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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 that sounds really good, to boot. [Daniel] picked up the idea of using … [Read more...]
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 array simply to get a programmable display. His solution to this … [Read more...]
[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, crazy stuff. [Bunnie]'s laptop is an attempt to … [Read more...]
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