Search found 495 matches

by thx2112
Sun Nov 04, 2018 9:36 am
Forum: Music Tech DIY
Topic: Mechanical Music Modules
Replies: 35
Views: 2092

Check out Raymond Scott / Manhattan Research.

He was making electronic music using mechanical sequencers in the 50's.

[video][/video]
by thx2112
Fri Oct 05, 2018 6:24 pm
Forum: Eurorack Modules
Topic: Get rid of your euro rack rash!
Replies: 77
Views: 16004

In the back bin of an old-school electronics supplier that should have gone out of business years ago I found some black m2.5 fiber washers that had "shoulders" that separated the bolt from the panel on the inside of the mounting hole -- so there wouldn't be rack-rash on the inside of the panel hole...
by thx2112
Sun Sep 23, 2018 1:29 pm
Forum: Music Tech DIY
Topic: DIY Audio Mixer with "LOGARIZING" resistors?
Replies: 8
Views: 1214

Re: DIY Audio Mixer with "LOGARIZING" resistors?

This circuit is used in a DIY kit in Eurorack Tile format. It's never wrong to give builders options -- especially since audio-taper long-neck 9mm pots (used in tiles) can be hard to get. Eurorack modules almost always have buffered outputs -- nobody is going to plug a guitar directly into this. :ba...
by thx2112
Sat Sep 22, 2018 7:32 pm
Forum: Music Tech DIY
Topic: DIY Audio Mixer with "LOGARIZING" resistors?
Replies: 8
Views: 1214

I still use the B10Ks on these builds because the curve "feels" better than with A10Ks or A100Ks. Originally the "logarizing" resistor was there just-in-case.

This trick didn't work as well in any other non-audio-signal circuits such as an LFO speed control.
by thx2112
Sat Jun 23, 2018 8:03 pm
Forum: Music Tech DIY
Topic: Wire Sources in Canada?
Replies: 9
Views: 642

Check for local electronics suppliers with storefronts. There's probably a few within easy driving distance. Mode Electronics (Canadian parts distributor) lists these places in BC: http://mode-elec.com/Distributors/Atl__ ... /b_c_.html

And Vancouver has Lee's.
by thx2112
Sat May 19, 2018 7:43 am
Forum: Eurorack Modules
Topic: New 1U Tile Modules from PulpLogic/Erthenvar
Replies: 40
Views: 5627

There's a few new guys making 1u Tile modules.

I've been putting out modules to build a complete modular synth out of just tiles.

I had to build a tile-only case because I ran out of rows in my rack.

Image
by thx2112
Tue Apr 24, 2018 7:15 am
Forum: Music Tech DIY
Topic: Testing DIY PSUs
Replies: 12
Views: 754

Here's testing a power supply with an electronic load on the +12V rail, and a resistive load on the -12V. https://i.imgur.com/0giTguzl.jpg The electronic load is in the brown case on the left, and resistive load is on top (being cooled by the fan inside the case. The electronic load is just one of t...
by thx2112
Fri Mar 16, 2018 7:21 am
Forum: Music Tech DIY
Topic: 3D printer - Front Panel nut keys.
Replies: 33
Views: 1619

Hey, thanks!

The first thing I did when Santa got my kids a 3D Printer was print a bunch of stubby handles for 1/4 sockets, and a 5.5mm open and closed wrench for M3 nuts. I'm surprised at how strong PLA turned out to be.

Going to try these now...
by thx2112
Fri Mar 02, 2018 6:56 pm
Forum: Music Tech DIY
Topic: Iso alcohol residue on board
Replies: 18
Views: 1158

Iso by itself isn't sufficient. You need to blot it up with something or whatever gets dissolved by the iso will just get smeared around. Try putting a tissue over the area (Kimwipes are great for this), then soak it in iso, then push the tissue around with an acid brush. Look at 10:20 here: [video]...
by thx2112
Fri Feb 16, 2018 10:27 pm
Forum: Music Tech DIY
Topic: US source for PJ398SM jacks
Replies: 23
Views: 2339

Yes, they're the ones Erthenvar has. They have a square flange under the collar instead of round.

I was wondering myself a couple weeks ago.
by thx2112
Fri Feb 16, 2018 7:14 am
Forum: Music Tech DIY
Topic: 1u Clock Tiles, Mixer Tile PCB/Panels Available
Replies: 24
Views: 1881

Yes, the MIDI Clock converts a MIDI Clock to a "DIN Sync" 24ppqn clock. The "Start/Stop" output goes high or low on a MIDI Start or Stop signal.
by thx2112
Sat Feb 10, 2018 5:27 pm
Forum: Music Tech DIY
Topic: SCI Pro One Clone - UPDATE 12/3/18
Replies: 88
Views: 8618

That's awesome! The panel artwork could use more Uncial and mitered corners. Coincidentally I'm waiting for the PCB for a new stripped-down version of the PrOne Sequencer. I kinda went overboard on the first version: https://i.imgur.com/qzW6Sohm.png I wonder if there'll be room on the panel to add o...
by thx2112
Wed Dec 06, 2017 11:15 am
Forum: Eurorack Modules
Topic: 1u Rack?
Replies: 12
Views: 714

Image

They're all ready. More info here: http://syinsi.com/new-analog-tiles/
by thx2112
Fri Oct 27, 2017 9:39 pm
Forum: Eurorack Modules
Topic: Mounting modules upside down
Replies: 18
Views: 891

But how do you keep the electrons from spilling?

