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 They rely on outdated technology and should not be nearly as expensive as they are, but market effects somehow keep prices …read more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/)

Venus Flytrap Takes Ride Through a Particle Accelerator
https://hackaday.com/2026/03/23/venus-flytrap-takes-ride-through-a-particle-accelerator/

In the blue corner, we have the VENUS FLYTRAP! In the red corner, we have the underdog of the century, AN ENTIRE PARTICLE ACCELERATOR. Yes, you read that right. When …read more (https://hackaday.com/2026/03/23/venus-flytrap-takes-ride-through-a-particle-accelerator/)

Disposable Vape Becomes Breath-Activated Synth
https://hackaday.com/2026/03/24/disposable-vape-becomes-breath-activated-synth/