Search found 150 matches

by sines
Fri Dec 13, 2019 8:38 pm
Forum: Music Tech DIY
Topic: Buchla 100 clones: 158, 180, 140, 156, 106, etc. DEMOS
Replies: 810
Views: 46072

191 Grayhill Switch wiring

I can't seem to wrap my thick skull around how to wire the 24 wires onto the Grayhill switch. I had a momentary "a Ha!" moment followed by "oh fuck, that's not right at all". Every photo of this switch is a pile of yellow or multi-colored spaghetti so it's impossible to use a visual guide to follow ...
by sines
Fri Nov 22, 2019 4:26 pm
Forum: Music Tech DIY
Topic: 808 hihat clone PCB set
Replies: 64
Views: 7494

So you're generating sound. Try running an LFO to trigger and probing that way. My guess is one of those transistors is the culprit - either because it got fried when some leads got bridged or because it's in there backwards. Stupid fix. I didn't reverse the 2n3904 +2n3906's and thus, transistors w...
by sines
Fri Sep 27, 2019 10:22 am
Forum: Music Tech DIY
Topic: Buchla 100 clones: 158, 180, 140, 156, 106, etc. DEMOS
Replies: 810
Views: 46072

sines looks great. I heard some nice sounds of yours on Instagram too :tu: I run all of this from a 1.5A PSU with no problems: https://www.muffwiggler.com/forum/userpix2/28868_systeme_1.jpg I received the 1.5A PSU which was nice and hefty. I wired up a similar Power One supply for my MCI console [w...
by sines
Fri Sep 27, 2019 10:09 am
Forum: Music Tech DIY
Topic: 808 hihat clone PCB set
Replies: 64
Views: 7494

thanks revok & 555x555 for your help. Got sidetracked with my Buchla 100 series builds which have thankfully been doing well. I just reflowed everything on the bottom side of both PCBs, and noticed I had bridged 3 transistors [2n3904s, subbing for bc547]. Nothing is warm to the touch, and I still he...
by sines
Thu Sep 26, 2019 8:36 pm
Forum: Music Tech DIY
Topic: Buchla 100 clones: 158, 180, 140, 156, 106, etc. DEMOS
Replies: 810
Views: 46072

rosch wrote:I've never come across Tiny Jax before, they look like they work with normal 1/8" euro patch cables, correct?
This explains all of the differences between these similar looking jacks.
viewtopic.php?p=1429841
by sines
Thu Sep 26, 2019 1:20 pm
Forum: Music Tech DIY
Topic: Buchla 100 clones: 158, 180, 140, 156, 106, etc. DEMOS
Replies: 810
Views: 46072

sines looks great. I heard some nice sounds of yours on Instagram too :tu: I run all of this from a 1.5A PSU with no problems: Nice! Given that I have two or three other supplies for the 200 series modules I have on the back burner, I should be able to do just fine for now. One thing I was thinking...
by sines
Thu Sep 26, 2019 10:43 am
Forum: Music Tech DIY
Topic: Buchla 100 clones: 158, 180, 140, 156, 106, etc. DEMOS
Replies: 810
Views: 46072

sines I use the 1.5A version of this to power 20u worth of modules: https://www.mouser.es/ProductDetail/Bel-Power-Solutions/HC15-3-AG?qs=sGAEpiMZZMtl%252B%2Ft8G5TWgOwb%2Fg65SZxkC5ezCISNKQ8%3D I ordered the 1.5A version, now thinking I should have got the 3A version, but managed to switch the pinout...
by sines
Tue Sep 24, 2019 10:47 am
Forum: Music Tech DIY
Topic: Buchla 100 clones: 158, 180, 140, 156, 106, etc. DEMOS
Replies: 810
Views: 46072

