Arduino-Based Tube Stereo Preamp Project

Budgie preamp (Source: S. Parks)

If you happen to be electrical engineer as well as an audiophile, you’re in luck. With an Arduino, some typical components, and a little knowhow, you can build DIY tube stereo preamplifier design. Shannon Parks—owner of Mahomet, IL-based Parks Audio—designed … Continue reading

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Issue 290: EQ Answers

EQ

Problem 1—What is an R-C snubber, and what is a typical application for one? Answer 1—An R-C snubber is the series combination of a resistor and a capacitor that is placed in parallel with a switching element that controls the … Continue reading

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Issue 288: EQ Answers

EQ

Problem 1—When designing a pair of band-splitting filters (for, say, an audio crossover), why is it important to match frequencies of the –3-dB points of the low-pass and high-pass responses? Answer 1—The cutoff frequencies of the two filters should be … Continue reading

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DIY Network-Ready Polyphonic Music Controller

Portner's Chimaera project

Hans Peter Portner’s Chimaera project is a touch-less, expressive, network-ready, polyphonic music controller released as open source hardware. It is a mixed analog/digital offspring of the Theremin. An array of analog, linear Hall effect sensors make up a continuous 2-D … Continue reading

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WIZnet Design Challenge Winners (Sponsored)

First Prize — Chimaera: The Poly-Magneto-Phonic Theremin, Hans Peter Portner (Switzerland)

WIZnet’s Connect the Magic 2014 Design Challenge provided electronics enthusiasts with the opportunity to use WIZnet’s WIZ550io Ethernet module in a project for a chance to win a share of $15,000 in prizes. The submission deadline was August 3, 2014, and soon … Continue reading

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