Acid Solder Club

Acid Solder Club ACID SOLDER CLUB is a DIY Electronics Workspace in Utrecht (NL) with events, workshops and meetups!

mailinglist: https://mailchi.mp/ecb0b914ea08/acid-solder-club-1?fbclid=IwAR256Xct466fmKnOvVrfTEF25BiH7Op5c6r68fymOilUQP9rGegU2wTd1Ks Acid Solder Club was founded by electronics and soldering freak Veerle Pennock in 2019 in Utrecht, The Netherlands. It started with an idea and wish for creating a new type of maker space with more focus on DIY electronics, hardware hacking, sensors and interaction,

electronic instruments and interface design, and of course most important: soldering! Acid Solder Club’s aim is to be a communal playground, where through various meetups and workshops, knowledge and skills regarding soldering, (DIY) electronics and much more can be shared amongst the community. From hermit hobbyists, young and old, beginner and advanced, artists and musicians looking for a new technological skills to conquer and master! Acid Solder Club is a place where we try to work on a peer-to-peer learning environment and support system together, where there is not one teacher just ‘sending signals’ outwards, but to build a strong community system where we can learn from each other.

It’s time for making the TAPE LOOP SUPER STATION in the Acid Solder Club studio! ⚡️the sun’s out and spring cleaning’s i...
26/02/2026

It’s time for making the TAPE LOOP SUPER STATION in the Acid Solder Club studio! ⚡️the sun’s out and spring cleaning’s in the air. Workspace neighbour and tape superstar was cleaning out his studio last week and some new tape decks were donated to the shop for repairs and the supertape corner. ❤️

I’m doing some repairs on a few units today, while figuring out the layout of the reel to reel tape corner and these machines in general. 🌀🌀it’s close to the community modular system and Steim Zwarte Dozen 5U modular for some live recording and overdubbing! Also including a mixer for routing external signals!

The workspace is in full swing! Tonight’s another full Acid Solder Session and new dates coming up!

01/02/2026

Why not to design at 3Am while on synth diy zoomies.. 🐈‍⬛⚡️ill take a closer look at this monster of pcb fix that became quite the untertaking! Grrrrr!

This was my first take on a clock divider and sequencer control center for circuit bend toys and hardware hacked machines somewhere 2024, made it didnt work and has been looking at me for ages to workout what I messed up (spoiler. A lot!)

Ohhhhh jup started at 3am or so, just kept adding things to what was a simple schematic: 2 build in LfO’s why not?! Ah maybe an option for external trigger sync and buildin 40106 schmittie trigger. Cv and gate out but WHY not add another patchbay for maybe future lols!? And vactrols and doodles and jaj. Early morning it is.

Send it to the manufacturer no idea whats gonna happen ground planes unconnected, wrong chips ordered (40174 instead of 4017 but im getting glasses soon;) oh why would one want to connect the +8 V from the regulator to the chips, would be handy… sure! 🥸

I dont know hope this story prevents you from making makin my idiot mistakes, but honestly will probably do this again and it’s the way it goes sometimes😂 let this be a start of a new series which is “Fixing inventions Veerle build that failed” or something, but with more why and how it got fixed.

Lifes trial and error.

Now it works and its a mess everywhere.

Again.

Bye!

31/01/2026

The warm sound of tube oscillators with the Philips Philicorda AG7500, and the AG7600 amp bring a whole new oempf to the studio. 💥

The slowly warmup phase of the tubes, is just fascinating to watch over and over again, and what an amount of work to make and maintain these units while time nibbels away on it’s components.

I dont think tubes will ever dissapear, in a world where new tech innovations follow eachoter close after another, the uniqueness of Tube amps, synths and other devices is something we will cherish for a long time… ❤️

30/01/2026

This tube based Philips EL3581 recorder is over 60 years old, and still servicable! ⚡️These machines were made to be serviced and working on them takes quite the deep dive understanding circuits, components and care.

Keeping them alive and kicking, also means this knowledge stays alive, and to my feeling its worth preserving so that mucisans, artist, makers and hobbyist can enjoy their designs, sounds and voices. They are unmissable in history, and working on these kind of devices a daily practice.

Whats your favourite repair job or most terrible experience of a serviced machine? Lemme know! Let’s keep this knowledge alive! 💪

24/01/2026

The custom designed and 3D printed led’s look neaaaaaat on the drumcomputer oealallaaa!🚨😍

After troublesome uninspiring searches on the big webs for this vintage look square soft light leds a few months back, me and Unze decided to custom design these in Blender, 3D print them, and with some iterations later… place some dollhouse type leds inside them and damn they look fine. If your interested in these kind of leds let me know I will consider selling them in the workshop in a pack of multiples :)

They can to be a bit brighter, there 12v leds running on 9v triggers with hi-side drivers, but we’ll look at that later :) for now, time for a bierje after this morning, day and evening of soldering! 🍺

This organ was one of 5 that were donated/horded/salvaged a while back from electronic organs that were too far broken to be fully restored. So bits and pieces are now converted into new standalone midi drummachines, keyboards and synths.

The drum pcb of this KAWAI organ was donated by studio neighbour !

24/01/2026

Saturday night project time:) working on programming KAWAI BEATS midi controlled salvaged electronic organ drumcomputer adding new interface designs. Midi option as wel as premade patterns, speed control and step lenght maybe a jungle rhythm mangler mode of some sorts. 🙌

Midi notes from keystep since I keep somehow forgetting every month for the past halfyear that I sold my beatstep pro 🤣.

Adding some leds next for drum indicators as well and frontpanel controls. See ya laterrrrrrrr! 🥁

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Vlampijpstraat 84
Utrecht
3534AR

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