Search found 2348 matches

by Jarno
Thu Jan 14, 2021 3:34 am
Forum: Music Tech DIY
Topic: Good low noise DIY linear 3A Power supply ?
Replies: 29
Views: 992

Re: Good low noise DIY linear 3A Power supply ?

I wonder how many of the commercially available equipment with toroids/linear supply have PFC. And how big a cosphi deviation actually would be from such a tiny thing. With all the fluorescent lighting being replaced with LED's, I think power companies are pretty happy already. Obviously, it needs t...
by Jarno
Thu Jan 07, 2021 8:10 am
Forum: Music Tech DIY
Topic: The 2021 Show Us Your DIY Builds Thread!
Replies: 114
Views: 5563

Re: The 2021 Show Us Your DIY Builds Thread!

Nice stuff here :yay: Here are my latest Lego stuff, the Thomas Henry vco 555, his vc crossfader/vca and some pedals converted... IMG_20210106_231250.jpg Cool, the first LEGO Synth I've seen yet :eek: But LEGO is nice, here my inductor winding machine with counter for my Moog (tm) 907 and 914 clone...
by Jarno
Tue Jan 05, 2021 1:30 pm
Forum: Music Tech DIY
Topic: Harry Bissell's Fast Response Low Ripple Envelope Follower
Replies: 247
Views: 32288

Re: Harry Bissell's Fast Response Low Ripple Envelope Follower

Phatline, please take this as constructive criticism, because that's how it is meant. Even though you might not want to sound stubborn and unfriendly, you do a bit. It might very well be a cultural thing, given that you are not a English native speaker, but still. Try to tone it down, and you'll fin...
by Jarno
Tue Jan 05, 2021 8:33 am
Forum: Music Tech DIY
Topic: Harry Bissell's Fast Response Low Ripple Envelope Follower
Replies: 247
Views: 32288

Re: Harry Bissell's Fast Response Low Ripple Envelope Follower

Thanks, that 'd be me, I suppose.
It did sound a bit too commercial, hence my reply.

Still, an interesting circuit.
by Jarno
Tue Jan 05, 2021 8:27 am
Forum: Music Tech DIY
Topic: Harry Bissell's Fast Response Low Ripple Envelope Follower
Replies: 247
Views: 32288

Re: Harry Bissell's Fast Response Low Ripple Envelope Follower

Harry Bissells circuit is an idea, not a finished product, so your "start production" actually isn't. It is a step towards a final product, prototyping. Get boards made, build them, see if they work, if they do not, hack and tinker until they do, order second round of prototypes. Build again, if the...
by Jarno
Mon Jan 04, 2021 5:01 pm
Forum: Music Tech DIY
Topic: Harry Bissell's Fast Response Low Ripple Envelope Follower
Replies: 247
Views: 32288

Re: Harry Bissell's Fast Response Low Ripple Envelope Follower

Yes, should have phrased that differently, it does work, but does not have benefits wrt simpler circuits. Maybe a much faster clock and smaller caps? Should the clock speed and cap value be balanced? To have the cap as small as possible, this way it can charge quickly? Parasitic inductance could cau...
by Jarno
Mon Jan 04, 2021 4:41 pm
Forum: Music Tech DIY
Topic: Harry Bissell's Fast Response Low Ripple Envelope Follower
Replies: 247
Views: 32288

Re: Harry Bissell's Fast Response Low Ripple Envelope Follower

Interesting, so basically, the conclusion is, it does not work?
Had high hopes for this "sampling" envelope follower.
by Jarno
Wed Dec 16, 2020 3:02 pm
Forum: Music Tech DIY
Topic: Through-hole component storage lifespan
Replies: 7
Views: 381

Re: Through-hole component storage lifespan

Another option would be to use sockets for IC's... easy swap in and out for troubleshooting, replacement, etc... Sockets fail more readily than current overmoulded IC's, so you will basically add a failure mode to your build. If an IC fails, which is not in a socket, simply cut the legs, pull them ...
by Jarno
Wed Dec 16, 2020 1:06 pm
Forum: Music Tech DIY
Topic: Pitch to voltage converter
Replies: 4
Views: 330

Re: Pitch to voltage converter

Interesting!
On my list of things to try one day are the specialised Burr Brown frequency to voltage IC's, as some of them are pretty accurate, but using a microcontroller is a lot more flexible, great idea!

How does it work? Have you used it in a musical context?
by Jarno
Sat Dec 05, 2020 6:45 pm
Forum: Music Tech DIY
Topic: In search for a portable amp for a 800Ω/1600Ω speaker
Replies: 14
Views: 323

Re: In search for a portable amp for a 800Ω/1600Ω speaker

You might clip the amp if you turn it up in search for loudness, a bigger amp is safer for the loudspeaker.
by Jarno
Sat Dec 05, 2020 2:13 pm
Forum: Music Tech DIY
Topic: In search for a portable amp for a 800Ω/1600Ω speaker
Replies: 14
Views: 323

Re: In search for a portable amp for a 800Ω/1600Ω speaker

Which means that you can clip the amp and damage the speaker by feeding it DC
by Jarno
Thu Dec 03, 2020 7:00 am
Forum: Music Tech DIY
Topic: Info on Euroack physical standards
Replies: 20
Views: 689

