Hidden Camera Build Proves You Can’t Trust Walnuts
<img width="800" height="450" src="![image](https://hackaday.com/wp-content/uploads/2025/12/Not-Just-a-Walnut-%E2%80%94-Its-a-Secret-Camera-I-Created-4-31-screenshot.png?w=800")
alt=""/>Typically, if you happened across a walnut lying about, you might consider eating it or throwing it to a friendly squirrel. However, as [Penguin DIY] demonstrates, it’s perfectly possible to 
alt=""/>Typically, if you happened across a walnut lying about, you might consider eating it or throwing it to a friendly squirrel. However, as [Penguin DIY] demonstrates, it’s perfectly possible to Hackaday
Hidden Camera Build Proves You Can’t Trust Walnuts
Typically, if you happened across a walnut lying about, you might consider eating it or throwing it to a friendly squirrel. However, as [Penguin DI...
Hackaday
Hidden Camera Build Proves You Can’t Trust Walnuts
Typically, if you happened across a walnut lying about, you might consider eating it or throwing it to a friendly squirrel. However, as [Penguin DI...
![image](https://hackaday.com/wp-content/uploads/2025/12/doomrate_fcfce5-e1765521710843.jpg?w=800")
alt="rat playing doom"/>We all know that you can play DOOM on nearly anything, but what about the lesser known work being done to let other species get in on the action? For 
![image](https://hackaday.com/wp-content/uploads/2025/12/cherry-G84-4100-featured.jpg?w=800")
alt=""/>The choice of a good keyboard is something which consumes a lot of time for many Hackaday readers, judging by the number of custom input device projects which make it 
![image](https://hackaday.com/wp-content/uploads/2016/05/microphone.jpg?w=800")
alt=""/>Hackaday Editors Elliot Williams and Al Williams met up to cover the best of Hackaday this week, and they want you to listen in. There were a hodgepodge of hacks 
![image](https://hackaday.com/wp-content/uploads/2025/12/I-Built-a-Retro-AI-Console-That-Shouldnt-Exist-7-20-screenshot.png?w=800")
alt=""/>The Landel Mailbug was a weird little thing. It combined a keyboard and a simple text display, and was intended to be a low-distraction method for checking your email. [CiferTech] 
![image](https://hackaday.com/wp-content/uploads/2016/01/darkarts.jpg?w=800")
alt=""/>Microsoft has published a patch-set for the Linux kernel, proposing the Hornet Linux Security Module (LSM). If you haven’t been keeping up with the kernel contributor scoreboard, Microsoft is #11 
![image](https://hackaday.com/wp-content/uploads/2023/05/mars-1.png?w=800")
alt=""/>When the orbit of NASA’s Mars Atmosphere and Volatile EvolutioN (MAVEN) spacecraft took it behind the Red Planet on December 6th, ground controllers expected a temporary loss of signal (LoS). 
![image](https://hackaday.com/wp-content/uploads/2025/11/hadimg_iphone_backupper_feat.jpg?w=800")
alt=""/>What if you find yourself as an iPhone owner, desiring a local backup solution — no wireless tech involved, no sending off data to someone else’s server, just an automatic 
![image](https://hackaday.com/wp-content/uploads/2025/12/Diapasonix-v1-1536x864-1.jpg?w=800")
alt=""/>There are a million and one MIDI controllers and synths on the market, but sometimes it’s just more satisfying to make your own. [Turi Scandurra] very much went his own 
![image](https://hackaday.com/wp-content/uploads/2025/12/tau.png?w=800")
alt=""/>If you get a chance to visit a computer history museum and see some of the very old computers, you’ll think they took up a full room. But if you ![image](https://hackaday.com/wp-content/uploads/2025/12/three_ring_drive.png?w=800")
alt="A man's hands are holding an assembly of 3D-printed parts. There is a white backplate, with a yellow circular piece running through the middle. The yellow piece is surrounded by metal rods. Another blue shaft runs through the left side of the assembly. A rougly-diamond shaped plate encompasses both of these shafts."/>Cycloidal drives have an entrancing motion, as well as a few other advantages – high torque and efficiency, low backlash, and compactness among them. However, much as [Sergei Mishin] likes 
![image](https://hackaday.com/wp-content/uploads/2025/12/SNAG-0937-16-9.png?w=800")
alt=""/>As technology marches on, gear that once required expensive lab equipment is now showing up in devices you can buy for less than a nice dinner. A case in point: 
![image](https://hackaday.com/wp-content/uploads/2025/11/hadimg_tinycore_feat.jpg?w=800")
alt=""/>Looking for an educational microcontroller board to get you or a loved one into electronics? Consider the tinyCore – a small and nifty hexagon-shaped ESP32 board by [MR. INDUSTRIES], simplified ![image](https://hackaday.com/wp-content/uploads/2019/09/ProgrammingSystem.jpg?w=800")
alt=""/>After you have written the code for some awesome application, you of course want other people to be able to use it. Although simply directing them to the source code 
![image](https://hackaday.com/wp-content/uploads/2025/12/Screenshot-2025-12-03-at-11-56-50-Inline-tube-adapter-3D-models-to-download-e1764781240314.png?w=800")
alt=""/>It’s happened to all of us: you find the perfect model for your needs — a bracket, a box, a cable clip, but it only comes in STL, and doesn’t 
![image](https://hackaday.com/wp-content/uploads/2025/11/hadimg_r36s_rust_feat.jpg?w=800")
alt=""/>The age of cheap and powerful devices is upon us. How about a 20 EUR handheld game console intended for retro game emulation, that runs Linux under the hood? [Luiz 
![image](https://hackaday.com/wp-content/uploads/2025/12/Screenshot-2025-12-08-103446-e1765153408737.png?w=800")
alt=""/>Aircraft parts generally have to meet very specific standards, because if certain parts fail, the aircraft falls out of the sky. This usually ends poorly, and is best avoided by ![image](https://hackaday.com/wp-content/uploads/2025/12/wolf1.png?w=800")
alt=""/>For as long as there have been supercomputers, people like us have seen the announcements and said, “Boy! I’d love to get some time on that computer.” But now that 
![image](https://hackaday.com/wp-content/uploads/2025/12/solid-state-volumetric-ancient-feature.jpg?w=800")
alt="King Tut, with less resolution than he's had since Deluxe Paint"/>There’s a type of dust-collector that’s been popular since the 1990s, where a cube of acrylic or glass is laser-etched in a three-dimensional pattern. Some people call them bubblegrams. While 
![image](https://hackaday.com/wp-content/uploads/2025/11/hadimg_kicad_template_feat.jpeg?w=800")
alt=""/>Ever think about all the moving parts involving a big KiCad project going into production? You need to provide manufacturer documentation, assembly instructions and renders for them to reference, every 