Circuit Lake

Electronic Project and Circuit Collection

Audio




Free-Air Musical Instrument, Airmonica

March 19, 2012 By: admin Category: Arduino, Audio, Miscellaneous Comments Off

Arduino Air Instrument

The airmonica is an easy-to-learn musical instrument that you can use to perform harmonic musical ditties by accompanying a tri-tone arpeggiator. You can expand the device in any way that will make it your own custom instrument.

Automatic Volume Control System

March 11, 2012 By: admin Category: Audio, Control, Microcontroller, Project, Remote, Renesas No Comments →

Automatic Volume Control System Project

The project shows you how to build an automatic volume control system for TV-sets, home audio systems, etc. The system measures current volume level from Audio AUX output and controls audio volume by Infrared commands. The idea is simple – in many situations TV-set user has to adjust the volume: when he or she watch [...]

HT8950 Robot Voice Generator

February 24, 2012 By: admin Category: Audio, Miscellaneous, Project No Comments →

Robot Voice

This project shows you how to build a robot voice generator with IC HT8950, a powerful voice modulating IC. The circuit has Robot function, Vibrato function and 7-step level shifting pitch. The construction is extremely simple and the unit is very small.

Easy Voice Commander

February 05, 2012 By: admin Category: Audio, Control, Digital, Interfacing, Microcontroller, Miscellaneous, Renesas No Comments →

Easy Voice Commander Project

The purpose of the project is to build uncomplicated voice recognition system based on M32C/84 microcontroller. The main part consists of telephone, some amplifiers, and development board.

The project used to operational amplifiers in the analog part, the first one, provide amplification to the signal of 220mV p-p generated by signal transducer (a microphone electret) and [...]