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.  You should buy a D-type power connecter to connect this  circuit's outputs to the CDROM. The details of the D connector are shown along with the circuit diagram.... (added 10/05)

Vacuum Tube Theremin:  (circuit added 10/06)

Vocal Eliminator:  Een vocal eliminator (wie weet hier een goede Nederlandse term voor?) is een apparaat dat de zang uit een lied filtert. Ze worden vaak door professionele zangers gebruikt. Amateurs zouden er graag een willen hebben, maar ze zijn vaak nogal prijzig. Op bruiloften en partijen moeten ze dus gewoon harder zingen dan de artiesten op de cd. Wel... nu niet meer! Bouw deze vocal eliminator en verbaas je vrienden! (added 1/06)

Voice Feedback Enhances Engineering Calculator:  07/11/02 EDN Design Ideas  /  (added 12/04)  The screen shot in Figure 1 represents a Microsoft Excel 02 EDN Design Ideas  /  (added 12/04) 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 of finding the values of two resistors for a given ratio....

Voice over Circuit:  Switches automatically from sound source to microph1-when enough sound comes in from microphone. (added 4/02)

Voiceover:  (project / circuit added 9/06)

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:  (schematic / circuit design added 9/02)

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