Search found 493 matches

by fitzgreyve
Mon Sep 16, 2019 3:53 am
Forum: Music Tech DIY
Topic: Where do you start with making panels?
Replies: 5
Views: 543

I know a lot of people don't like PCB (FR4) panels, but if I needed to panel mount a ZIF socket, I think I would take the PCB panel route. Solder the ZIP connector to the PCB (panel) as if it were a normal through-hole PCB, adding any other componets to the "bottom" of the PCB, possible via surface ...
by fitzgreyve
Sun Sep 15, 2019 11:28 am
Forum: Music Tech DIY
Topic: [BUILD] 100m-ish LFO
Replies: 47
Views: 3522

Re: PCBs still available?

MuadMusic wrote:Also, are the PCBs/PICs still available for sale? How might I order?
No problem with PICs, but the PCB's are currently out of stock, but if you are interested I'll order a new batch (approx. 3-4 week lead time).

If that is OK for you, let me know what you need via PM, and I'll start the process.
by fitzgreyve
Fri Aug 16, 2019 4:07 am
Forum: Music Tech DIY
Topic: [BUILD] 100m-ish Output Mixer (M-131) in euro
Replies: 63
Views: 3571

Yup, it was indeed dead. All sorted now. Thanks! Good news. Any updates on black panels for your modules? If there is sufficient demand, I'm happy to do a run of white on black FR4 panels for any of my modules, but I really need a minimum of approx. 5 of each module to make it break even. Anyone el...
by fitzgreyve
Thu Aug 15, 2019 6:34 am
Forum: Music Tech DIY
Topic: [BUILD] 100m-ish Output Mixer (M-131) in euro
Replies: 63
Views: 3571

Hi, I've built two of these, one of which has suddenly dropped output level on the stereo and mono outputs, as well as headphones. Even with everything up full it is still considerably under unity gain. Any idea what could be causing this? If all of the outputs are affected (assuming no issue with ...
by fitzgreyve
Wed Aug 14, 2019 5:03 am
Forum: Music Tech DIY
Topic: The 2019 Show Us Your DIY Builds Thread
Replies: 356
Views: 46378

A couple of new builds - first the diode filter from the PE Minisonic Synth (at some point I may get around to doing the EG/VCA and VCO's as separate modules). VCF core runs on the original +9V/-6V supply and I've included a built in noise source. Panel decal/transfer shrunk a bit (old stock). It wi...
by fitzgreyve
Thu Aug 01, 2019 4:42 am
Forum: Music Tech DIY
Topic: Anyone diagnose/repair DIY LW / 4U modules for cash? (Usa)
Replies: 5
Views: 602

RESONATOR: On the ("official" euro version of the) resonator, the four boards can be easily separated as they interconnect using an IDC cable - but looks like they are hard wired here ? Yes, that lower PCB does look very close to the edge of the panel - however the only "copper" right at the edge of...
by fitzgreyve
Wed Jul 31, 2019 10:49 am
Forum: Music Tech DIY
Topic: prototype panel material?
Replies: 8
Views: 724

For prototypes (only!) - 2mm cardboard. Glue print of panel to it, punch out holes (I use a hole punch intended for leather work), cut to final size, fit panel components. Not strong enough for extended use, but fast and cheap. EDIT - Sorry- just noticed you already use cardboard! (or don't think it...
by fitzgreyve
Thu Jul 04, 2019 4:35 am
Forum: Eurorack Modules
Topic: Osc/synth voices with built in quantizers
Replies: 16
Views: 718

Frequency Central waverider VCDO CV input is semitone quantisized.
by fitzgreyve
Mon Jun 10, 2019 2:57 am
Forum: Music Tech DIY
Topic: Recommend a magnifier for SMT work?
Replies: 23
Views: 1052

(in the UK) I have a Rolson magnifier headset. Comes with four lenses of which two can be installed at once giving from x2 up to x20 (which is fairly extreme for general use). Higher magnifications have more limited depth of field.
by fitzgreyve
Thu Jun 06, 2019 4:36 am
Forum: Music Tech DIY
Topic: Reliable source for creating ground loop/mains hum?
Replies: 9
Views: 540

I've read in a number of sources that what you hear is mostly the first harmonic - for you that would be 120Hz https://www.muffwiggler.com/forum/userpix2/12284_220pxmains_hum_spectrum_1.png Sorry, Doesn't help with actually generating it, however a mix of fundamental and first harmonic (sines) has a...
by fitzgreyve
Wed Jun 05, 2019 9:57 am
Forum: Music Tech DIY
Topic: a legend is back...System-700 in eurorack
Replies: 150
Views: 14849

Re: a legend is back...System-700 in eurorack

tobb wrote: Ah great,so with ua726 in the vco?
A quick look at the PCB picture would indicate otherwise ?
by fitzgreyve
Mon Jun 03, 2019 3:17 am
Forum: Music Tech DIY
Topic: my weekend meta-project: magic panel PCB generator for Eagle
Replies: 50
Views: 2787

With Seeed, they want you to add margin areas above and below the panel, in board outline, and label them MARGIN. If you do this, they'll put the board ID in that area. With Seeed, I just put a note in the gerber "Please put production ID on PCB bottom" (silk screen layer, outside the board outline...
by fitzgreyve
Tue May 28, 2019 8:32 am
Forum: Music Tech DIY
Topic: The 2019 Show Us Your DIY Builds Thread
Replies: 356
Views: 46378