Re: Info on Euroack physical standards

I do not agree that there is no standard, there is the aforementioned DIN norm which specifies panel dimensions and pitch of holes. Also in that spec is the backplane which we obviously do deviate from. With respect to power it's 2x5 or 2x8 position 0.1"header, and IDC bandcables. Horizontal pitch i...
by Jarno
Mon Nov 30, 2020 8:03 am
Forum: Music Tech DIY
Topic: Looking for DIY SMD projects
Replies: 11
Views: 318

Re: Looking for DIY SMD projects

Thomas Henry VCO, a dual, just has triangle outputs. I wanted a "building block" VCO to do something FM like (also made a dual VCA on a small PC, mostly in SMT). Ultimately, I just built a few of them and use them as "regular" VCO's. Haven't tried calibrating them yet, but I have noticed in my layou...
by Jarno
Mon Nov 30, 2020 6:01 am
Forum: Music Tech DIY
Topic: Looking for DIY SMD projects
Replies: 11
Views: 318

Re: Looking for DIY SMD projects

In the recent boards that I did, I use SMD, since I think it is just as quick as through hole (manual soldering, automation is obviously a LOT quicker with SMT :D ).
Not sure what boards I still have, it is simple stuff, compared to MI, some VCO's, filters etc, let me know if you are interested.
by Jarno
Mon Nov 30, 2020 5:58 am
Forum: Music Tech DIY
Topic: Kassutronics VC Slope
Replies: 23
Views: 945

Re: Kassutronics VC Slope

Thanks for the suggestions, currently stuffing two of these, TLC3702 is proving to be somewhat harder to find (looks like either Mouser and put in a bigger order for other things as well, or eBay). I stuff most boards with 0207 sized resistors, but I do have some smaller ones which I sometimes use. ...
by Jarno
Mon Nov 30, 2020 5:47 am
Forum: Music Tech DIY
Topic: An Introduction
Replies: 36
Views: 1358

Re: An Introduction

Fantastic to have you here! You have done so much with respect to publishing of interesting articles and schematics, "a synthesizer for the 21st century" is definitely a classic, thank you!
by Jarno
Wed Nov 25, 2020 7:41 am
Forum: Music Tech DIY
Topic: Why is it fun to BUILD modular synthesizers?
Replies: 25
Views: 710

Re: Why is it fun to BUILD modular synthesizers?

I did the same with guitars first - played them, then wanted to play one I had made so made an acoustic, then an electric and wanted to play it through stompboxes I had made nd through a home-made valve amp and speaker cab. Modular synths seemed like a natural step.... Guitar pedal DIY was a gatewa...
by Jarno
Wed Oct 21, 2020 4:52 am
Forum: Music Tech DIY
Topic: Phaser Design
Replies: 19
Views: 598

Re: Phaser Design

To the thread starter, Frequencycentral here has a ton of experience on phaser design.
by Jarno
Mon Oct 19, 2020 7:28 am
Forum: Music Tech DIY
Topic: Solution to clogged hole with solder
Replies: 24
Views: 610

Re: Solution to clogged hole with solder

+1 Toothpick works really well, you can get them in very thin variants. Mine have a menthol smell, which is a bit weird when soldering :)
by Jarno
Fri Oct 16, 2020 3:39 am
Forum: Music Tech DIY
Topic: The 2020 Show Us Your DIY Builds Thread!
Replies: 532
Views: 47566

Re: The 2020 Show Us Your DIY Builds Thread!

Looks pretty good, it'll be plenty robust as long as it sits under a thick layer of lacquer.
by Jarno
Thu Oct 15, 2020 12:39 pm
Forum: Music Tech DIY
Topic: The 2020 Show Us Your DIY Builds Thread!
Replies: 532
Views: 47566

Re: The 2020 Show Us Your DIY Builds Thread!

I've slowly been building up my synth since February. I learned how to use KiCad and made a PSU and some busboards. I then built a case and started getting into building up modules,just sourcing PCBSs. I'm trying to do everything by hand - cutting panels, drilling holes, designing graphics etc. Her...
by Jarno
Wed Oct 14, 2020 6:56 am
Forum: Music Tech DIY
Topic: Coolaudio 3046 transistor array clone
Replies: 23
Views: 929

Re: Coolaudio 3046 transistor array clone

National's LM3045,46,86 Transistor Array. Even though some specs are different -parts were binned as '46 or 86' by testing- So they do have different bins for this part, wasn't aware of that, thanks. edit: Seems the 3045 has the "wide temperature range" packaging, so that is not a different die, pr...
by Jarno
Tue Oct 13, 2020 3:59 am
Forum: Music Tech DIY
Topic: Coolaudio 3046 transistor array clone
Replies: 23
Views: 929

Re: Coolaudio 3046 transistor array clone

The RCA 3046 is still fairly common on the surplus grey market. I'm sure someone will say they're surplus because they're out of spec but generally I've found that not to be the case with other devices I've obtained that way. Probably not out of spec, because they wouldn't have packaged them if the...

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