Gristleizer PCB group buy? Who's interested?

[Derringer]

what happens to the signal when you turn the switch to an unused position?

Did you jumper the unused positions to default back to the nearest connection?

[Taylor]

Derringer, I'll post links to the right parts when I'm done with the PCB, with a Mouser part number, and when available, a Small Bear number for people who prefer to buy from SB.

The rotary switches have a special washer with a little tab that allows you to set the switch for only as many positions as you need. I think setting the switch to an unused lug would disconnect the LFO from the FET.

[Derringer]

cool thanks

I found the DP6T switch at SB ...  the ones at Mouser are actually more expensive

[jacobyjd]

what happens to the signal when you turn the switch to an unused position?

Did you jumper the unused positions to default back to the nearest connection?

Unused positions just disconnect the LFO No harm done, no real change to the signal.

[Taylor]

Thought you guys might like a sneak peak.




It's not quite done, need to fix some pads that are a little too big and overlapping each other, add the pads for the 2 switches, and just go over it more to make sure everything's right.

Overall I think it's coming out pretty well. It's only 3.2" x 2.2" (RG's recommended board size for fitting into BB enclosures). It allows for board mounting of the 4 things I think most people would want to board-mount, but also has spots for trimpots for everything that's a trim in the original. I designed it for a specific trim pot type, which I will give you guys the part number for, but I also added pads that should accept the other common trimpot size. Of course, you don't need to board-mount anything if you don't want to, and the board isn't any bigger than it needs to be to accommodate  the onboard pots.

I have integrated the flashing LED, the optional LFO cap for de-ticking, and the charge pump to derive -9v from a single-sided supply.

One thing I wanted to do but couldn't is make the pot pads more universal. They are setup for Alpha's 16mm pots, which I think are the most common pc mount pots for pedals (again, I'll post part numbers for these). I wanted to allow for the tiny little green ones ala ZVex, but I just couldn't fit the pads in there and still have the pads big enough to solder onto. As much as I want this to be as universal as possible, I don't want to sacrifice ease of soldering just to allow for lots of obscure parts.

Let me know what you think.

[jacobyjd]

It looks good--any plans for ground planes?

[Taylor]

Yeah, I was thinking about it. Just need to figure out how to do it. This program I'm using is very powerful, but I just started learning it recently.

[Taylor]

Ok, the board is done. I'll be ordering a prototype, which will take a few weeks to get, and if it's good, I'll order the full run. Once those are in, I'll start taking orders. So I guess that means it'll be around a month and a half before I can start sending boards out.

I have implemented the ground pour, btw. It wasn't possible to do an entire layer of ground plane, since this is only a 2-layer board, but I think it should do the job reasonably well.

[Skruffyhound]

Good job. Let us know when you are ready for some cash, and don't sell yourself short on the postage. I'll go ahead and order the few parts I'm missing. Put me down for 2 boards. Thanks

[Ben N]

Yup, say the word and my Paypal finger is ready.

[PB Wilson]

This is gonna make for a nice holiday gift to myself. Keep us posted on the details.

[jacobyjd]

Sounds fantastic, Taylor--thanks for your work on this! I know there are a bunch of us who appreciate it!

I'm ready to pick up at least one. I kind of want to experiment with a second though...I could see some cool stuff happening with parallel processing/multiple LFOs with these things.

[Strategy]

I can probably only afford one, but Portland is crazy for noise music, I know that I probably have friends who would jump at the chance to have me build them a musical device of Throbbing Gristle lineage/pedigree/relation.

It's noise band heaven over here in Cascadia for sure, the weirder and more custom the FX the better, for most good local bands.

- Strategy

[mr.adambeck]

I may be interested in one or two of these...  I've checked the thread, and maybe I'm missing it by trying to skim through 7 pages quickly, but any idea of a cost estimate?

[jacobyjd]

I may be interested in one or two of these...  I've checked the thread, and maybe I'm missing it by trying to skim through 7 pages quickly, but any idea of a cost estimate?

I'm pretty sure $12 is the current estimate

[Taylor]

Yep.

[TheCowGod]

Just came across the Gristleizer build report thread, decided I wanted to build one, then found this thread. Perfect. I'm definitely down for two if they're in the $12 range.

Dan

[Taylor]

Got the proto board, building it tonight...

[Derringer]

awesome


thanks for the update

[Skruffyhound]

Gristleizertastic!