Author: Arya Voronova

498 Articles

Share Your Projects: Imperfectionism

November 6, 2025 by 37 Comments

Everyone has a standard for publishing projects, and they can get pretty controversial. We see a lot of people complain about hacks embedded in YouTube videos, social media threads, Discord servers, Facebook posts, IRC channels, different degrees of open-sourcing, licenses, searchability, and monetization. I personally have my own share of frustrations with a number of these factors.

It’s common to believe that hacking as a culture doesn’t thrive until a certain set of conditions is met, and everyone has their own set of conditions in mind. My own dealbreaker, as you might’ve seen, is open-sourcing of code and hardware alike – I think that’s a sufficiently large barrier for hacking being repeatable, and repeatability is a big part of how hacking culture spreads.

This kind of belief is often self-limiting. Many people believe that their code or PCB source file is not a good contribution to hacking culture unless it meets a certain cleanliness or completeness standard. This is understandable, and I do that, too.

Today, I’d like to argue against my own view, and show how imperfect publishing helps build hacking culture despite its imperfections. Let’s talk about open-source in context of 3D printing.

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Lithium-Ion Batteries: WHY They Demand Respect

November 4, 2025 by 65 Comments

This summer, we saw the WHY (What Hackers Yearn) event happen in Netherlands, of course, with a badge to match. Many badges these days embrace the QWERTY computer aesthetic, which I’m personally genuinely happy about. This one used 18650 batteries for power, in a dual parallel cell configuration… Oh snap, that’s my favourite LiIon cell in my favourite configuration, too! Surely, nothing bad could happen?

Whoops. That one almost caught me by surprise, I have to shamefully admit. I just genuinely love 18650 cells, in all glory they bring to hardware hacking, and my excitement must’ve blindsided me. They’re the closest possible entity to a “LiIon battery module”, surprisingly easy to find in most corners of this planet, cheap to acquire in large quantities, easy to interface to your projects, and packing a huge amount of power. It’s a perfect cell for many applications I and many other hackers hold dear.

Sadly, the 18650 cells were a bad choice for the WHY badge, for multiple reasons at once. If you’re considering building a 18650-based project, or even a product, let me show you what exactly made these cells a bad fit, and how you might be able to work around those limitations on your own journey. There’s plenty of technical factors, but I will tell you about the social factors, because these create the real dealbreaker here. Continue reading “Lithium-Ion Batteries: WHY They Demand Respect” →

Screenshot of the email received: Hi there, Upon a thorough review by our Risk Control Team, we are sorry to inform you that, your account access will be permanently disabled on December 13th, 2025 due to compliance policy requirements. Before this date, you may: 1) Complete any existing orders. 2) Pickup components from your parts inventory. 3) Withdraw your remaining account balance (JLC Balance) 4) Back up your historical Gerber Files or any other information. Please note that after December 13th, 2025, your account will be permanently locked and cannot be reopened. Best Regards, The JLCPCB Risk Control Team

JLCPCB Locking Accounts, Mentions “Risky IP Addresses, Activities”

October 19, 2025 by 73 Comments

In the past week, a few forum and Reddit threads have popped up, with people stating that JLCPCB has emailed them with a notice, saying their accounts are set up for terminations after an assessment by JLCPCB’s “Risk Control Team”. Reasons given are vague, the terminations are non-appealable, and if you’re planning a JLCPCB order sometime soon, it can certainly come as a surprise. From the looks of it, the accounts restricted do not appear to be tied to any specific country – and not even from the same “kind” of countries.

As quite a few people have observed, the JLCPCB reasoning resembles a compliance action way more than it resembles any sort of internal policy. A few days ago, JLCPCB has released a statement on their blog, claiming that a “history of risky IP addresses and risky activities” would be grounds for a termination, and mentioning “compliance” in ways that would hint at external legal pressures.

By now, quickly checking around Reddit and some other places, we’ve counted at least ten people affected so far – most of them have received emails about account closures, but at least one person has reported a denial when attempting to place an order, instead of getting an email ahead of time. The latter hints that there’s a number of people not yet notified about their account getting terminated, and the amount of people actually affected might very well be a fair bit larger than we can see.

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FreeCAD Foray: Good Practices

September 11, 2025 by 26 Comments

Last time, we built a case for a PCB that handles 100 W of USB-C power, an old project that I’ve long been aiming to revive. It went well, and I’d like to believe you that the article will give you a much-needed easy-to-grasp FreeCAD introduction, Matrix knowledge upload style, having you designing stuff in no time.

