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Universal Preamplifier - ….(design added 08/08)

Use the CD-ROM Drive as a Audio CD Player Without the Computer - Most of the CDROMS available have an Audio-Out Output to either plug in the headphones or connect it to an amplifier.  This circuit enables one to use the CDROM as a stand alone Audio CD player without the computer.  This circuit is nothing but a power supply which supplies +5v, +12V and Ground to the CDROM drive and hence  can be used without the computer..... (added 10/05)

Vibrato Unit for Guitar - (schematic / circuit design added 08/08/08)

Voice Feedback Enhances Engineering Calculator - 07/11/02 EDN-Design Ideas: The screen shot in Figure 1 represents a Microsoft Excel 02 worksheet designed to implement VFI (voice-feedback interface)for an engineering calculator. The voice-interface technique has both practical and educational aspects. It automates the common task.....(design idea added 12/04)

Voice-Over Circuit - This is a circuit where a microphone and preamp circuit (voice circuit) have priority over any other audio signal. You can think of this as a one way intercom, if the main amplifier is used for listening to music, then when the push to talk switch is pressed, the amplifier is switched to the voice signal....(added 06/07)

Volume Control (Aaron Cake) - (circuit diagram added 1/07)

Warbler - (electronic circuit added 7/03)

Watt Compressor - The Watt Compressor is a super transparent vocal and instrument compressor that you can build. (added 11/05)

Weighting Filter for Audio Measurements - For noise measurements. Ideal for use with the AC Millivoltmeter above  (electronic circuit added 4/05)

Wien Bridge Theremin - (electronic circuit added 1/03)