diy

Ben Krasnow of Applied Science builds and operates a simple mass spectrometer, using it to measure potassium isotopes in a salt substitute. He explains the design choices and the theory behind it.

This Old House's Ross Trethewey explains MERV filter ratings and how air filtration works, then shows how to build a localized DIY air filter, including a box fan with multiple filters.

A hobbyist builds a prototype full-frame CCD camera from scratch, with open-source design files and a custom PCB. The video shows the first, still rough prototype.

Ben Krasnow of Applied Science builds a DIY microbalance from an analog panel meter with an optical servo loop. It reaches about 5 micrograms of precision and is used to weigh a single eyelash at around 35 micrograms.

Tech Ingredients shows how to build cheap, high-performance flat-panel speakers using audio exciters on sheet materials such as foam-core board. It explains how distributed-mode speakers work and walks through experiments to find good designs.

Ben Krasnow shows the first image from his home-built scanning electron microscope, after months of work, and walks through how the parts operate together.

A DIY demonstration of a fan-and-screen mosquito trap that uses carbonated water as a CO2 attractant. The creator reports catching about 8,000 mosquitoes in two nights.

A two-minute demo of SmartKnob View, an open-source input knob built from a brushless gimbal motor, magnetic encoder and round LCD. Closed-loop torque control gives software-defined detents and end stops.

Essential Craftsman follows up on his earlier video about a DIY approach to sleep apnea. It centers on forcing nose breathing during sleep with mouth taping and nasal strips, and says to seek medical guidance.

Short BBC Earth clip from Life of Mammals in which David Attenborough shows orangutans imitating human behaviors like washing clothes with soap and using tools.

DIY Perks builds a realistic artificial sun for dark winters, using a powerful water-cooled LED, a satellite dish reflector for near-parallel rays, and a scattering layer to mimic the blue sky. The video explains the optics behind why most lamps do not look like sunlight and shows the build and its results.

DIY Perks shows how to modify devices that use older USB connectors so they charge and connect over USB Type-C. He solders in a USB-C connector board and works through cases such as dongle-dependent gadgets and a mouse receiver.

Tech Ingredients shows how to build flat panel speakers from exciters and foam board, with construction guidelines, measured SPL comparisons and a complete system playing music.

A woodworker shows how his table saw accident happened, why it happened and how to avoid a similar one. He describes severe hand lacerations from a blade contact.

NightHawkInLight shows how to make radiative sky cooling paint from grocery and hardware store materials, including a novel calcium carbonate microsphere synthesis. The paint can cool a surface below ambient air temperature in direct sunlight without electricity.

A University of Michigan Medicine demonstration of building a cheap DIY air purifier from a box fan and a HEPA or high-MERV filter using hardware-store parts. It explains why this helps against dust, smoke and viruses and ties it to local air quality readings.

A short project video in which Greg Raiz turns a 32-inch eInk display into a wireless digital newspaper showing daily front pages. It runs for months on battery, and the code is published on GitHub.

DIY Perks shows how to turn old or smashed TVs and monitors into realistic artificial window lights, using the backlight and Fresnel lens to simulate distant daylight.

DIY Perks builds a webcam mod using a two-way mirror in a box so the camera sits behind the screen image. This allows real eye contact on video calls.

The Thought Emporium's host describes making and taking a DIY gene therapy to treat his own lactose intolerance. It uses an AAV virus to deliver DNA coding for the lactose-digesting enzyme, made with biohacker Gabriel Licina's help.

The first installment of a hobbyist's video diary documenting his build of a giant walking spider-like vehicle. The footage is casual and self-shot, following the early stages of the project.

Sam Zeloof shows the upgraded second iteration of his homemade silicon integrated circuit fabrication process, producing chips with around a thousand transistors in his garage. It is a short overview of what the home fab can now do.

A beginner-focused tutorial on freehand knife sharpening with a single stone, aiming for a shaving-sharp edge in about five minutes.

Part one of Look Mum No Computer's series on buying a whole church pipe organ, covering how it was removed from its home. The series goes on to restoring it and rewiring it for MIDI.

Technology Connections experiments with filtering white and colored LEDs to make holiday lights look less garish. He explains why narrowband LED strings look harsh compared with incandescent bulbs.

Jeri Ellsworth shows step by step how to make an NMOS transistor at home using a kiln, rust remover, spin-on dopant, eBay wafers and vinyl stickers.

Applied Science builds a replica Apollo DSKY using an electroluminescent driver circuit and screen-printed conductive ink, with source and PCB files published.

A man spends six months and $1500 making a chicken sandwich entirely from scratch: growing vegetables, making salt from seawater, milking a cow for cheese, grinding wheat, collecting honey and killing a chicken.

A short Google Japan promotional video, in Japanese, for Gboard Double-Sided, a keyboard with no back side that comes in a paper-craft version and a full electronics version. It is a playful April-Fools-style product concept.

Sean Hodgins shows the build of the Arduino-based glitter bomb package-theft trap he made with Mark Rober, covering the electronics and the problems that came up. The code and schematics are on GitHub.

Breaking Taps tries to build semiconductor fabrication capability at home, working through decades of lithography history while chasing one-micrometer features. It documents the equipment, process steps and many setbacks along the way.

Zack Freedman gives advice on why makers fail to finish projects, including scrapping bad ideas, showing work publicly and writing a plan that keeps projects fun. It is aimed at hardware DIY but generalizes.

The Thought Emporium's update on the home-brewed gene therapy he took to cure his lactose intolerance. It reports how the effect held up over two years and what future versions might look like.

The Thought Emporium builds a homemade multi-electrode array, grows human neurons on it and attempts to take readings. It is the first part of a series aimed at connecting living neurons to a computer.

The Thought Emporium shows how easily bacteria can be genetically modified to produce fluorescent proteins and even bioluminesce, with techniques doable at home. It links to companion videos on incubators, DNA extraction and gels.

Peter Sripol shows his homemade Part 103 electric airplane flying, built from hobby brushless motors and batteries. The video covers the first flight out of ground effect.

A roughly 90-minute film of John Dobson building a Dobsonian telescope step by step, including hand-grinding the mirror.

The Thought Emporium grows living rat neurons on an electrode array and tries to train them to play Doom. It is part of a series on biological computing.

Cody's Lab builds a prototype algae growing panel as an experiment before making more. The channel also shows growing algae for consumption.

Mark Rober builds a hot tub filled with sand fluidized by air blown from below, so that the sand behaves like a liquid. He explains how fluidized beds work and shows people swimming in them.