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Most audio tube amps we see use common tubes – usually a 12AX7 for the preamp and one of the more common power tubes such as an EL34.[Daniel], on the other hand, decided to build his own audio tube amp with a 13EM7, a tube originally used for a television’s vertical oscillator. The resulting project is a wonderful stereo amp … Read the rest
With the help of a microcontroller, a few strings of GE Color Effect Christmas lights can be easily turned into a fully programmable LED strip, or if you are so inclined, a huge RGB LED display. [Hubbe] had a few strings of these Color Effect Christmas lights, but didn’t want to spend the time arranging his light strings in an … Read the rest
[Bunnie Huang], creator of the Chumby and artisan of chips and electrons, is building his own completely open source laptop. It’s called the Novena, and is powered by a quad-core ARM CPU, it’s got enough bells and whistles to make any hacker happy including an on-board FPGA, dual Ethernet ports, and enough GPIO pins to do some crazy, … Read the rest
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