches, headers or other less common parts.

thanks!

[edit to add panel details]

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Re: Lyra-8 DIY expansion and panels

Post by steviet » Thu Jul 09, 2020 8:00 pm

I sent you a PM, but just to get it on the public register take me off the list for the PCB and put me on the list for one of the STANDARD Lyra-8 DIY panels.
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Re: Lyra-8 DIY expansion and panels

Post by yan6 » Thu Jul 09, 2020 9:10 pm

Any chance this is compatible with a factory built lyra8

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Re: Lyra-8 DIY expansion and panels

Post by Flounderguts » Thu Jul 09, 2020 9:20 pm

yan6 wrote:
Thu Jul 09, 2020 9:10 pm
Any chance this is compatible with a factory built lyra8
The expansion should work with a factory instrument, but you will have to perform some surgery on it, and find a way to mount the panels in an expansion box or extension. If you want to try that, I'd be happy to give you the drill spacing in a dxf, pdf, or other cad file.

The hardest part will be desoldering the components out of the original board, and devising a cable with all of the connections to your expansion. There are 80 connections that have to be made (40 controls, 2 wires each)
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Re: Lyra-8 DIY expansion and panels

Post by D.Tilbury » Fri Jul 10, 2020 5:46 am

You did a killer job with these man. Really stoked about getting this going. Thank you.
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Re: Lyra-8 DIY expansion and panels

Post by Flounderguts » Fri Jul 10, 2020 9:57 am

Just got a really nice email from Mr. Henry at Daier Yuqing. Switches are a go, and they should ship sometime today :yay:

I'll figure out the costs once they get here...they may be subject to a tariff...but I can't comment on that because politics.
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Re: Lyra-8 DIY expansion and panels

Post by Flounderguts » Mon Jul 27, 2020 11:46 am

Panels have arrived.
20200727_103312.jpg
20200727_103349.jpg
20200727_103258.jpg
20200727_103359.jpg
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Re: Lyra-8 DIY expansion and panels

Post by Flounderguts » Mon Jul 27, 2020 11:48 am

Standard front panel looks amazing!
20200727_102853.jpg
20200727_102859.jpg
20200727_102906.jpg
20200727_102915.jpg
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Re: Lyra-8 DIY expansion and panels

Post by Flounderguts » Mon Jul 27, 2020 11:54 am

Unfortunately, the expansion front panel has a terrible mistake.

Can you see it?
20200727_102954.jpg

If you look above the right hand "pitch" knob, you will see that the "hold" is offset to the right. I must have bumped the footprint with the mouse, and I missed it in the proofs!
20200727_102958.jpg
If you want one of these blem panels (which would require a drill and perhaps an adhesive sticker) you can have one for price of shipping.

The silkscreen over the soldermask also isn't well aligned:
20200727_103005.jpg
20200727_103011.jpg

I have already ordered them in black to replace these (oof...that was a bit expensive!!) and they should be here in (another!) two weeks. And yes, I fixed the hold hole AND ordered matching black I/O panels.
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Re: Lyra-8 DIY expansion and panels

Post by Flounderguts » Mon Jul 27, 2020 11:56 am

The white I/O panels are absolutely spectacular, though!!
20200727_103200.jpg
20200727_103153.jpg
20200727_103207.jpg

I really like how the copper under the soldermask looks...very subtle pattern.
20200727_103226.jpg
I will be building up the wings by the end of the week, with a full photo tutorial of the build, which I will post on my website and link to this thread when it's done.
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Re: Lyra-8 DIY expansion and panels

Post by whyfarer » Mon Jul 27, 2020 2:42 pm

thanks for the updates, flounderguts. sorry to see/hear the hold misalignment.

If possible, can you add me to both panel purchases? they're looking great

edit: thanks!

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Re: Lyra-8 DIY expansion and panels

Post by Stoneyards » Tue Jul 28, 2020 2:11 pm

Yes, great to see the progress - thanks for the refinements. It's a complex thing to do. Looking forward to the final product!

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Re: Lyra-8 DIY expansion and panels

Post by steviet » Tue Jul 28, 2020 3:20 pm

Thanks for all your work! That standard panel looks amazing. Can't wait to get mine!
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Re: Lyra-8 DIY expansion and panels

Post by Flounderguts » Thu Jul 30, 2020 12:38 am

The good thing about messing up is that I get to mock it all up before hand. There were no other issues, but the panels were *awfully tight* inside the rack...I made a little extra space on each side, and shimmied section A (on the left) down a few mm.

I also tested it with the switches, and they align perfectly and are actually long enough to get the nut on!

Here's one of the blems mocked into a rack:
20200729_231035.jpg

And here's a switch going through the wing and the front panel...I was nervous that the nuts might not catch on the plastic bushing.
The switches have a nub on the front to index them, and the drilling is there on the panel, so we aren't depending on the bushing friction to hold the switch from rotating when you wiggle.
20200729_231107.jpg
Speaking of switches, I bought a bunch to go with the expansions, as the two US distributors of these have spotty inventory.
20200729_231124.jpg
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Re: Lyra-8 DIY expansion and panels

Post by Bjarne » Thu Jul 30, 2020 1:57 am

Yes, your standard panel design looks absolutely fabulous!

I note that you’ve skipped the screw holes for the 4 stand offs that normally hold the main board. Are they not needed?

Cheers
Flounderguts wrote:
Mon Jul 27, 2020 11:48 am
Standard front panel looks amazing!

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