When building a project to operate on battery power for long periods of time, having a microcontroller with a reliable and extremely low-power sleep mode is critical. When processing power …read more (https://hackaday.com/2026/04/27/2026-green-powered-challenge-adding-low-power-sleep-to-microcontrollers/)

The Challenges of 3D Printing Reliable Springs
https://hackaday.com/2026/04/27/the-challenges-of-3d-printing-reliable-springs/

Springs are great, but making them out of plastic tends to come with some downsides, for fairly obvious reasons. Creating a compliant mechanism that can be 3D printed and yet …read more (https://hackaday.com/2026/04/27/the-challenges-of-3d-printing-reliable-springs/)

A Different Kind of Ultrasonic Levitation
https://hackaday.com/2026/04/27/a-different-kind-of-ultrasonic-levitation/

Ultrasonic levitation is by now a familiar trick: one or more ultrasonic transducers create a standing wave, and small objects can be held in the nodes of this standing wave. …read more (https://hackaday.com/2026/04/27/a-different-kind-of-ultrasonic-levitation/)

Why Solid State Batteries Short
https://hackaday.com/2026/04/27/why-solid-state-batteries-short/

Solid state batteries, we are told, are the new hot battery technology that will replace lithium-ion batteries. Soon. Not that we haven’t heard that before. One reason it isn’t dominating …read more (https://hackaday.com/2026/04/27/why-solid-state-batteries-short/)

Sega Master System Controllers, Now With USB C
https://hackaday.com/2026/04/27/sega-master-system-controllers-now-with-usb-c/

USB wasn’t even a gleam in an engineer’s eye when the Sega Master System hit the market in 1985. Today, we’re up to USB 4 or something, and the USB …read more (https://hackaday.com/2026/04/27/sega-master-system-controllers-now-with-usb-c/)

A Guide to CubeSat Mission and Bus Design
https://hackaday.com/2026/04/28/a-guide-to-cubesat-mission-and-bus-design/

If you mention the word bus, you might think of public transportation or, more likely for us, a way to connect things together. But in the satellite world, the bus …read more (https://hackaday.com/2026/04/28/a-guide-to-cubesat-mission-and-bus-design/)

New Slicer Enables Horizontal Overhangs Without Support
https://hackaday.com/2026/04/28/new-slicer-enables-horizontal-overhangs-without-support/

There’s a rule of thumb when it comes to FDM printing that overhangs are really only possible to an angle of around 45 degrees or so. If you try to …read more (https://hackaday.com/2026/04/28/new-slicer-enables-horizontal-overhangs-without-support/)

The GPS III Rollout is Almost Complete, But What is it?
https://hackaday.com/2026/04/28/the-gps-iii-rollout-is-almost-complete-but-what-is-it/