typing

Richard Feldman's GOTO Copenhagen 2022 talk on why dynamic languages like Python, Ruby, PHP and JavaScript rose in the 1990s and why each now has a popular static type checker. It argues that modern static typing recovers the advantages that made dynamic languages attractive.

A short demo of typing on the Modos Paper Monitor, an open e-ink monitor, using 4-level grayscale to show low latency.

Engineer Stuff Made Here builds two new supposedly unpickable locks with different designs and sends them to the Lock Picking Lawyer to see whether they can be defeated. The video covers the novel anti-picking mechanisms.

William Osman describes helping build parts of the MrBeast Squid Game event, including hacking together hundreds of wifi-controlled blood packs in about three weeks. He covers the chaos and near-failures along the way.

Stuff Made Here builds a powder-actuated baseball bat designed to hit a ball past Babe Ruth's record distance, with Smarter Every Day contributing. It covers the engineering of the explosive-assisted swing.

José Valim's ElixirConf US 2023 closing keynote on the foundations of the Elixir type system, covering set-theoretic types and gradual typing with strong arrows.

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.

A maker's time-lapse of building a working computer inside a LEGO-style brick, using a tiny 0.42-inch OLED screen, with a demo at the end.

The first lesson of MangoJelly's FreeCAD 0.20 beginner course, covering setup, preferences and navigation. The series teaches fundamentals through complete workflows such as sketching, Part Design and STL export.

The introduction to MangoJelly's beginner course for FreeCAD 1.0. The course teaches solid modeling with the Part Design, Sketcher and Part workbenches.

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.

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.

Stuff Made Here builds a handwriting robot and sends its output to a handwriting expert to see whether it can pass as forgery. It walks through the engineering trials and errors along the way.

Zack Freedman introduces Gridfinity, his free, open-source modular workshop storage system of 3D-printable bins and baseplates. The video walks through the design, the parametric templates and the many module types that fit parts, tools and accessories.

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.

The trailer for Tim Hunkin's series The Secret Life of Components, eight guides to mechanical and electromechanical parts for designers and makers.

Maker's Muse designs a 3D-printed and laser-cut puzzle box to test whether wild sulphur-crested cockatoos can solve it. He documents how the birds work it out.

The Plasticity creator explains what a geometry kernel is and compares commercial options C3D, ACIS, and Parasolid, describing his months of research and why he chose as he did.

LightningOnDemand revives a pulsed Lorentz plasma cannon, using modern capacitors to extend its range and increase the delivered energy. It is a high-voltage, high-current hobby demonstration.

Stuff Made Here builds a device that lets a blind person perceive their surroundings by touch, using an iPad's lidar and a mechanical tactile display driven by motors. The video walks through the build and the limits he hit.

Hobbyist Wesley Kagan shows his Miata running and driving with a homemade version of Koenigsegg's freevalve camless valve technology. The build uses open CAD files and code and he describes it as an ongoing work in progress.

Quint BUILDs tests a rooftop water storage setup in which solar power pumps water up to the roof and a turbine generates power later. He works through the numbers to show how much energy it actually stores.

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.

Joe Barnard of BPS.space shows his model rocket Scout F landing vertically like a SpaceX booster after seven years of attempts. The video documents the successful landing and the build-up to it.

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.

Stuff Made Here designs and builds an "unpickable" lock, then calls in a locksmith to see if it can be defeated. It covers the mechanical design effort and the attempt to pick it.

A hobbyist build-and-experiment video on rotating detonation engines (RDEs), where a continuous detonation wave spins around an annular chamber. The creator 3D prints parts and tests a small engine, while being candid about uncertainty over whether a true rotating wave was achieved.

Mark Rober builds a third-generation glitter bomb trap and films it catching package thieves, with phone trackers and fart spray included. It shows the engineering behind the build and the comic payoff.

A Veritasium video touring Relativity Space and explaining why 3D printing whole rockets cuts tooling costs, allows rapid iteration, reduces part count and enables new designs. It includes an interview with Scott Manley on aerospace engineering.

Adam Savage and engineer Kipp Bradford build a compact wearable refrigeration system to keep Adam cool under costumes, modeled on the cooling unit in a NASA spacesuit simulator. It is a long, hands-on build session.

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.

Mark Rober's holiday video features the near-final version of his glitter bomb package, built to deter thieves. It is part of his series of elaborate revenge traps against porch pirates and car thieves.

Adam Savage builds a Victorian-style rickshaw carriage for Boston Dynamics' Spot robot to pull, with him riding as passenger. The video covers the build and the engineering problems of pairing cutting-edge robotics with vintage transport, such as tuning the payload through Spot's API.

ElixirConf EU 2023 talk by Giuseppe Castagna and Guillaume Duboc on bringing set-theoretic types to Elixir, and the benefits such a type system could offer such as catching bugs.

A four-minute tour of the TeXmacs scientific editor, showing math typing, figures, citations, a drawing tool, document styles, HTML export, presentations and animations.