Apart from my firm belief in the power of open-source software, I also do believe in social responsibilities, and I think I have a responsibility to teach you some decent FreeCAD design practices I’ve learned along the way. Some of them are going to protect your behind from mistakes, and some of them will do that while also making your project way easier to work with, for you and others.

You might not think the last part about “others” matters, but for a start, it matters in the ideal world that we’re collectively striving towards, and also, let’s be real, things like documentation are half intended for external contributors, half for you a year later. So, here’s the first FreeCAD tip that will unquestionably protect you while helping whoever else might work with the model later.

Okay, we’re all hackers, so I’ll start with zero-th FreeCAD tip – press Ctrl+S often. That’ll help a ton. Thankfully, FreeCAD’s autorecovery system has made big leaps, and it’s pretty great in case FreeCAD does crash, but the less you have to recover, the better. Now, onto the first tip.

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FreeCAD Foray: From Brick To Shell

September 9, 2025 by 18 Comments

Over a year ago, we took a look at importing a .step file of a KiCad PCB into FreeCAD, then placing a sketch and extruding it. It was a small step, but I know it’s enough for most of you all, and that brings me joy. Today, we continue building a case for that PCB – the delay is because I stopped my USB-C work for a fair bit, and lost interest in the case accordingly, but I’m reviving it now.

Since then, FreeCAD has seen its v 1.0 release come to fruition, in particular getting a fair bit of work done to alleviate one of major problems for CAD packages, the “topological naming problem”; we will talk about it later on. The good news is, none of my tutorial appears to have been invalidated by version 1.0 changes. Another good news: since version 1.0, FreeCAD has definitely become a fair bit more stable, and that’s not even including some much-needed major features.

High time to pick the work back up, then! Let’s take a look at what’s in store for today: finishing the case in just a few more extrusions, explaining a few FreeCAD failure modes you might encounter, and giving some advice on how to make FreeCAD for you with minimum effort from your side.

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GPS And Its Little Modules

September 8, 2025 by 17 Comments

Ever want to find your device on the map? Think we all do sometimes. The technology you’ll generally use for that is called Global Positioning System (GPS) – listening to a flock of satellites flying in the orbit, and comparing their chirps to triangulate your position.

The GPS system, built by the United States, was the first to achieve this kind of feat. Since then, new flocks have appeared in the orbit, like the Galileo system from the European Union, GLONASS from Russia, and BeiDou from China. People refer to the concept of global positioning systems and any generic implementation as Global Navigation Satellite System (GNSS), but I’ll call it GPS for the purposes of this article, and most if not all advice here will apply no matter which one you end up relying on. After all, modern GPS modules overwhelmingly support most if not all of these systems!

We’ve had our writers like [Lewin Day] talk in-depth about GPS on our pages before, and we’ve featured a fair few projects showing and shining light on the technology. I’d like to put my own spin on it, and give you a very hands-on introduction to the main way your projects interface with GPS.

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Design Review: LattePanda Mu NAS Carrier

August 12, 2025 by 17 Comments

It is a good day for design review! Today’s board is the MuBook, a Lattepanda Mu SoM (System-on-Module) carrier from [LtBrain], optimized for a NAS with 4 SATA and 2 NVMe ports. It is cheap to manufacture and put together, the changes are non-extensive but do make the board easier to assemble, and, it results in a decent footprint x86 NAS board you can even order assembled at somewhere like JLCPCB.

This board is based on the Lite Carrier KiCad project that the LattePanda team open-sourced to promote their Mu boards. I enjoy seeing people start their project from a known-working open-source design – they can save themselves lots of work, avoid reinventing the wheel and whole categories of mistakes, and they can learn a bunch of design techniques/tips through osmosis, too. This is a large part of why I argue everyone should open-source their projects to the highest extent possible, and why I try my best to open-source all the PCBs I design.

Let’s get into it! The board’s on GitHub as linked, already containing the latest changes.

Git’ting Better

I found the very first review item when downloading the repo onto my computer. It took a surprising amount of time, which led me to believe the repo contains a fair bit of binary files – something quite counterproductive to keep in Git. My first guess was that the repo had no .gitignore for KiCad, and indeed – it had the backups/ directory with a heap of hefty .zips, as well as a fair bit of stuff like gerbers and footprint/symbol cache files. I checked in with [LtBrain] that these won’t be an issue to delete, and then added a .gitignore from the Blepis project.

Continue reading “Design Review: LattePanda Mu NAS Carrier” →