2 Input Mixer:  (electronic circuit added 1/03)

2 Line Mixer:  (schematic / circuit added 9/06)

2 Line Output Combiner:  Convert consumer equipment stereo signal to mono or combine audio signal from two different equipments to1-input (added 4/02)

2-Input Mixer:  As simple as it gets.  mixer consists of two transistor-based preAmplifiers.  first one (designated "Mike in") offers higher gain. it works well with a regular dynamic microphone.  second one can be used to control audio input from a tape recorder/CD player.  (added 6/06)

3 Line Mixer:  (electronic circuit added 9/06)

6 Input Mixer:  3 line inputs and3 mic inputs (added 4/02)

6-Input Mixer:  (electronic circuit added 4/05)

Audio Mixer:  (electronic circuit added 7/03)

Audio Signal Source:  Electronic circuit design (added 02/05)

Circuit to Connect Telephone Equipment to Audio Mixer:  I have used this type of circuits for quick testing of telephone equipment. This is a quick hack that does not exactly resemble the characteristics of the real telephone network, but is enough for this kind if applications. If you want better simulation, change the resistor to 600 ohm and increase the power supply voltage. And by the way you can also feed signals to telephone if you connect the circuit output wires to small amplifier output. (added 11/05)

Ever Amplifier Bridging:  a design for a simple add-on bridging adapter for stereo power amplifiers (added 4/02)

FET Audio Mixer:  (circuit added 7/02)

High Quality Sound Mixer:  very ambitious and expected to be very expensive mixer project, modular design (added 4/02)

Line Mixer #2:  mix two line level sources to one-signal, includes separate volume controls for both signals, passive circuit (added 4/02)

Line Mixer:  I designed this circuit for one friend of mine to be used as a small portable DJ mixer. The circuit is an audio mixer circuit so simple as it can be. There are two dual logarithmic potentiometers in the circuit to adjust the input signal levels and some resistors to do the actual mixing. The circuit is totally passive, so no power supply is needed. The circuit is suitable to be uses as a mixer between two line level sources and one HIFI amplifier input. This circuit have been successfully used for mixing signals form two CD players or computer soundcard and CD players. There are many situations where simple mixer would be useful and commercially available mixer desks are too expensive and big....  (added 11/05)

Microphone Mixer:  Designed for3-dynamic microphones (added 6/06)

Mini Mixer:  (circuit added 10/06)

Portable Mixer:  High-quality modular design 9V Battery powered Very Low current drawing (added 9/04)

Simple Circuit to Connect Telephone Equipment to Audio Mixer:  I have used this type of circuits for quick testing of telephone equipment. This is a quick hack that does not exactly resemble the characteristics of the real telephone network, but is enough for this kind if applications. If you want better simulation, change the resistor to 600 ohm and increase the power supply voltage. And by the way you can also feed signals to telephone if you connect the circuit output wires to small amplifier output. (added 11/05)

Simple Line Mixer:  I designed this circuit for one friend of mine to be used as a small portable DJ mixer. The circuit is an audio mixer circuit so simple as it can be. There are two dual logarithmic potentiometers in the circuit to adjust the input signal levels and some resistors to do the actual mixing. The circuit is totally passive, so no power supply is needed. The circuit is suitable to be uses as a mixer between two line level sources and one HIFI amplifier input. This circuit have been successfully used for mixing signals form two CD players or computer soundcard and CD players. There are many situations where simple mixer would be useful and commercially available mixer desks are too expensive and big....  (added 11/05)

Six Channel Mixer and Amplifier:  (electronic circuit added 7/03)

Stereo Mixer :  Can mix four separate audio inputs to mono or stereo output signal (added 4/02)

Stereo Mixer:  (circuit added 10/06)

Telephone Test Circuit with Audio Mixer:  get Telephone audio to mixer or send audio to Telephone (added 4/05)

Two Input Mixer:  (electronic circuit added 1/03)

Two Line Output Combiner:  Convert consumer equipment stereo signal to mono or combine audio signal from two different equipments to1-input (added 4/02)

Unbalanced Mute Circuit for Audio Mixing Channels:  application note in PDF format (app note added 4/02)

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)

Voltage Controlled Mixer with Modulator:  (electronic circuit added 7/03)