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Samedi, 16 Juillet 2011 03:00

Contraceptive Comeback: The Maligned IUD Gets a Second Chance

Dalkon Shield
1971-1974
The clawlike appendages that kept the Dalkon Shield in place made removal painful and could perforate the uterus. The Shield also caused cases of pelvic...

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Samedi, 16 Juillet 2011 02:42

Decode: Make Sense of London's Tube System

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July 15, 2011 |
8:42 pm

The 2012 London Olympics committee has issued this revised map of the Tube system and event venues. Sadly, it didn’t label the stations. Each stop is a letter, and each colored line spells a word that ends w...

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Vendredi, 15 Juillet 2011 22:14

Build Your Own Guitar Amplifier

If you know how to solder and plug some components into a breadboard, you have all the skills you need to build your own homemade guitar amplifier. It doesn’t have to involve any tubes or dangerous voltage. In fact, the design in this project is powered by a simple 9-volt battery and built only with parts that you can pick up today at an electronics store.

The design is based on the “Little Gem” amplifier circuit from runoffgroove.com. There are a lot of other great guitar circuits there for you to explore once you get the hang of it!