A single fully-charged AA battery is incapable of powering high-flux LEDs. However with the aid of a toroid, bipolar NPN transistor, and the popular Joule Thief circuit, you can even turn "dead" batteries into a capable flashlight power source.
Whether it’s the “Fukushima plume” or giant monsters on your mind, the classic Civil Defense CDV-715 Geiger counter has a perfect retro-style case to house a modern, sensitive digital Geiger counter. Replace its guts and add a new analog-digital LCD meter and you're ready to detect particle flux from radioactive lizards. Make:'s go-to Geiger guy John Iovine shows you how.
Do the local animals think your front lawn is their personal toilet? Keep those unwanted visitors away.
Cast the tabletop and trough in one piece, then make it shine. "DIY Pete" Sveen shows you how, with complete steps and video tutorial.
When Evil Ninja Monster Ballerinas attack - ModULO can save the day! Build this 3D printed robot action figure for yourself.
Make your own Great Ball Contraption (GBC) using Lego and Makeblock.
Come and make this mean, green, robotic machine ... make it laugh and make it sing!
The internet and audio processing software led to the popularity of musical mashups, now you can remix old band t-shirts to create new mashup compositions that you can wear.
Turn tunes into 'toons with a robot arm controlled via headphone jack.
My son was frustrated that the original battery cover on his Lotus Elise sports car wouldn’t quite fit over his new, larger battery. It was the perfect opportunity to try out my new strip heater by making a new cover.
Build a new kind of folding glider that’s blasted skyward by a compressed air launcher!
Soothe ragged nerves with this Arduino-based synthesized sound system. Robot guru Gordon McComb updates a classic 1970s sonic gadget — the Chord Egg — with MIDI for the digital age.
