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This project builds a hydraulic arm trainer: a four-axis articulated arm made of wood, where each joint is driven by a syring...
This project builds a two-axis diode laser engraver: an aluminium-extrusion gantry with stepper-driven X and Y axes, a blue d...
This project builds a desktop wind tunnel — a transparent test section fed by a fan through a honeycomb flow straightener, wi...
This project builds a tendon-driven robotic hand: a 3D-printed hand with five articulated fingers, where thin fishing-line te...
This project builds a working gamma-type Stirling engine model — an external-combustion heat engine that runs on the temperat...
This project builds a dual-axis solar tracker that keeps a small photovoltaic panel pointed at the sun through the day. Four...
When demand outruns supply — a weak grid, an overloaded generator, a solar-battery system at its limit — something has to giv...
Lithium-ion cells are energy-dense but unforgiving — overcharge them and they vent, over-discharge them and they die, short t...
Sound-operated switching is one of the most satisfying introductory electronics builds — a sharp clap toggles a lamp on, anot...
