3181
Cartoons in Tektronix Schematics
Explore Tektronix schematic cartoons with vintageTEK. Discover hidden humorous drawings in manuals and schematics from classic Tektronix gear.
New
The latest blog posts to take off on Hacker News. 4,807 posts.
Hardware & Electronics
Any year
3182
A Raspberry Pi-powered live train station sign
Build your own UK train station platform departure display (next train indicator) with live data using a Raspberry Pi Zero and balena.
3183
Ray tracing with uLisp
This is a simple ray tracer written in uLisp, using the uLisp graphics extensions to plot on a colour TFT display. The scene contains five spheres and a plane and can be run on any of the following boards that include an integral TFT display:
3184
LoRaWAN distance world record broken twice: 766km using 25mW power
After almost 2 years, the world record of 702 km (436 miles) has been broken. Not once but twice. For a long time this record which was set on 26th of August 20
3185
Librem 5 Smartphone Final Specs
Purism makes premium phones, laptops, mini PCs and servers running free software on PureOS. Purism products respect people's privacy and freedom while protecting their security.
3186
Raspberry Pi Model Railway Automation
This note introduces my experiences of using the Raspberry Pi to automate a model railway.
3187
3188
Raspberry Pi microSD follow-up, SD Association fools me twice?
/ Fool me once, shame on you. Fool me twice, \ \ prepare to die. (Klingon Proverb) / -------------------------------------------- \ ^__^ \ (oo)\_______ (__)\ )\/\ ||----w | || || (Excerpt from Ansible for DevOps, chapter 12.) The fallout from this year's microSD card performance comparison has turned into quite a…
3189
Retro 5″ Black and White TV as a computer monitor – A tale of pointlessness
The convoluted and ultimately pointless tale of how I connected a retro 80s 5" BW TV to my PC as a 3rd monitor
3190
A2-class microSD cards offer no better performance for the Raspberry Pi
Update: See follow-up post about A1 vs A2 performance, Raspberry Pi microSD follow-up, SD Association fools me twice?. After I published my 2019 Raspberry Pi microSD card performance comparison, I received a lot of feedback about newer 'A2' Application Performance class microSD cards, and how they could produce even…
3191
How Computers Boot Up (2008)
The previous post described [motherboards and the memory map] memory-map in Intel computers to set the scene for the initial phases of boot. Booting is an involved, hacky, multi-stage affair - fun st
3192
Adventures Building a Self-Driving RC Car
Having read some amazing books on Machine Learning, I had been looking for opportunities to apply ML from first principles in the real world. That was what got me curious about the wonderful Donkey Car project. The project is essentially a how-to guide to building your own RC car which can drive itself around a track…
3193
Powering a Mainframe
The last few days have been eventful. I was contacted by the datacenter that the mainframe's cage is now ready for moving in, and the power ...
3194
The Raspberry Pi 4 needs a fan
December 2020 Update: Lo and behold, the Pi Foundation tacitly acknowledges the Pi needs a fan in the official case, because now they sell the Case Fan! The Raspberry Pi Foundation's Pi 4 announcement blog post touted the Pi 4 as providing "PC-like level of performance for most users". The Foundation even offers a…
3195
How many kinds of USB-C to USB-C cables are there?
tl;dr: There are 6, it's unfortunately very confusing to the end user. Classic USB from the 1.1, 2.0, to 3.0 generations using USB-A and...
3196
Artificial “muscles” achieve powerful pulling force
MIT researchers have created a fiber-based, lightweight, fast-acting artificial muscle that could be useful for robotics and for prosthetics.
3197
QCSuper: A tool for capturing 2G/3G/4G air traffic on Qualcomm-based phones
QCSuper, an open-source tool, helps capture mobile network frames from Qualcomm-based Android devices, enabling analysis in Wireshark and more.
3198
Playing with a Raspberry Pi 4 64-bit
Lightweight virtualization is a natural fit for low power devices and, so, seeing that the extremely popular Raspberry Pi line got an upgrade, we were very keen on trying the newly released Raspberry Pi 4 model B. Getting the board up and running with a 64bit kernel (and a 64bit userland) proved to be kind of a…
3199
3200
Raspberry Pi microSD card performance comparison
Note: I also posted a separate review of some A2 'Application Performance' class cards, see this post: A2-class microSD cards offer no better performance for the Raspberry Pi. As a part-time tinkerer and full-time developer, I have been fascinated by single board computers (SBCs) since the first Raspberry Pi was…
3201
Rust, a Raspberry Pi and Addressable LEDs
Tom Arrell's blog. Tom is a Software Engineer who writes about programming, embedded and electrical projects, and life.
3202
PCI Express on the Raspberry Pi 4
After the daily dose of Hackaday - and with an idea that seemed very doable, and actually, with some improvements can be easily reproducible.
3203
California Earthquakes Disrupted HF Propagation on West Coast
The American Radio Relay League (ARRL) is the national association for amateur radio, connecting hams around the U.S. with news, information and resources.
3204
Bitcoin mining on an Apollo Guidance Computer
We've been restoring an Apollo Guidance Computer 1 . Now that we have the world's only working AGC, I decided to write some code for it. Try...
3205
Running an eInk Display with Elixir, Scenic and Nerves
So I've been curious about what kinds of displays you can connect to the Pi-series single board computers for a while. I happened to accidentally order a few. Among others an eInk display. I ordered the PaPiRus ePaper. It ended up being dead on arrival and then out of stock so I received an Inky to replace it. Fair…
3206
Breaking max efficiency of solar cells by activating 2 electrons with 1 photon
Researchers at MIT and Princeton have found a way to increase the output of silicon solar cells by allowing a single photon to release two electrons in the silicon.
3207
How to design a proper USB-C™ power sink (hint, not the way Raspberry Pi 4 did it)
This issue came up recently for a high profile new gadget that has made the transition from Micro-USB to USB-C in its latest version, the…
3208
Raspberry Pi 4 not working with some chargers
The blog of Tyler Ward (aka scorpia)2019401 points300 commentscited by 3Hardware & Electronics details
The new pi has been released and it has a USB Type-C connector for power however people are finding some chargers are not working with it (notably macbook chargers). Some have speculated that this is due to a manufacturer limitation on the power supplies however it is actually due to the incorrect detection circuitry…
3209
Software woven into wire: Core rope and the Apollo Guidance Computer
Onboard the Apollo spacecraft, the revolutionary Apollo Guidance Computer helped navigate to the Moon and land on its surface. One of the f...
3210
Hacking Digital Calipers
A collaborative AI workspace, built on your company context. Build and orchestrate agents right alongside your team's projects, meetings, and connected apps.