Terminology varies among manufacturers, but for this post page and profile mean the same thing: a complete keymap that remains active until you select another one. A layer is an alternate mapping…

Following up on my testing of the LattePanda Mu and IOTA , this time I’m looking at the Sigma , which (as is becoming the norm with my recent pieces) I actually got before summer break. I wanted to…

Taking apart the SLZB Ultima 3 gateway to see how it runs Zigbee and Thread at once, and investigating what it really can do.

Retiring the optical drive on a Japanese GameCube in favour of a GC Loader — an SD-card ODE that replaces the drive assembly entirely.

Those of you who read my blog regularly will know that some of my posts are rather niche. I have to warn you now that this one attains a whole new level of nichey-ness. However, in my usual spirit of…

Ginza, TokyoPentax 67TTL with a Carl Zeiss Planar 80mm F2.8 C T* lensThis Pentax 67 has been customized with a Hasselblad V mount. As you can see, this means you can shoot the legendary 80mm Planar…

required listening ULTRAKILL: FRAUD by Heaven Pierce Her A few weeks ago I bought a used Linnstrument . This is the latest entry in my quest to find a synth controller with some sauce. I'm tired of…

It was meant to be. A natural evolution of local music streaming. A dedicated device for listening to music. The most popular devices for this — classic iPods — are currently very popular among…

I ran Needle 2, a 45M-parameter model for tool calling on an ESP32 S3

I have been in and out of the electronics space for most of my life. I started, like so many precocious children, with disassembling blenders, and toasters, and other things as a child, and typically…

This is part 2, read part 1 first. When I left the project last time, we connected a moisture sensor to a XIAO ESP32C3 microcontroller and wrote two Go programs: one TinyGo programs that read data…

Blog post: https://www.davidrevoy.com/article1173/gaomon-pd1161-v2-review-on-gnulinux

One of the goals of the project is not to take my TV off the wall. It's a 75" Sony, and you can see from the photo there is some space to work with: I need to find a way to mount: HDMI Splitter…

This circuit is basically a simple yet extremely accurate push button monostable timer using one half of a CD4538 dual monostable multivibrator IC. It works as a one-shot timer, where one press and…

Today I learned about the Adafruit SHARP Memory Display. Looks like an interesting bit of kit. Don’t have one yet, but maybe one day. The post Adafruit SHARP Memory Display appeared first on…

It has been a long time this has been on my todo list. I made the sw breakpoint framework a while back because i knew i would need it for that. Same for the RISCV flashstub framework. So with the…

This is a follow-up to my last blog post . I fixed it, and I don't really know how. First up, some people online suggested it ws because I didn't have an FPGA loaded. Well, no, the Hard Processor…

SUNLU FilaDC i10 tested: ten spools, twelve days of weighing and dozens of test prints show whether the heat-free desiccant cabinet really dries filament.

For the past while, Dragiša Janković and I have been working on a hardware description language (HDL). Why? you ask? We were worried about the fact that the mainstream HDLs seemed too low level (hi,…

You will probably have heard about Alpstuga on the usual nerd channels. Yay, finally an affordable(*) air quality sensor that actually works! Rush over to Ikea to get one, pry it open, try to get the…

One of the keys to the HyperHDR setup is the splitting the video source, usually HDMI, so it goes to both the display and to the USB video capture device which is plugged into a Raspberry Pi. The…

I've been running Egis XD NMEA 2000 relays on three battery banks for 5 months, and I'm very happy with the results.

No RTL-SDR dongle, no Raspberry Pi, no FPGA — just a 1.85-gram chip-scale module that listens to both ADS-B bands and hands you clean aircraft tracks over UART. Meet the ADSBee m1421. <p>The…

A three-LED string in the central control panel of the front handlebars has gone dark

Experimenting with LoRa and MeshCore I have experimented with Software Defined Radio and GNU Radio [1] before, but not that much with LoRa. LoRa is usually hidden inside a small radio module where…

ReyLight Dawn Max Ti Stonewashed Specifications Introduction Torch in use Build quality LED, bezel, lens and reflector Size and comparison User interface Batteries and charging Performance Beamshots…

I was recently working on a project involving slide potentiometers and wanted to look for a cheap source to pick up ~10 of them (only needed 5, but wanted to get some extras in case).

Upgrading Peaty’s MK2 valve stems to the new Holeshot Fast Flow Valves is easy.

Important note: please check VISUAL LOOKS GMA section for a critical detail. I was in a hurry and forgot to include the sensitive material from the work flash drive. So, you want to get a divorce?…

How to Find a Lost FPV Drone: Complete Recovery Guide Losing an FPV drone is one of those things every pilot hopes will never happen, but sooner or later it probably will. The good news is that there…

No, Pete’s not regressing to a bygone age. I happen to have a bunch of LOLIN Mini D1 ESP8266 boards lying around, abandoned when I discovered the all-singing ESP32 – and I HATE to see…

Explore the Jetson Orin Nano in 3D, with interactive parts and AR/VR on supported devices.

The upper five-LED string in the middle module failed open-circuit

In a recent Youtube video by Rick Beato he showed all computer and audio recording and playback equipment he has accumulated over the many years he worked as an audio professional. He sang the…

This is a wired 65% Hall-effect board positioned in the middle of MelGeek’s lineup. Heavily lensed backlighting Side and top rear lighting. The side lighting is not visible while typing. For my…

If you’ll listen to the latest Cup o’ Go’s episode, we were talking about TinyGo, and this happened: Shay Nehmad: 18:59 I really love the idea of, like, getting to work with Tiny Go…

The third redesign of the Vancouver SkyTrain PCB, built from real map data instead of hand-drawn artwork

Whilst working on the LoRa remote camera project a node management issue arose. The ESP32S3 has a running current in the 80mA region but its straight forward to save power by having the ESP32S3 go…

An article about experimenting with the RAMINDEX feature on Arm Cortex-A76 cores.

My keyboard is the interface to the digital world, the gateway to so much stuff that I enjoy. It is there to impose my will on my computer, to write words and form thoughts, to play video games,…

This post is an example of how to add a cover/hero image

When I last wrote in this blog last December I'd just completed Lesson 2 of FEDEVEL's "Advanced PCB Layout" course. By mid January I'd finished all the videos and then went back over several of the…

A custom controller that's a little smaller...

Because who doesn’t want to hear me constantly yelling “DO A KICKFLIP!”, this is SK8MOD, a $99 controller designed specifically for playing skateboard video games (list of…

Introduction Language models are designed in linear algebra, PyTorch functions, and translated onto hardware afterwards. You pick an architecture, then you bend CUDA, Metal, or BLAS to your will to…

Follow this wiring diagram for the HC-SR04 ultrasonic sensor: I used 1KΩ and 2KΩ resistors instead of 330Ω and 470Ω (because it's what I had on hand). Here's what that looked like: Test the wiring…

Introduction

Review: Flywoo Explorer LR4 V2 (DJI O4 Wide) – My Favourite Long-Range Micro FPV Drone Just Got Lighter! Every time I travel, I take my Flywoo Explorer with me. It’s one of my favourite micro…

Somehow, I spent 8 months of my free time designing and building a wall lamp from scratch. I didn’t have prior experience in woodworking or LED strips. Read on for how it came to be (and how it…