Most soldering irons are either on or off; it would be much more useful if you were able to change the temperature of the iron. So I designed a simple control circuit that will let you adjust the output of a heating element.
This Japanese water feature literally rocks!
A great transition from simple circuits to solderless breadboards, the springboard is a 50-year-old relic that’s difficult to find commercially these days, but easy and cheap to make.
Build this workable little practice amp in about an hour.
Build the simple span that launched the great age of iron bridge building.
Build your own quadrotor airframe from hardware store parts, then trick it out with stabilized onboard video and autonomous flight.
A father’s love inspired this A-bomb maker to invent a pneumatic actuator that’s used in robots today.
This sweet POV rig built from aluminum t-slot beams will help you keep your hands free to shoot sweet workbench videos.
A few times a year I volunteer to an arts organization and serve as their “house sound and light guy.” I usually run sound and do the lights for the traveling acts if they don’t have a tech with them.
Cartesian diver toy "Diving Tony" was a cereal box favorite. You can make one quickly from just a few parts. Use clear PETG tubing and a piece of solid styrene to make the diver follow your commands.
You’ve amassed a small fortune in diamonds, wood, coal, iron, food, and the other resources you need.
Learning about technology is a lot easier when you’re having fun — and shooting at targets is fun! With this amusement park–style arcade, you’ll fire beams of infrared light instead of projectiles to trigger automated knock-down targets you can customize with soda cans, ducks, robots, or anything else you feel like toppling with a well-placed shot.
