Computer microphones Learn how to interface electret and dynamic microphones to the standard computer sound card. Metal detectors Theory of operation and schematics of the most common metal detectors used today: Very Low Frequency (VLF), Pulse Induction (PI) and Beat-Frequency Oscillator (BFO). Wireless microphone
Electronic Circuits on Circuit Exchange International (CXI) Introduction Welcome to Circuit Exchange International. My site contains electronic and radio schematics in 11 categories. There are sections on circuit simulation, design, analysis and a practical section containing tutorials. This is a free site and mostly my work, however I do welcome contributions. Everyone who has helped in the making of this site is listed on my credits page.
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