Author: Arya Voronova

517 Articles

Building Rust Apps For Cheap Hackable Handheld Console

December 11, 2025 by 26 Comments

The age of cheap and powerful devices is upon us. How about a 20 EUR handheld game console intended for retro game emulation, that runs Linux under the hood? [Luiz Ferreira] kicks the tires of a R36S, a very popular and often cloned device running a quad-core RK3326 with an Ubuntu-based OS, and shows us how to write and cross-compile a simple app for it using Rust – even if you daily drive Windows.

Since a fair bit of the underlying Linux OS is exposed, you can quickly build even text applications and have them run on the console. For instance, [Luiz]’s app uses ratatui to scan then print button and joystick states to the screen. Perhaps the most important thing about this app is that it’s a detailed tutorial on cross-compiling Rust apps for a Linux target, and it runs wonders using WSL, too.

Installing your app is simple, too: SSH into it, username ark and password ark. Looking for a Linux-powered device with a bright screen, WiFi, a fair few rugged buttons, and an OS open for exploration? This one is quite reassuring in the age of usual portables like smartphones getting more and more closed-off to tinkering. And, if the store-bought hackable Linux consoles still aren’t enough, you can always step it up and build your own, reusing Joycons for your input needs while at it.

Production KiCad Template Covers All Your Bases

December 10, 2025 by 9 Comments

Ever think about all the moving parts involving a big KiCad project going into production? You need to provide manufacturer documentation, assembly instructions and renders for them to reference, every output file they could want, and all of it has to always stay up to date. [Vincent Nguyen] has a software pipeline to create all the files and documentation you could ever want upon release – with an extensive installation and usage guide, helping you turn your KiCad projects truly production-grade.

This KiBot-based project template has no shortage of features. It generates assembly documents with custom processing for a number of production scenarios like DNPs, stackup and drill tables, fab notes, it adds features like table of contents and 3D renders into KiCad-produced documents as compared to KiCad’s spartan defaults, and it autogenerates all the outputs you could want – from Gerbers, .step and BOM files, to ERC/DRC reports and visual diffs.

This pipeline is Github-tailored, but it can also be run locally, and it works wonderfully for those moments when you need to release a PCB into the wild, while making sure that the least amount of things possible can go wrong during production. With all the features, it might take a bit to get used to. Don’t need fully-featured, just some GitHub page images? Use this simple plugin to auto-add render images in your KiCad repositories, then.

Continue reading “Production KiCad Template Covers All Your Bases” →

Cheap 10x10cm Hotplate Punches Above Its Weight

December 10, 2025 by 14 Comments

For less than $30 USD, you can get a 10×10 centimeter hotplate with 350 Watts of power. Sounds mighty fine to us, so surely there must be a catch? Maybe not, as [Stefan Nikolaj]’s review of this AliExpress hotplate details, it seems to be just fine enough.

At this price, you’d expect some shoddy electronics inside, or maybe outright fiery design decisions, in the vein of other reviews for similar cheap heat-producing tech that we’ve seen over the years. Nope – the control circuitry seems to be more than well-built for our standards, with isolation and separation where it matters, the input being fused away, and the chassis firmly earthed. [Stefan] highlights just two possible problem areas: a wire nut that could potentially be dodgy, and lack of a thermal fuse. Both can be remedied easily enough after you get one of these, and for the price, it’s a no-brainer. Apart from the review, there’s also general usage recommendations from [Stefan] in the end of the blog post.

While we’re happy to see folks designing their own PCB hotplates or modifying old waffle irons, the availability of cheap turn-key options like this means there’s less of a reason to go the DIY route. Now, if you’re in the market for even more build volume, you can get one of the classic reflow ovens, and maybe do a controller upgrade while you’re at it.

Putting KDE On Raspberry Pi OS Simpler Than Expected

December 9, 2025 by 31 Comments

Raspberry Pi boards are no longer constrained – these days, you can get a quad-core board with 8 or 16GB of RAM to go around, equip it with a heatsink, and get a decently comfortable shop/desk/kitchen computer with GPIOs, cameras, speedy networking, maybe even NVMe, and all the wireless you’d expect.

Raspberry OS, however, remains lightweight with its pre-installed LXDE environment – and, in many cases, it feels quite constrained. In case you ever idly wondered about giving your speedy Pi a better UI, [Luc] wants to remind you that setting up KDE on your Raspberry OS install is dead simple and requires only about a dozen commandline steps.

[Luc] walks you through these dozen steps, from installation to switching the default DE, and the few hangups you might expect after the switch; if you want to free up some disk space afterwards, [Luc] shows how to get rid of the original LXDE packages. Got the latest Trixie-based Pi OS? There’s an update post detailing the few necessary changes, as well as talking about others’ experiences with the switch.

