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...

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...

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...

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

Still, an interesting circuit.

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...

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...

Interesting, so basically, the conclusion is, it does not work?
Had high hopes for this "sampling" envelope follower.

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 ...

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?

You might clip the amp if you turn it up in search for loudness, a bigger amp is safer for the loudspeaker.

Which means that you can clip the amp and damage the speaker by feeding it DC

Page 4 for those interested:
https://elektronik.heitec.de/04-elektro ... ertise.pdf

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...

Maybe use a 100V transformer on the output of the regular amp?
https://cie-group.com/how-to-av/videos- ... line-audio

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...

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 ).
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.

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. ...

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!

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...

To the thread starter, Frequencycentral here has a ton of experience on phaser design.

+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

Looks pretty good, it'll be plenty robust as long as it sits under a thick layer of lacquer.

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...

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...

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...