Original Digisound 80-17 Reverb PCB repackaged for Eurorack. The add-on PCB is a duplicate output filter for stereo out, plus CV control of Delay (I basically just put a vactrol across the clock frequency control resistor). Switches add "echo" mode and choice of feedback stage. https://www.muffwiggl...
by fitzgreyve
Thu May 02, 2019 3:37 am
Forum: Music Tech DIY
Topic: [PCBs] Euro USB MIDI host
Replies: 5
Views: 697

Hi I have been looking for some affordable way to bridge some USB pedal controllers (aircraft xyz) to MIDI. So I wonder if I could use this board: I guess the firmware will need to be ajusted? This would need reprogramming of the firmware in the standard hobbytronics module - in essence hacking tog...
by fitzgreyve
Tue Apr 30, 2019 4:39 am
Forum: Music Tech DIY
Topic: [order] 100m-ish Audio Delay (euro) - panels are in.
Replies: 37
Views: 3585

MN3208 (obtained from Banzai Musik) is now added to the list of tested BBD ICs for this module. This provides sufficient delay to generate a "double tracking" or very short echo effect, but the delay is not long enough for any "reasonable" echo effect - the original Roland module was design as a cho...
by fitzgreyve
Fri Apr 26, 2019 3:06 am
Forum: Music Tech DIY
Topic: Sliding keyboard shelf - seeking advise
Replies: 7
Views: 544

djthopa wrote:Ikea & Ebay:
I'm using the same sliders - very good.

"ikea"- beware that a lot of ikea stuff is hollow contruction, very difficult to fix to securely.
by fitzgreyve
Wed Apr 17, 2019 11:58 am
Forum: Music Tech DIY
Topic: [order] 100m-ish Audio Delay (euro) - panels are in.
Replies: 37
Views: 3585

Looks good, at first glance I can't see anything obvious when comparing to one of my builds. OOPS - just realised I have TP1 and TP2 reversed in the calibration instructions (when you have eliminated the impossible.......). Now corrected. Sorry folks! I'm hoping things will now be OK ? What you are ...
by fitzgreyve
Tue Apr 16, 2019 11:25 am
Forum: Music Tech DIY
Topic: [order] 100m-ish Audio Delay (euro) - panels are in.
Replies: 37
Views: 3585

This is the waveform I'm getting at TP1: https://www.muffwiggler.com/forum/userpix2/1621_ds1z_quickprint4_1.png With the BBD clock circuit (4013 plus one inverter on the 4049) are you getting a nice square wave at TP2 ? (if the above is TP1, what signal are you feeding it, looks like a plain sawtoo...
by fitzgreyve
Thu Apr 04, 2019 10:26 am
Forum: Music Tech DIY
Topic: Linear to exponential converter
Replies: 13
Views: 961

I'm not 100% sure, but with the above circuit your relative LFO modulation depth (in terms of semitones or cents) on the output will vary depending on your "key" voltage - i.e. with higher key voltages the relative LFO depth on the exponential output will be propotionately less ? I don't think so. ...
by fitzgreyve
Thu Apr 04, 2019 4:28 am
Forum: Music Tech DIY
Topic: Linear to exponential converter
Replies: 13
Views: 961

I'm not 100% sure, but with the above circuit your relative LFO modulation depth (in terms of semitones or cents) on the output will vary depending on your "key" voltage - i.e. with higher key voltages the relative LFO depth on the exponential output will be propotionately less ? I first came across...
by fitzgreyve
Tue Apr 02, 2019 5:29 am
Forum: Music Tech DIY
Topic: Help me make my first pcb run!
Replies: 13
Views: 679

IMO Mutable modules are also a lot easier to assemble if the PCBs are gold plated. .. no. ENiG plating is designed to be very flat for improved performance parts on pick and place machines and is much more difficult to solder by hand. You want HASL plating for DIY boards matching whatever solder yo...
by fitzgreyve
Tue Apr 02, 2019 3:38 am
Forum: Music Tech DIY
Topic: Help me make my first pcb run!
Replies: 13
Views: 679

Would be great if you share your experiences with the final product (quality of the boards)! On quality: specifically for mutable modules, if using a chinese manufacturer I suggest that you first check the minimum width of solder mask that they can process - this is important on most Mutable module...
by fitzgreyve
Tue Apr 02, 2019 3:21 am
Forum: Music Tech DIY
Topic: KiCad templates for Euro front panels?
Replies: 8
Views: 1494

Is there a good way to go from parts PCB to panel PCB so that the holes automagically appears where they should to fit with the components coming through? I would consider going "the other way around"? Get your panel layout to work ergonomically, then design the (parts) PCB to match it - that's wha...
by fitzgreyve
Mon Mar 25, 2019 4:17 am
Forum: Music Tech DIY
Topic: The 2019 Show Us Your DIY Builds Thread
Replies: 356
Views: 46378

Checking out your blog for more info now... Looking for a video.... Can you confirm that the MN3009 works in these? Or a better question would be, what chips do you have in these three BBD delays? No video (yet), but some very basic sound samples on my blog. I currently have fully working modules w...
by fitzgreyve
Sun Mar 24, 2019 9:58 am
Forum: Music Tech DIY
Topic: The 2019 Show Us Your DIY Builds Thread
Replies: 356
Views: 46378

You wait for a BBD based delay and then three come along at once.....
Image

(Each fitted with a different BBD)

Go to advanced search