Make Your Own ESP32-Based Person Sensor, No Special Hardware Needed
https://hackaday.com/2026/01/28/make-your-own-esp32-based-person-sensor-no-special-hardware-needed/

Home automation with high usefulness and low annoyance tends to rely on reliable person sensing, and [francescopace]’s ESPectre shows one way to do that cheaply and easily by leveraging hardware …read more (https://hackaday.com/2026/01/28/make-your-own-esp32-based-person-sensor-no-special-hardware-needed/)

The Amazing Maser
https://hackaday.com/2026/01/28/the-amazing-maser/

While it has become a word, laser used to be an acronym: “light amplification by stimulated emission of radiation”. But there is an even older technology called a maser, which …read more (https://hackaday.com/2026/01/28/the-amazing-maser/)

Wikipedia as a Storage Medium
https://hackaday.com/2026/01/28/wikipedia-as-a-storage-medium/

We know that while the cost per byte of persistent storage has dropped hugely over the years, it’s still a pain to fork out for a new disk drive. This …read more (https://hackaday.com/2026/01/28/wikipedia-as-a-storage-medium/)

The Fancy Payment Cards of Taiwan
https://hackaday.com/2026/01/28/the-fancy-payment-cards-of-taiwan/

If you’re an old-schooler, you might still go to the local bar and pay for a beer with cash. You could even try and pay with a cheque, though the …read more (https://hackaday.com/2026/01/28/the-fancy-payment-cards-of-taiwan/)

FLOSS Weekly Episode 862: Have Your CAKE and Eat It Too
https://hackaday.com/2026/01/28/floss-weekly-episode-862-have-your-cake-and-eat-it-too/

This week Jonathan chats with Toke Hoiland-Jorgensen about CAKE_MQ, the newest Kernel innovation to combat Bufferbloat! What was the realization that made CAKE parallelization? When can we expect it in …read more (https://hackaday.com/2026/01/28/floss-weekly-episode-862-have-your-cake-and-eat-it-too/)

Using 3D Printing and Copper Tape to Make PCBs
https://hackaday.com/2026/01/28/using-3d-printing-and-copper-tape-to-make-pcbs/

In a recent video [QWZ Labs] demonstrates an interesting technique to use 3D printing to make creating custom PCBs rather straightforward even if all you have is a 3D printer …read more (https://hackaday.com/2026/01/28/using-3d-printing-and-copper-tape-to-make-pcbs/)

Light Following Robot Does It The Analog Way
https://hackaday.com/2026/01/28/light-following-robot-does-it-the-analog-way/