Is that 15V Regulator for people who power just a few? With the big 15V psu I only need the 24v for the reverb etc, right? Correct on both accounts. Modular Addict stocks a smaller PCB that has both 15v and 24v regulators. Rosch what "big" 15V PSU are you using? I have healthy number of modules, de...
by sines
Tue Sep 24, 2019 12:17 am
Forum: Music Tech DIY
Topic: Buchla 100 clones: 158, 180, 140, 156, 106, etc. DEMOS
Replies: 810
Views: 46072

Ampere settings state how much current a PSU can deliver at best - not what it pumps into a circuit. That would be voltage. So a higher ampere rated PSU will not be a problem, only higher voltage can and probably will fry your modules. Lower current would let your modules starve. Thank you! Welp, t...
by sines
Sun Sep 22, 2019 7:23 pm
Forum: Music Tech DIY
Topic: Buchla 100 clones: 158, 180, 140, 156, 106, etc. DEMOS
Replies: 810
Views: 46072

158A - Electrolytics for Tantalum?

Hi Dan / et al, I am 2 56uF tantalum capacitors shy of completion of my 158A; can I temporarily [or hopefully, long term] substitute 47uF electrolytics for a couple of days to at least hear it, or will this do some damage elsewhere in the mix? It is for C5, C4 are already correctly installed as tant...
by sines
Thu Sep 19, 2019 12:38 pm
Forum: Music Tech DIY
Topic: 808 hihat clone PCB set
Replies: 64
Views: 7494

https://www.muffwiggler.com/forum/userpix2/1263_081205b48011480aac8cbac98c1b2939_1.jpg https://www.muffwiggler.com/forum/userpix2/1263_2a52909a381d4cc3bfeda1800f12ef73_1.jpg https://www.muffwiggler.com/forum/userpix2/1263_2f87371e41cb4d49b529b9fd09b89130_1.jpg Here’s my next build. I am once again ...
by sines
Tue Sep 17, 2019 10:08 am
Forum: Music Tech DIY
Topic: yet another 808 kick clone PCB set
Replies: 66
Views: 7983

looks like falafelbiels hasn't been around in over a year. Anyone else have any ideas?

EDIT: also replaced all 2n3904s + 3906s [aka the bc547s + bc557]

The negative pin on the header marked (-) does not have any voltage.
by sines
Mon Sep 16, 2019 1:10 pm
Forum: Music Tech DIY
Topic: yet another 808 kick clone PCB set
Replies: 66
Views: 7983

Sorry to resurrect this old thread, but I just got a PCB set and stuffed it with all the parts I had on hand. I temporarily subbed a TL072 instead of the LM358. I used SMD0805 components for many of the resistors where they were standing upright. I am using a B10k pot with a 7.5k resistor strapped a...
by sines
Fri Jun 21, 2019 8:41 am
Forum: Music Tech DIY
Topic: Buchla 100 clones: 158, 180, 140, 156, 106, etc. DEMOS
Replies: 810
Views: 46072

I want sequence to skip a note without emitting a pulse or voltage for that step, but continue in time. Which is how the Korg SQ-1 functions to some degree. Any ideas? I guess the thing is that the SQ-1 is digital and implementing the same behaviour with analogue electronics is a little complicated...
by sines
Thu Jun 20, 2019 4:59 pm
Forum: Music Tech DIY
Topic: Buchla 100 clones: 158, 180, 140, 156, 106, etc. DEMOS
Replies: 810
Views: 46072

sines looks and sound nice! I guess you can ignore my comment about the 245. I cannot remember how that thing works :doh: The core of the 245 is pretty similar to the 123 as far as I can see. The 245 switches are not stage select but loop boundary switches. There's one switch between each consecuti...
by sines
Thu Jun 20, 2019 10:01 am
Forum: Music Tech DIY
Topic: Buchla 100 clones: 158, 180, 140, 156, 106, etc. DEMOS
Replies: 810
Views: 46072