All in all, [Luc] demonstrates that KDE will have a fair bit of graphical and UX advantages, while operating only a little slower, and if you weren’t really using your powerful Pi to the fullest, it’s a worthwhile visual and usability upgrade. For the regular desktop users, KDE has recently released their own distro, and our own [Jenny] has taken a look at it.

Super Simple Deadbuggable Bluetooth Chip

December 9, 2025 by 21 Comments

We’re all used to Bluetooth chips coming in QFN and BGA formats, at a minimum of 30-40 pins, sometimes even a hundred. What about ten pins, with 1.27 mm pitch? [deqing] from Hackaday.io shows us a chip from WCH, CH571K, in what’s essentially a SO-10 package (ESSOP10). This chip has a RISC-V core, requires only three components to run, and can work Bluetooth through a simple wire antenna.

This chip is a RISC-V MCU with a Bluetooth peripheral built in, and comes from the CH57x family of WCH chips that resemble the nRF series we’re all used to. You get a fair few peripherals: UART, SPI, and ADC, and of course, Bluetooth 4 with Low Energy support to communicate with a smart device of your choice. For extra hacker cred, [deqing] deadbugs it, gluing all components and a 2.54 mm header for FTDI comms onto the chip, and shows us a demo using webBluetooth to toggle an LED through a button in the browser.

You need not be afraid of SDKs with this one. There’s Arduino IDE support (currently done through a fork of arduino_core_ch32) and a fair few external tools, including at least two programming tools, one official and one third-party. The chip is under a dollar on LCSC, even less if you buy multiple, so it’s worth throwing a few into your shopping cart. What could you do with it once received? Well, you could retrofit your smoke alarms with Bluetooth, create your own tire pressure monitors, or just build a smartphone-connected business card!

PCB Design Review: TinySparrow, A Module For CAN Hacking, V2

December 9, 2025 by 13 Comments

A year ago, I’ve design reviewed an MCU module for CAN hacking, called TinySparrow. Modules are plenty cool, and even more so when they’re intended for remaking car ECUs. For a while now, every car has heavily depended on a computer to control the operation of everything inside it – the engine and its infrastructure, the lights, and  Sadly, ECUs are quite non-hackable, so building your own ECUs only makes sense – which is why it’s heartwarming to see modules intended to make this easier on the budding ECU designer!

Last time we saw this module, it was quite a bit simpler. We talked about fixing a number of things – the linear regulator, the unprotected CAN transceiver, and the pinout; we also made the board cheaper to produce by reducing the layer count and instead pushing the clearance/track width limits. This time, we’re seeing TinySparrow v2 , redesigned accounting for the feedback and upgraded with a new MCU – it’s quite a bit more powerful!

For a start, it’s got ESD diodes, a switching-linear regulator chain for clean but efficient power supply, and most importantly, an upgraded MCU, now with USB and one more CAN channel for a total of two! There’s a lot more GPIOs to go around, too, so the PCB now uses all four of its sides for breakout out power, programming, and GPIO pads. Only a tiny bit bigger than its v1, this module packs a fair bit of punch.

Let’s revisit the design, and try to find anything still left to improve – there’s a few noteworthy things I found.

Continue reading “PCB Design Review: TinySparrow, A Module For CAN Hacking, V2” →

RP2350 Done Framework Style

December 8, 2025 by 24 Comments

Ever want a microcontroller addon for your laptops? You could do worse than match one of the new and powerful microcontrollers on the block to one of the most addon-friendly laptops, in the way the Framework RP2350 laptop card does it. Plug it in, and you get a heap of USB-connected IO coming out of the side of your laptop – what’s not to love?

The card utilizes the Framework module board space to the fullest extent possible, leaving IO expansion on SMD pads you could marry to a male or female header, your choice. With about seventeen GPIOs, power, and ground, there’s really no limit on what you could add to the side connector – maybe it’d be a logic analyzer buffer, or a breadboard cable, or a flash chip reader, maybe, even an addon to turn it into a pirate version of a Bus Pirate? There’s a fair few RP2350 peripherals available on the side header GPIOs, so sky’s the limit.

Naturally, the card is fully open-source, and even has two versions with two different USB-C plug connectors, we guess, depending on which one is better liked by your PCBA process. Want one? Just send off the files! Last time we saw an addon adding GPIOs to your laptop, it was a Pi Zero put into the optical bay of a Thinkpad, also with an expansion header available on the side – pairing yet another legendary board with a legendary laptop.