DIY high-power flashlight tutorial: three 18650 cells and an e-bike headlight for under ¥20

Universal magnetic base build guide — the step-by-step build guide for the universal magnetic base is here

7.4V glue-stick mini fan tutorial, adjustable speed

DIY flashlight — 3×18650 + e-bike LED, under ¥20

Spent ¥127 on a high-power flashlight that lights up a whole building — no more fear of walking at night; 15 cells give 12 hours of runtime

DIY an ultra-long-runtime seven-color night light? For the last science maker class of the term, I hand-built an ultra-long-runtime seven-color night light as a gift for my students

Universal magnetic base — step-by-step

Trash to treasure? Making my own solder-fume extractor! The perfect weld

Ep. 61 | Last time a friend asked for one made from 18650s — today we build it; the full build is in the video, please watch patiently

Build your own portable knife-sharpening gadget that every home needs? Kitchen knife gone blunt? Build a portable belt grinder on the cheap and never worry about a dull knife again

I always looked up to the spot-welding pros, until I got one myself… turns out with full-auto anyone can do it

Found a new trick for the AWithZ spot welder, haha: spot-welding light bulbs

The batteries I planted are ripe — picking a few to make a power bank