What happens when you add a few wires and a microcontroller to your door buzzer? You can let yourself into your building from the outside!
Just updated your iPhone to iOS 18? You'll find a ton of hot new features for some of your most-used Apple apps. Dive in and see for yourself:
Spice Rack Explosives:
How to Make Gunpowder with Salt & Sugar
How To:
Turn Water into Fuel by Building This DIY Oxyhydrogen Generator
How To:
Turn a Microwave Oven Transformer into a High Amperage Metal Melter!
How To:
Build Your Own Mini Altoids Guitar Amp for About $5
How To:
Make Slow Burning Fuses from Yarn, Sugar, & Potassium Nitrate
DIY Polygraph Machine:
Detect Lies with Tin Foil, Wire and Arduino
How To:
DIY Rocket Propellant! How to Cook Solid Rocket Fuels Using Common Household Ingredients
How To:
Make a Hydrogen Fireball from Aluminum Foil and Toilet Bowl Cleaner
How To:
Weapons for the Urban Guerrilla: Make a Taser from a Disposable Camera
How To:
Make Solid Rocket Fuel at Home with Old Newspapers
DIY Blacksmithing:
Forge Your Own Steel at Home!
Bat Science:
How Realistic Are Batman's Gadgets in Dark Knight Rises?
How To:
Build Your Own Projection Microscope with a Syringe, Laser Pointer, and Drop of Water
Dragon Safari:
The Incredible Metamorphosis from Nymph to Dragonfly
Supercool Science Trick:
How to Turn Water into Ice on Command
How To:
Build a Long Range Laser Spy System for Eavesdropping on Your Neighbors
News:
This Real-Life, Working WALL-E Robot Is Absolutely Perfect (And Built Entirely from Scratch)
How To:
10 Things to Do at a Birthday Party with Liquid Nitrogen
How To:
Use a Funnel and Butane Torch to Make a Huge Corn-Flour Fireball
10th Time's the Charm:
Success and Failures of Making a Jam Jar Jet Engine
Spice Rack Explosives:
How to Make Gunpowder with Salt & Sugar
How To:
Turn Water into Fuel by Building This DIY Oxyhydrogen Generator
How To:
Turn a Microwave Oven Transformer into a High Amperage Metal Melter!
How To:
Build Your Own Mini Altoids Guitar Amp for About $5
How To:
Make Slow Burning Fuses from Yarn, Sugar, & Potassium Nitrate
DIY Polygraph Machine:
Detect Lies with Tin Foil, Wire and Arduino
How To:
DIY Rocket Propellant! How to Cook Solid Rocket Fuels Using Common Household Ingredients
How To:
Make a Hydrogen Fireball from Aluminum Foil and Toilet Bowl Cleaner
How To:
Weapons for the Urban Guerrilla: Make a Taser from a Disposable Camera
How To:
Make Solid Rocket Fuel at Home with Old Newspapers
DIY Blacksmithing:
Forge Your Own Steel at Home!
Bat Science:
How Realistic Are Batman's Gadgets in Dark Knight Rises?
How To:
Build Your Own Projection Microscope with a Syringe, Laser Pointer, and Drop of Water
Supercool Science Trick:
How to Turn Water into Ice on Command
Dragon Safari:
The Incredible Metamorphosis from Nymph to Dragonfly
How To:
Build a Long Range Laser Spy System for Eavesdropping on Your Neighbors
How To:
10 Things to Do at a Birthday Party with Liquid Nitrogen
News:
This Real-Life, Working WALL-E Robot Is Absolutely Perfect (And Built Entirely from Scratch)
How To:
Use a Funnel and Butane Torch to Make a Huge Corn-Flour Fireball
Inception in Real Life:
Make These Lucid Dreaming Glasses and Take Control of Your Dreams
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