2025 One Hertz Challenge: An Ancient Transistor Counts The Seconds
https://hackaday.com/2025/07/12/2025-one-hertz-challenge-an-ancient-transistor-counts-the-seconds/

If you’ve worked with germanium transistors, you’ll know that many of them have a disappointingly low maximum frequency of operation. This has more to do with some of the popular …read more (https://hackaday.com/2025/07/12/2025-one-hertz-challenge-an-ancient-transistor-counts-the-seconds/)

Playing Snake with Digital Microfluidics
https://hackaday.com/2025/07/12/playing-snake-with-digital-microfluidics/

Display technology has come a long way since the advent of the CRT in the late 1800s (yes, really!). Since then, we’ve enjoyed the Nixie tubes, flip dots, gas plasma, …read more (https://hackaday.com/2025/07/12/playing-snake-with-digital-microfluidics/)

Die Cut Machine Makes Portable Metal Cuts
https://hackaday.com/2025/07/12/die-cut-machine-makes-portable-metal-cuts/

[Kevin Cheung] likes to upcycle old soda cans into — well — things. The metal is thin enough to cut by hand, but he’d started using a manual die-cutting machine, …read more (https://hackaday.com/2025/07/12/die-cut-machine-makes-portable-metal-cuts/)

An Open-Concept 3D Printer Using Cantilever Arms
https://hackaday.com/2025/07/12/an-open-concept-3d-printer-using-cantilever-arms/

If you’re looking for a more open, unenclosed 3D printer design than a cubic frame can accommodate, but don’t want to use a bed-slinger, you don’t have many options. [Boothy …read more (https://hackaday.com/2025/07/12/an-open-concept-3d-printer-using-cantilever-arms/)

What Will It Take to Restore a Serious Flight Simulator?
https://hackaday.com/2025/07/13/what-will-it-take-to-restore-a-serious-flight-simulator/

[Jared] managed to find a professional FAA-certified flight simulator at an auction (a disassembled, partial one anyway) and wondered, what would it take to rebuild it into the coolest flight …read more (https://hackaday.com/2025/07/13/what-will-it-take-to-restore-a-serious-flight-simulator/)

Jcorp Nomad: ESP32-S3 Offline Media Server in a Thumbdrive
https://hackaday.com/2025/07/13/jcorp-nomad-esp32-s3-offline-media-server-in-a-thumbdrive/

[Jackson Studner] wrote in to let us know about his ESP32-based media server: Jcorp Nomad. This project uses a ESP32-S3 to create a WiFi hotspot you can connect to from …read more (https://hackaday.com/2025/07/13/jcorp-nomad-esp32-s3-offline-media-server-in-a-thumbdrive/)

From Leash to Locomotion: CARA the Robotic Dog
https://hackaday.com/2025/07/13/from-leash-to-locomotion-cara-the-robotic-dog/