https://electro-music.com/forum/ https://electro-music.com/forum/viewtopic.php?p=458433#458433 Thank you very much antber2 Sat, 28 Mar 2026 14:21:40 -0700 https://electro-music.com/forum/viewtopic.php?p=458430#458430 Perhaps it's a similar issue with impedance? Is there a trace on the PCB running from the lfo to something affecting the voice perhaps? If so, maybe try cleaning it with some isopropyl? humancalledjohn Sat, 28 Mar 2026 13:08:10 -0700 https://electro-music.com/forum/viewtopic.php?p=458390#458390 I was asked to develop a simple-to-use and simple-to-include Voltage Controlled MIDI Arpeggiator .



Specs from the customer:
- No generic MIDI processor which has to be configured
- Built as module for a modular setup
- To be integratab ... analogmonster Sun, 22 Mar 2026 04:03:35 -0700 https://electro-music.com/forum/viewtopic.php?p=458366#458366 hello, i just bought a microwave 1 rev b on ebay which doesn't work :(

i think i have the same problem you once had. heres a video of it when i switch on.


https://www.youtube.com/shorts/oDnAjg5hVo4


its gotten worse now. it doesnt load ... horaciopollard2222 Thu, 19 Mar 2026 00:23:09 -0700 https://electro-music.com/forum/viewtopic.php?p=458236#458236
I decided to implement the Erica Synths FM Drum Synthesizer with some (small) extensions...

This track uses the kick drum function and two different snares / hihats.

Analogmonster · MarchToTheNew analogmonster Fri, 20 Feb 2026 02:00:16 -0700 https://electro-music.com/forum/viewtopic.php?p=458200#458200 [..]it will all go hand in hand im sure

8) I'm sure it will - there is a bit of a learning curve, and a lot to discover ..

The elements that I may need seem to all be there sofar .. be it not always in the form i'd used before .. but eh .. n ... blue hell Fri, 13 Feb 2026 10:23:01 -0700 https://electro-music.com/forum/viewtopic.php?p=458161#458161 Sorry to read about the damage.

As mentioned in the warning in the first post, I don't know enough to be able to make the output conform to proper standards.

That said, you are the first to report a problem like this. The circuit has been made i ... RingMad Sun, 08 Feb 2026 08:03:05 -0700 https://electro-music.com/forum/viewtopic.php?p=458112#458112 I don't see the center pins on the pots connected to anything. Of course, if you just use the outside pins you just have a non-variable resistor. mosc Sat, 24 Jan 2026 14:16:59 -0700 https://electro-music.com/forum/viewtopic.php?p=458100#458100 Both very good questions! I'm going to control it digitally with a microcontroller through a 16 bit DAC, so it doesn't really matter whether it's linear or expo as I can just create a lookup table.

As to why the LM3900.... good call! I just had so ... TryHard Wed, 21 Jan 2026 05:58:04 -0700 https://electro-music.com/forum/viewtopic.php?p=458073#458073 ive had to remove the 9v battery from the rails and use it to power the opamp
i need to get another 9v battery Reza Mon, 12 Jan 2026 18:26:15 -0700 https://electro-music.com/forum/viewtopic.php?p=458055#458055 Well, hi, nice! Blue hell, too!
:)
but where
Not where it was in the past :shock:

I just started thinking about this circuit, because only now (I think) I have understood it fully and think it is very cool :D
I am playing around a littl ... L´Andratté Tue, 06 Jan 2026 13:45:57 -0700 https://electro-music.com/forum/viewtopic.php?p=457956#457956 I guess all of us Lunettics have built circuits with the standard RC Schmitt trigger oscillator consisting of a resistor, capacitor, and a Schmitt trigger inverter IC (ST).
It's a beautifuly simple circuit, but has some drawbacks :

1) tuning
if ... elektrouwe Mon, 22 Dec 2025 16:08:11 -0700 https://electro-music.com/forum/viewtopic.php?p=457879#457879 Whoa, what a coincidence!

Recently I found out about this article, and just a week ago I bought the magazine this article comes from (06/83 issue of "Transistor technology") on an auction - now I'm waiting for it to arrive :roll:

What I find ... adamstan Mon, 15 Dec 2025 07:31:01 -0700 https://electro-music.com/forum/viewtopic.php?p=457851#457851 I just saw this post about Les. Updates appreciated.
His sister has not responded to my message on Facebook. It's probably in her message request section, and most people don't even know that exists.

same, no answer from her.
Last contact wi ... rosch Sat, 06 Dec 2025 23:37:07 -0700 https://electro-music.com/forum/viewtopic.php?p=457843#457843 I see that most of the discussion on the PAIA sub-forum is pretty old, but I was wondering if anyone knows about what's going on with PAIA.
Something about unexpected health issues... is the site (and PAIA) dependent on a single person? Craig Anderto ... optykmuse Wed, 03 Dec 2025 12:09:37 -0700 https://electro-music.com/forum/viewtopic.php?p=457812#457812 Hello, I already had a lot of fun with it :) Ruebezahl Wed, 19 Nov 2025 04:05:59 -0700 https://electro-music.com/forum/viewtopic.php?p=457810#457810 👍 analogmonster Tue, 18 Nov 2025 22:13:35 -0700 https://electro-music.com/forum/viewtopic.php?p=457773#457773 hageir Wed, 12 Nov 2025 15:20:06 -0700 https://electro-music.com/forum/viewtopic.php?p=457761#457761 So with a single supply, the input should be biased to center (2.5V), kept in the middle,
yes

but the feedback loop (or R9) is hooked up to ground (0V), yes? Because in a dual supply, it should be also going to the center, not (-V), that part i ... PHOBoS Thu, 06 Nov 2025 12:40:01 -0700 https://electro-music.com/forum/viewtopic.php?p=457679#457679 Hey, sorry for digging this up, but I'm more or less building the same thing right now (my schematic is ~90% the same as yours), and I was wondering: Did you ever figure out your popping problem? Also, what became of the project in general?

Also, ... der Warst Sun, 05 Oct 2025 06:36:51 -0700