PROJECTS
Flip-Dot Animation 68
Control an awesome mechanical display that flips
physical pixels magnetically.
Whittled Wonder 74
Sharpen your knife skills by carving a chain from a
tree branch.
Retro-Futuristic LED Ring 78
Make a mysterious, sci-fi inspired, glowy ring using
LED filaments.
Squishy Tech: Play with Your Food 82
Weird Resistors Part 1. Build an Atari Punk synth
circuit — then get fruity with it!
DIY CNC Workholding 88
These two universal clamps are easy to make and use
on any CNC router.
Electronics Fun & Fundamentals:
The Most Annoying Noise 92
Build a loud, irritating — and totally unpredictable —
screamer circuit.
Electro Etching Brass 96
Etch custom designs into brass with this nontoxic
process using salt water and electricity.
Amateur Scientist: Oops! There It Is 100
Serendipity is the origin of many inventions and
discoveries.
Remaking History: Rock Like an Egyptian 104
How did they make holes in granite, or hollow out
a hard-rock sarcophagus? Re-create the ancient
Egyptian stone drill
.
Toy Inventor’s Notebook:
Mini Mechanical Marvels 108
Tomy’s classic mechanical engineering toys are still
amazing today.
SKILL BUILDER
Transparent 3D Prints 114
Tips and techniques for getting glass-like prints from
clear filaments.
Home Automation for Makers 118
The free, open source Home Assistant platform can
connect all the things — including Matter and DIY
devices.
TOOLBOX
Toolbox 124
Gear up with the latest tools and kits for makers.
OVER THE TOP
Illuminating the Deep 128
Peter Hazel’s spectacular Lucy the octopus is a huge
undertaking.
Jesse Valez, Kelly Heaton, Victor Chaney, Charles Saadiq, Owen McAteer, Sean Nolan, Rich Cameron
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