(I'll show myself out...)
by thx2112
Tue Oct 24, 2017 8:33 am
Forum: Eurorack Modules
Topic: 1u Clock Tiles
Replies: 46
Views: 3026

The Generator needs all pullup/pulldowns. The input (Start/Stop) is normalled to 5V (through a pull-up resistor) so that it always runs if there isn't a cable plugged in. It also has a pulldown so it doesn't float (giving spurious random clocks) if there's a cable plugged in one one side and not the...
by thx2112
Wed Oct 11, 2017 5:13 pm
Forum: Eurorack Modules
Topic: The elusive 'all black' panel themed euro systems
Replies: 332
Views: 38915

Thx2112, love the small systems. Is that bottom one square? I hate how much I spend on power supplies but I love smaller "instruments", and mixing and matching them on the table. It's a tad out of square. The case has a custom PCB with power under each module (and a couple 10-pin headers), and is p...
by thx2112
Sat Oct 07, 2017 9:06 pm
Forum: Eurorack Modules
Topic: The elusive 'all black' panel themed euro systems
Replies: 332
Views: 38915

Those are some great looking systems and modules. I've also been sticking to the black aesthetic. https://i.imgur.com/829DLLnl.jpg For full-size modules I experimented with finishes over the past few years and now use a flat-black crinkle powdercoat with tiny crinkles to scatter any reflections, and...
by thx2112
Fri Oct 06, 2017 8:01 pm
Forum: Music Tech DIY
Topic: Which Tayda parts are worthy quality and price wise?
Replies: 18
Views: 2097

I haven't had any issues with anything there. I found the pots to be better than any of the lower-cost Digikey/Mouser pots. The (large) caps have surprisingly low ESR. I noticed that they started carrying Panasonic caps too. Switches are identical to the CK switches from Digikey (feel and all). Resi...
by thx2112
Fri Oct 06, 2017 7:36 pm
Forum: Music Tech DIY
Topic: toaster oven SMT
Replies: 28
Views: 2171

I have an oven ready to go, but hot air is fast and convenient -- and I can handle tombstones and misalignments as they happen. Single panels are done with a syringe, and batches are done with a mylar stencil. I found that with the stencil there are no tombstones or misalignments (probably because t...
by thx2112
Tue Aug 22, 2017 4:18 pm
Forum: Music Tech DIY
Topic: New 1U Tile PCB/Panels: Crossfader, VCA, VCF, TUBE Overdrive
Replies: 14
Views: 2059

Okay, they're up! http://syinsi.com/projects/building-the-vcf-tile/ http://syinsi.com/projects/building-the-vca-tile/ I meant to have this up yesterday but a weird thing happened while I was fiddling with the resonance circuit of the VCF. Somehow I managed to turn off the sun! :omg: It wasn't until ...
by thx2112
Fri Aug 18, 2017 9:02 pm
Forum: Music Tech DIY
Topic: Some suggestions to kit manufacturers
Replies: 50
Views: 2529

As a builder, I want values on the PCB. There's nothing more error-prone than constantly referring to a BOM. Designations are great for prototypes or for builds where values are preferential for communication purposes. But if you're just putting together a kit and it's not working, a quick glance ov...
by thx2112
Fri Aug 18, 2017 8:05 pm
Forum: Music Tech DIY
Topic: Supplying power to breadboards/DIY PCBs
Replies: 29
Views: 2642

Same. I use them everywhere.

Image
by thx2112
Fri Aug 18, 2017 7:51 pm
Forum: Music Tech DIY
Topic: New 1U Tile PCB/Panels: Crossfader, VCA, VCF, TUBE Overdrive
Replies: 14
Views: 2059

Almost there... To make a long story short, had to get the resistor/capacitor values from the final prototypes (RIP), then build new ones from scratch to get photos and make sure the values were right (they weren't). I tweaked a bunch of other component values in the process and fixed some things th...
by thx2112
Fri Aug 04, 2017 7:19 pm
Forum: Music Tech DIY
Topic: touch interface projects ?
Replies: 27
Views: 2081

I used the CAP1188 (two, actually) for the CV Touch tile module . I initially tried using the built-in Atmel capacitive sensing but it was too finicky -- especially in a noisy Eurorack system. The specialized ICs auto-calibrate on startup and the CAP1188 has built-in LED drivers which enabled the CV...
by thx2112
Fri Aug 04, 2017 6:58 pm
Forum: Music Tech DIY
Topic: New 1U Tile PCB/Panels: Crossfader, VCA, VCF, TUBE Overdrive
Replies: 14
Views: 2059

Soonish. Had site problems a few weeks back and it got unpublished and never got restored. I've been going through the backups trying to recover manually (a few other posts went missing too), but will just put up new posts if it's taking much longer. Sorry about that.

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