In the early days of aviation, pilots or their navigators used a plethora of tools to solve common navigation and piloting problems. There was definitely a need for some kind …read more (https://hackaday.com/2026/03/23/the-zero-power-flight-computer/)

A Simple Switch for Simply too much Current
https://hackaday.com/2026/03/23/a-simple-switch-for-simply-too-much-current/

A switch is simple: connect two pieces of metal together and bam! Except, it’s not that simple at high currents. How much current? Just about 400 car batteries worth would …read more (https://hackaday.com/2026/03/23/a-simple-switch-for-simply-too-much-current/)

Linux Fu: UPNP A Port Mapping Odyssey
https://hackaday.com/2026/03/23/linux-fu-upnp-a-port-mapping-odyssey/

If you’ve ever run a game server or used BitTorrent, you probably know that life is easier if your router supports UPnP (Universal Plug and Play). This is a fairly …read more (https://hackaday.com/2026/03/23/linux-fu-upnp-a-port-mapping-odyssey/)

Build This Open-Source Graphics Calculator
https://hackaday.com/2026/03/23/build-this-open-source-graphics-calculator/

Graphics calculators are one of those strange technological cul-de-sacs. They rely on outdated technology and should not be nearly as expensive as they are, but market effects somehow keep prices …read more (https://hackaday.com/2026/03/23/build-this-open-source-graphics-calculator/)

Acoustic Drone Detection On the Cheap with ESP32
https://hackaday.com/2026/03/23/acoustic-drone-detection-on-the-cheap-with-esp32/

We don’t usually speculate on the true identity of the hackers behind these projects, but when [TN666]’s accoustic drone-detector crossed our desk with the name “Batear”, we couldn’t help but …read more (https://hackaday.com/2026/03/23/acoustic-drone-detection-on-the-cheap-with-esp32/)

PicoZ80 is a Drop-in Replacement for Everyone’s Favorite Zilog CPU
https://hackaday.com/2026/03/23/picoz80-is-a-drop-in-replacement-for-everyones-favorite-zilog-cpu/

The Z80 has been gone a couple of years now, but it’s very much not forgotten. Still, the day when new-old-stock and salvaged DIP-40 packaged Z80s will be hard to …read more (https://hackaday.com/2026/03/23/picoz80-is-a-drop-in-replacement-for-everyones-favorite-zilog-cpu/)

Low Self-Discharge, High-Voltage Supercapacitors Using Porous Carbon
https://hackaday.com/2026/03/23/low-self-discharge-high-voltage-supercapacitors-using-porous-carbon/

Supercapacitors rely mostly on double-layer capacitance to bridge the divide between chemical batteries and traditional capacitors, but they come with a number of weaknesses. Paramount among these are their relatively …read more (https://hackaday.com/2026/03/23/low-self-discharge-high-voltage-supercapacitors-using-porous-carbon/)