15 Dangerously Mad Projects for the Evil Genius

This wickedly inventive guide explains how to design and build 15 fiendishly fun electronics projects. Filled with photos and illustrations, 15 Dangerously Mad Projects for the Evil Genius includes step-by-step directions, as well as a construction primer for those who are new to electronics projects.

Using easy-to-find components and equipment, this do-it-yourself book shows you how to create a variety of mischievous gadgets, such as a remote-controlled laser, motorized multicolored LEDs that write in the air, and a surveillance robot. You'll also learn to use the highly popular Arduino microcontroller board with three of the projects.

Catapult Design, Construction And Competition With the Projectile Throwing Engines of the Ancients

Mini Weapons of Mass Destruction: Build Implements of Spitball Warfare

PopularMechanics.com selection for one of The Best DIY and Home Improvement Books of 2009

We’ve come a long way from the Peashooter Era: with the advent of modern household products and office supplies—binder clips, clothespins, rubber bands, ballpoint pens, toothpicks, paper clips, plastic utensils, and (of course) matches and barbeque lighters—troublemakers of all stripes have the components needed to build an impressive, if somewhat miniaturized, arsenal.

Toy designer John Austin provides detailed, step-by-step instructions for each project, including materials and ammo lists, clear diagrams, and construction tips, for mayhem-loving MacGyvers. The 35 devices include catapults, slingshots, minibombs, darts, and combustion shooters. Build a tiny trebuchet from paper clips and a D-cell battery. Wrap a penny in a string of paper caps to create a surprisingly impressive “bomb.” Several of the projects even include variations where combatants mount laser pointer sights to their shooters to increase their accuracy.

Finally, once you’ve built your armory, the author provides plans for a Top Secret Concealing Book to hide your stash, as well as targets for shooting practice. Never let your personal space go undefended again!

The Desktop Onager: An Awesome all Wood and Twine War Machine - Fiercely Fend Off Office Rivals -- Conveniently sized to sit on your desk, this intimidating little machine is an actual working reproduction of an onager. -- The weapon is all wood and twine with no metal parts, but it packs a big punch. Load it up with the included wooden balls or get creative with marshmallows, coffee creamers, erasers and more to see how many cubicles they can soar above before landing. -- Properly constructed, the onager has a range from 10 to 20 feet. The ancients were able to use nothing but wood and ropes to build machines that could hurl heavy stones great distances, now you can do the same to enforce peace in your office or dorm room. -- Build it yourself in under three hours, because this kit includes everything you need except for glue and a few simple tools like scissors, sandpaper, and a file. Colors may vary. -- Warning: This is a representative model of a real ancient military weapon. Use only with competent adult supervision.

Catapult Kit Lay Siege To The Doghouse! Right after you build your own working medieval catapult. All you'll need is glue, scissors and a steady hand to construct this wooden, Canadian-made siege engine kit. The finished catapult stands 6" tall x 5" wide x 10" long and will toss assorted stuff (meatballs?) 15 feet or further, depending upon the stuff. Comes with detailed instructions.

NOVA: Medieval Siege - The Scots inside Stirling Castle must have felt untouchable. Protected by a massive stone fortress, they prepared for a long drawn-out siege against the army of England's Edward the First. Fifty carpenters worked day and night to create the fourteenth century version of the atom bomb: the trebuchet-a fearsome, gravity-powered catapult dubbed "Warwolf" that was capable of hurling boulders, bee hives and plague-infected corpses long distances. Travel back to the Middle Ages and relive a fascinating turning point in warfare and medieval history.

- Enter the battlefield and experience the chaos of medieval warfare-200 years before the invention of the cannon
- Discover how the mechanized catapult sent English history and warfare in different directions
- Enter gigantic medieval castles and explore why these mighty fortresses became vulnerable to the "Warwolf"
- See how the medieval manuscripts provided clues in the trebuchet mystery
- See medieval experts create two competing full-scale catapults
- Travel to the banks of Loch Ness as newly designed catapults attempt to destroy a castle wall with 250 pound stone balls