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How To Build Good Contact Mics <img width="800" height="450" src="image alt=""/>We’re most familiar with sound as vibrations that travel through the atmosphere around us. However, sound can also travel through objects, too! If you want to pick it up, you’d
Lichtenberg Lightning in a Bottle, Thanks To The Magic of Particle Accelerators <img width="800" height="449" src="image alt=""/>You’ve probably seen Lichtenberg figures before, those lightning-like traces left by high-voltage discharge. The safe way to create them is using an electron beam to embed charge inside an acrylic
Origami on another Level with 3D Printing <img width="800" height="450" src="image alt="3D printed Origami mechanism"/>Origami has become known as a miracle technique for designers. Elegant compliant mechanisms can leverage the material properties of a single geometry in ways that are sometimes stronger than those
Hackaday Links: December 21, 2025 <img width="800" height="430" src="image alt="Hackaday Links Column Banner"/>It’s amazing how fragile our digital lives can be, and how quickly they can fall to pieces. Case in point: the digital dilemma that Paris Buttfield-Addison found himself in last
A Compact, Browser-Based ESP32 Oscilloscope <img width="800" height="450" src="image alt="A browser window is shown, in which a web page is displaying a green trace of a square wave."/>An oscilloscope is usually the most sensitive, and arguably most versatile, tool on a hacker’s workbench, often taking billions of samples per second to produce an accurate and informative representation
Building a Multi-Channel Pipette for Parallel Experimentation <img width="800" height="450" src="image alt="A device within a vertical rectangular frame is shown, with a control box on the front and an LCD display. Within the frame, a grid of syringes is seen held upright beneath two parallel plates."/>One major reason for the high cost of developing new drugs and other chemicals is the sheer number of experiments involved; designing a single new drug can require synthesizing and
Hardware Store Marauder’s Map is Clarkian Magic <img width="800" height="450" src="image alt="The map in action, along with a sample of the video feeds."/>The “Marauder’s Map” is a magical artifact from the Harry Potter franchise. That sort of magic isn’t real, but as Arthur C. Clarke famously pointed out, it doesn’t need to
The ‘Hidden’ Microphone inside the Sipeed NanoKVM <img width="800" height="450" src="image alt=""/>Recently, [Jeff Geerling] dropped into the bad press feeding frenzy around Sipeed’s NanoKVM, most notably because of a ‘hidden’ microphone that should have no business on a remote KVM solution.
Two-Wheeled Arduino Robot Project for Beginners <img width="800" height="450" src="image alt="2WD robot"/>Here’s a fun build from [RootSaid] that is suitable for people just getting started with microcontrollers and robotics — an Arduino-controlled two-wheeled robot. The video assumes you already have one
Linux On A Floppy: Still (Just About) Possible <img width="800" height="450" src="image alt=""/>Back in the early days of Linux, there were multiple floppy disk distributions. They made handy rescue or tinkering environments, and they packed in a surprising amount of useful stuff.
Reverse-Engineering the Intel 8087 Stack Circuitry <img width="800" height="336" src="image alt=""/>Although something that’s taken for granted these days, the ability to perform floating-point operations in hardware was, for the longest time, something reserved for people with big wallets. This began