Raspberry Pi. iPhone videography & DIY XLR mic-to-iPhone adapter : Indy News. Electrical Engineering and Computer Science | 6.002 Circuits and Electronics, Spring 2007. Hobby projects - Simple electronic circuits. 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) Circuit diagrams search engine :: High-Voltage-Lab.com :: audio, radio, sensors, digital electronics... Electronic Circuits - Free Electronic Circuits.