sines looks and sound nice! Thanks! I guess you can ignore my comment about the 245. I cannot remember how that thing works :doh: Unfortunately, the switch would have to act like a mute, but not sure what it would mute since the next voltage stage generates 3 voltages as well, unless it made a volt...
by sines
Thu Jun 20, 2019 8:35 am
Forum: Music Tech DIY
Topic: Buchla 100 clones: 158, 180, 140, 156, 106, etc. DEMOS
Replies: 810
Views: 46072

sines Maybe have a look at the Buchla 245 schematic. I think it has a function similar to what you are after. It has 4 toggle switches for the stage select inputs, is that what you’re referring to? I’m not sure if that will work. Here’s the 123 (minus 16 Davies knobs on the way) https://vimeo.com/3...
by sines
Fri Jun 14, 2019 9:21 am
Forum: Music Tech DIY
Topic: Buchla 100 clones: 158, 180, 140, 156, 106, etc. DEMOS
Replies: 810
Views: 46072

sines I do not have a 111 handy , nor can I locate my notes on calibration. I built that module a while ago. You are right in expecting it to be easy to locate proper calibration instructions, so I apologize for not having that in order. In any case, setting up the 111 is not difficult. It seems da...
by sines
Thu Jun 13, 2019 10:40 am
Forum: Music Tech DIY
Topic: Buchla 100 clones: 158, 180, 140, 156, 106, etc. DEMOS
Replies: 810
Views: 46072

100 Series Calibration Docs

Any tips/pics re: the lamps & LDRs on the 192? Should I use heat-shrink tubing, or have you found something better? Should the lamp & LDR be touching, or how close should they be? Heat shrink is ideal. You just have to make sure that the LDR is not exposed to external light. Put them as close toget...
by sines
Fri Mar 29, 2019 2:35 pm
Forum: Music Tech DIY
Topic: DIY JPTR 8 clone *** New VCO Core Picture ***
Replies: 421
Views: 41883

Boogie wrote:Image
me and a friend could spruce for 2-4 JPTR-8s.. SMD please!
by sines
Wed Mar 27, 2019 11:17 pm
Forum: Music Tech DIY
Topic: [PCBs] The Postman Envelope Gen -- a simple QUAD AR
Replies: 251
Views: 17182

hexinverter wrote:hexinverter
Wondering, is there a way to make the Postman EG loop? By feeding the Output back into the Gate input? Would love to mod this with a ON/ON/ON[?] switch to allow for this mode but not quite sure if it's possible or not. Thoughts?
by sines
Tue Feb 26, 2019 11:39 pm
Forum: Music Tech DIY
Topic: µDervish: 8HP FV-1 euro FX
Replies: 142
Views: 14471

3x Partial Kits please!
by sines
Tue Feb 12, 2019 11:39 pm
Forum: Music Tech DIY
Topic: [Now shipping!] Orbitals -- eurorack DIY step-sequencer
Replies: 391
Views: 39180

Wondering if you saw this:
http://4ms.org/?p=285

Source for non-latching ON-Mom switches:
https://www.mouser.com/ProductDetail/612-LP4OA1PBCTR
by sines
Wed Dec 19, 2018 9:37 am
Forum: Music Tech DIY
Topic: Has anyone done a Buchla 227 clone?
Replies: 15
Views: 2743

sempervirent wrote:The 227r rev2 BOM lists 2S-AVU-000-AW-U as the part number. Past group buy threads also include that part number. Brand is Modutec / Jewell.
Thanks again, I forgot you told me this in the *other* Buchla parts thread.
viewtopic.php?t=194541

On the lookout. ;)
by sines
Mon Dec 17, 2018 9:30 am
Forum: Music Tech DIY
Topic: Has anyone done a Buchla 227 clone?
Replies: 15
Views: 2743

I have now bought the wrong VU meters not once, but twice on eBay. What is the correct model number Modutec VU meters? They are *not* these, btw: https://www.ebay.com/itm/Modutec-panel-mount-VU-meter-3-E-5/192232558778 Side note, I have 2 that have shrunk by 66%, perhaps someone wants to make a smal...

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