In kindergarten, you learn that you should share. But for computer security, sharing is often a bad thing. The Linux kernel introduced the concept of namespaces starting with version 2.6.24. …read more (https://hackaday.com/2021/12/28/linux-fu-dont-share-well-with-others/)

DIY Infrared Calculator Printer
https://hackaday.com/2021/12/28/diy-infrared-calculator-printer/

image from project’s Hackaday.io gallery
" data-image-caption="" data-medium-file="https://hackaday.com/wp-content/uploads/2021/12/irda-feature.jpg?w=400" data-large-file="https://hackaday.com/wp-content/uploads/2021/12/irda-feature.jpg?w=800">[Ziggurat29] had been playing around with infrared protocols, and realized he had a spare point-of-sale printer kicking around in his junk box. So he decided to whip up his own …read more (https://hackaday.com/2021/12/28/diy-infrared-calculator-printer/)

Enter the Matrix with This Custom PC Side Panel
https://hackaday.com/2021/12/28/enter-the-matrix-with-this-custom-pc-side-panel/

With a new Matrix movie out now, it’s hardly a surprise that we’re starting to see more and more projects centered around the franchise’s iconic “Digital Rain” effect. A few …read more (https://hackaday.com/2021/12/28/enter-the-matrix-with-this-custom-pc-side-panel/)

Clear Off the Coffee Table, It’s Pinball Time
https://hackaday.com/2021/12/28/clear-off-the-coffee-table-its-pinball-time/

Like many of us, [BuildXYZ] has always wanted to own a pinball machine, but doesn’t have the space to justify buying such a big and heavy toy. But where there’s …read more (https://hackaday.com/2021/12/28/clear-off-the-coffee-table-its-pinball-time/)

UV Printing PCBs
https://hackaday.com/2021/12/28/uv-printing-pcbs/

We always enjoy [Thomas Sanladerer’s] 3D printing videos. But his latest isn’t only about 3D printing. He shows how he uses a DLP printer — which has UV light, after …read more (https://hackaday.com/2021/12/28/uv-printing-pcbs/)

1950s Vacuum Tube Computer Replica Communicates Through USB
https://hackaday.com/2021/12/28/1950s-vacuum-tube-computer-replica-communicates-through-usb/

When we talk about a “computer” today, we generally picture an electronic machine that can perform various kinds of mathematical operations, manage its program flow, move data from one place …read more (https://hackaday.com/2021/12/28/1950s-vacuum-tube-computer-replica-communicates-through-usb/)

The Three Cent Motor Controller
https://hackaday.com/2021/12/29/the-three-cent-motor-controller/

If you follow the world of small microcontrollers you will certainly be familiar with the usual fare of Atmel, ARM Cortex, PIC, and others. But these aren’t the smallest or …read more (https://hackaday.com/2021/12/29/the-three-cent-motor-controller/)

Rats Learn to Play DOOM in This Automated VR Arena
https://hackaday.com/2021/12/29/rats-learn-to-play-doom-in-this-automated-vr-arena/

When we run an article with “DOOM” in the title, it’s typically another example of getting the venerable game running on some minimalist platform. This DOOM-based VR rig for rats, …read more (https://hackaday.com/2021/12/29/rats-learn-to-play-doom-in-this-automated-vr-arena/)