The RTL-SDR Blog V4 has been a very popular product that we released back in August 2023. Back then, it was released as a 'limited edition' product because the Blog V4 relied on the Rafael R828D…

Over on YouTube, Gabe from the saveitforparts channel has uploaded a video where he tests out his Discovery Drive and Discovery Dish with L-Band feed for creating sky heatmaps of L-band satellites.…

To help on the receive end, we've just added Spectral Subtraction Noise Reduction (SSNR) to the Elecraft toolkit.

This is an update to my previous post about the G6 Turret and my first impressions. Update. My G6 Turret lasted almost exactly one year. This past Monday, it detected its last vehicle, went offline…

I've now gone through six charge/discharge cycles of my KX2's internal battery using the new KXUSBC2 to charge it and I've used different sources and USB-C cables for each charge.Regardless of the…

Documentation for the project shown at Hackaday Europe 2026 in Lecco. Link to paper pre-print: https://arxiv.org/abs/2603.18848 More info to come soon!

Every once in a while, one encounters a high-end audio product where the whole is greater than the sum of the parts. Performance that punches far above its pay grade. In the case of the Analog Relax…

In 2024 I quit my FAANG job to become an independent researcher. To do this I needed GPUs, so I built “grumbl”, a 6x 6000 Ada GPU server. This blog describes the build, some of the issues…

Prot is a fan of one-shot modifiers . I started experimenting with them using keyd , but now I've moved to using kanata based on his recommendation. I also want to experiment with home row mods so…

In Part 2 of our Guide to Prepping for ARRL Field Day 2026 (June 27-28), we’ll be examining ways to successfully operate your transmitting equipment from sources completely independent of […]…

a collection of thoughts on the landscape moon electronic musical voltage instrumentmasterful build qualitythe wood feels soft yet sturdyno rough edgesthe panel is a work of art on its owntrulyall…

Noctua is expanding its 120 mm high-end lineup with a black variant of the NF-A12x25 G2. The NF-A12x25 G2 PWM chromax.black was introduced on 12 May 2026 and is intended to combine the technical…

It's been an incredible 6 months since we first introduced the Toucan. Here's an update on what's changed, what's new, and what's coming next.

Overview The Inheco Control 96 is an OEM unit built around a Watlow Series 96 PID controller and a Watlow LSTW driver module, housed in an Inheco-branded chassis. Originally designed…

A few months ago, I noticed that the passenger side exterior porch light on our Winnebago Solis 59P camper van was starting to peel and lift away from the van body at the leading edge. Unfortunately…

Following their Business-Grade Cyber X1, all MeLE's fanless mini PCs, including the PCG02, PCG02 Pro, and the Quieter 4C, now come with a Business-Grade sticker. While the new Cyber X1 includes a…

The vibe A slower, slightly worn-down week that still found a little room for rest, tinkering, and small wins. Highlights 🥵 Last week was quite warm/hot. This whole winter/spring actually has been…

The Sonnet has always been the "standard" for Mode, the board that perfectly captures that iconic, industrial side profile we all know. But with the latest iteration, Mode didn't just rest on their…

I design and develop compact embedded systems with PCB design and firmware integration for real-world applications. I’ve worked on ESP/Arduino-based hardware, IoT monitoring systems, and multi-layer…

Will guide you to implement ESP Claw on DFRobot ESP32 P4 Dev Kit and how to use the interfaces.

Last year I said I'd probably never recommend another Bambu Lab printer again. I still use my P1S, but after Bambu Lab started pushing their always-connected cloud solution as the new default: I…

DX Engineering is a proud distributor of high-performance Italian-made Momobeam HF/6M Yagis, end-fed wire antennas and choke baluns, all of which will be available for sale at 2026 Dayton Hamvention…

Simply NUC has officially rebranded as SNUC, marking a new chapter for the company that has been a leading advocate for the 4x4-inch mini PC. Their NUC 15 Pro Fanless is also coming very…

My adventures with getting the Cisco 7942G working with Asterisk on original SCCP firmware

Silicon erratas or how my first analog ASIC is dead before arrival.

