Lie Detector Electronic Kit and Circuit Explanation
We’ve had a few emails and posts about folks who wanted to build their own lie detector, here’s one (and how it works) – “The circuit diagram of the Lie Detector is shown above. It consists of three transistors (TR1 to TR3), a capacitor (C1), two lights or LEDs (L1 & L2), five resistors (R1 to R5), and a variable resistor (VR1). Suitable transistors to use are BC547, BC548 or BC549, or any other small NPN transistor. The Lie Detector circuit works based on the fact that a person’s skin resistance changes when they sweat (sweating because they’re lying). Dry skin has a resistance of about 1 million ohms, whereas the resistance of moist skin is reduced by a factor of ten or more.” Link.
Wow, this stereoscopic motion picture camera uses two Mac mini’s as its brain – “The built in recorder of the 3DVX3 is comprised of two extensively modified Apple Mac Mini computers. The compact size and CPU horsepower offered by the Mac Mini coupled with the power of Mac OS X make the 3DVX3 a truly unique camcorder. Flash memory modules replace hard drives in the Mac Minis for fast booting and reduced operating temperature.” [
Harvey writes “Where US Taxpayer’s have already bought the best equipment (Like $2,000 hammers) and you can pick up it up for a faraction of its original cost. Get electronics and test equipment, pumps and motors, battaries and computer equipment by the pallet! Buy entire pallets of parts at a time and make the impractical dream a reality! NOTE: Read the fine print and watch out for shipping costs!” 
Makers, are you OK with paying more money for ringtone than you would for a complete song? These folks seem to think so – “According to The NPD Group, a leading provider of consumer and retail information, consumers are willing to pay more for a 30-second snippet of a song track to be used as a ringtone than to download an entire song track. In addition, consumers are willing to pay a premium (above the average $0.99 price for paid music downloads from the Web) for the convenience of downloading a full song directly to their mobile phone wherever and whenever they want.” 
Jason from Preshrunk writes “The gang over at Vestal Design have made and documented a really killer bar made out of somewhere in the neighborhood of 700 discarded library books. Well, I know I’d totally make one if I had that many books laying around.” 
News to me, the Digg folks are on it “With all the attention on the new ministore presentation, no one seems to have noticed that iTunes 6.02 enables video-sharing to your local network. Whether it’s intended for an upcoming home media appliance or not I don’t know, but it brings videos up to par with music.” 
Excellent set of photos of the construction of cigar box guitars from Pasque – “I am building guitars out of cigar boxes with my students. Here are some photos of the prototype I built at home (now updated with photos of my students’ guitars). I went begging and got a bunch of wooden fingerjointed cigar boxes. The fee… a photo of my students with their guitars, a fair trade. The project idea came from Make magazine