Month: December 2011

Collin’s Lab: DIY Contact Mic

Collin’s Lab: DIY Contact Mic

It’s amazing what a little disk can do … when it’s layered with piezoelectric crystals. Piezo disks are impressively sensitive to vibration and can easily be adapted to work as a contact microphones. The trick is the preamp – a basic circuit used to match the piezo’s signal to levels compatible with modern audio gear inputs. The resulting piezo/preamp combo can be used for electrifying an acoustic guitar or simply exploring the lesser-heard world of small sound around us.

Holiday Gift Guide 2011: Santa Claus Machines

Holiday Gift Guide 2011: Santa Claus Machines

If you’re planning on getting a 3D printer for yourself, the decisions about what to buy, and who to buy it from, can be daunting. If you’re trying to buy a gift for a 3D printing enthusiast, and don’t necessarily share his or her passion for the subject, they can be downright overwhelming, not to mention expensive. Fortunately, there are quality gift options short of buying a whole printer, and we’ve listed some great ones, below, from lowest to highest price. On the other hand, if you’re ready to take the plunge and buy a whole printer, our preferred makes and models are listed at the end of the guide, again in order of increasing price.

In the Maker Shed: LED Menorahs

In the Maker Shed: LED Menorahs

I’m not Jewish but if I were I would definitely have one of these LED Menorahs, available in the Maker Shed, on my desk. The Hanukkah Electronica(above) is an elegant, pre-assembled LED Menorah for celebrating the festival of lights. The Deluxe LED Menorah kit is an updated take on the traditional hanukkiyah, the nine-armed Hanukkah candelabrum. When you turn it on, it displays the correct configuration of LED “candles” for a given night of Hanukkah. The LEDs are lit up in the traditional sequence, with a gentle fade.