ANSWER TO THE BIT 15 MISBEHAVIOR With the card out of the machine, I checked the pins on the backplane at slot M4 to check for shorts or unusual connections of the pin B05 that drops to 0V during an…

Back in January 2025, I got OpenWrt running on a MikroTik Hex S and detailed the setup process for CenturyLink fiber. Since then a few things have changed.

Over the years I have experimented with so many different ways of getting pixels to update on the poi I make. Basically it boils down to 2 different ways. Looks almost the same, right? Let’s…

I am play­ing around with grown man toys such as mi­cro­con­trollers and LCD dis­plays and I2C de­vices and what­not and ran in­to a rather stupid is­sue: The eas­i­est for­mat to use is Adafruit's…

I’m talking to a film producer friend about a make-up prosthesis that includes small lights that need to be remote-controlled. Here’s some thoughts on practical design and safety.…

A receiver for Navtex maritime navigational and meteo warnings.

In today's episode of "dumb things to do with an AVR microcontroller": Does your server come with real wood? MCU website demo (may go down if this gets posted to HN) My victim is the AVR64DD32 which…

Most PCB design courses give you a blinking LED or a breakout board. The Smart USB Thumb Drive with KiCad course gives you something you can plug into a computer and use. This is a full design…

TESTING IN THE 1130 Since it did everything properly on the bench setup, it was time to verify that it works correctly with the IBM 1130 while inserted into the logic compartment. The newly…

In vielen Städten, z.B. in München, werden Balkonkraftwerke ziemlich gut gefördert (mit bis zu 320€ bzw. 50% der Kaufsumme. Speicher werden mitgefördert): Förderung von Stecker-Solar-Geräten…

Yesterday I visited SUPERBOOTH26 , the largest synthesizer trade show in Berlin! Well, somewhat briefly; I arrived a bit late so I really had to speedrun it. If you saw someone with an orange scarf…

When it comes to building custom audio cables, soldering gets all the glory. But a reliable, lifetime-guaranteed cable is born before the iron is even turned on. Proper cable prepping—specifically…

It's finally here! After years of anticipation and a weird workaround, the ideal solution is implemented and working. I can finally use my Palm Portable Keyboard (PPK) with my custom emulators for…

If you’ve ever ordered a prototype assembly from a PCB manufacturer, you know the drill. You upload your files, wait a day or two, then get an engineering query (EQ) email asking about…

Breath sensor made from an MPXV7002 and a silicon tube. The tube has incisions added near the breathing end to allow air to flow through while still building pressure at the sensor end. Enough…

ESP-IDF v6 dropped back in March and the GitHub releases page is already showing v6.0.1 - so I figured it was time to stop hiding in the v5.x cave and actually try it out. This is a nice gentle…

Ham College episode 139 is now available for download. Technician Exam Questions Part 26 of 26 T0A – Power circuits and hazards: hazardous voltages, fuses and circuit breakers, grounding, electrical…

Regular readers will be aware of this ‘series’ (series probably isn’t the right word) where I photograph my desk about once every six months and talk about what’s on it, current…

As mentioned previously, two years ago I bought a ZebraLight H600c Mk IV headlamp. When I was ordering the light, The Internet also suggested that I buy magnets for it. Reader, I did. From K&J…

I've just got an awesome Xteink X4 ESP32 E Ink reader and flashed the awesome CrossPoint Reader over awesome WebSerial, which took like 30 seconds in browser. Then I thought, wouldn't it be even more…

I've been playing on computers since I was four or so, and building them since around twelve or so. PC building has always been one of my favourite hobbies: something about the need to deeply…

I have a Framework Laptop 13 that has a Ryzen AI 7 350 CPU that includes an NPU. I have started playing with this NPU to understand how to develop software for it. While NPUs are mainly intended as…

for free! (with used disks and parts from a previous PC)