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Audio Circuits:  Mixers
Circuits
Amplifier -- Main Page          Audio Circuits -- Main Page
 

Last Updated: October 18, 2017 05:04 AM


Links to electronic circuits, electronic schematics, designs for engineers, hobbyists, students & inventors:

2 Input Mixer -  Sometimes there is need to combine the output of two line level audio sources to be fed to one input.  A standard way in professional audio is to use a mixing desk, but on home audio system you might want to look for a simpler and less expensive alternative.  Some people have suggested of combining two audio outputs with an "Y-adapter" which is ment to split one output.  Those adapters are just one male connector and two feamle connector directly wired to each other in the followin way: __ Designed by Tomi Engdahl

3 Line Inputs, 6 Input Mixer 3 Mic inputs -  The mixer circuit below has 3 line inputs and 3 mic inputs.  The mic inputs are suitable for low impedance 200-1000R dynamic microphones.  An ECM or condenser mic can also be used, but must have bias applied via a series resistor.  As with any mixer circuit, a slight loss is always introduced.  The final summing amplifier has a gain of 2 or 6dB to overcome this.  The Input line level should be around 200mV RMS   (__ Designed by Andy Collison

3 Line Mixer -  This project is a 3 or more lines mixer.  For more than 3 inputs you can repeat the input parts    (P=10K R=22K).  It powered with 9Vdc. 

Amplifier Bridging -  A design for a simple add-on bridging adapter for stereo power amplifiers __ Designed by Rod Elliott  ESP

Audio mixer (ASCII) -  ASCII drawing __ Designed by John Lundgren

Audio Mixer based JFET 2N3819 -  This is the audio mixer circuit based Junction FET   (JFET) of 2N3819. __ Designed by Aaron Cake

Audio Mixer with Multiple Controls -  When recording sound from several orchestral instruments being played by different musicians using a single microphone, the only way to adjust the sound balance is to change the position of the __ Electronics Projects for You

Audio Signal Source -  This is a lovely project for home constructors keen on building their own test and measurement   (T&M) equipment.  It makes use of the ICL8038 signal generator chip, manufactured by Intersil.  An improved version, made by Exar corp.  is available   (XR8038A). 

Audio Voice-Over -  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. __ Designed by Andy Collinson

Bipolar transistor mixer -  Ham RadioV-U)HF AMPLIFIERSchematic __ Designed by Guy Roels ON6MU

Circuit Incorporates Mixing andAmplifying Functions -  10-Jul-08 EDN-Design Ideas Using an amplifier with a power-down disable, you can combine the mixer and the amplifier functions__ Circuit Design by Guus Colman, Guy Torfs, Johan Bauwelinck, and Jan Vandewege, INTEC/IMEC, Ghent University, Ghent, Belgium

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 __ Designed by Tomi Engdahl

FET audio mixer -  This simple circuit mixes two or more channels into one channel   (eg.  stereo into mono).  The circuit can mix as many or as few channels as you like and consumes very little power.  The mixer is shown with two inputs, but you can add as many as you want by just duplicating the "sections" which are clearly visible on the schematic. __ Designed by Aaron Cake

High Quality Sound Mixer -  This project is probably the most ambitious so far, and can be expected to be very expensive.  On the positive side, it is also capable of excellent performance, and can be tailored to suit your exact specifications.  There are several different input modules in the series, the first being the microphone and line input.   The project is presented in parts, and Part 1 shows the mic/line module and has some background information on noise measurements and the general philosophy behind the project. __ Designed by Rod Elliott  ESP

Line 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 __ Designed by Tomi Engdahl

Low Cost Mixer -  A simple mixer circuit suitable for mixing microphones or effects outputs.  The overall gain from input to output is one if the pot related towards the input is full up.  You'll be able to generate this a net gain of ten (or any other reasonable gain) by lowering the input resistor towards the second op amp.10K in this position provides a gain of 10db, or 20db.

Low-Cost Incorporates Mixing & Amplifying Functions -  10-Jul-08 EDN-Design Ideas Using an amplifier with a power-down disable, you can combine the mixer and the amplifier functions__ Circuit Design by  Guus Colman, Guy Torfs, Johan Bauwelinck, and Jan Vandewege, INTEC/IMEC, Ghent University, Ghent, Belgium

Mic Audio Mixer -  The following design is the circuit diagram of microphone audio mixer with 3 input channels.  It use 741 op-amp to amplify the input signal.  This circuit can be used for dynamic microphone. __ Designed by Aaron Cake

Microphone Mixer -  Designed for 3-dynamic microphonesThis relatively simple mixer was designed for three dynamic microphones, but can be re-designed for more or less.  Level and tone controls are available to tailor the sound to your needs. __ Designed by Aaron Cake

Mini Audio Mixer -  This is simple mini audio mixer.  This circuit consume low current due to the simple design.  Also featuring three inputs with switchable high/low sensitivity and unusual level-control circuits, providing high overload margins and low-noise figures, proportional to gain-level settings.

Portable Mixer -  The target of this project was the design of a small portable mixer supplied by a 9V PP3 battery, keeping high quality performance.  The mixer is formed assembling three main modules __ Contact: Flavio Dellepiane, fladello @ tin.it

Simple Circuit Line 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 __ Designed by Tomi Engdahl

Simple Circuit Mixer 3 Input -  This is the very simple 3 input mixer for your audio system.  You can add the number of input by adding some components for mixer input (P=10K R=22K).  This circuit is only recommend for low and intermediate audio sound system.  You need better mixer circuit for your high class audio system.

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 __ Designed by Tomi Engdahl

Simple Circuit Two-Line Output Combiner -  Sometimes there is need to combine the output of two line level audio sources to be fed to one input.  A standard way in professional audio is to use a mixing desk, but on home audio system you might want to look for a simpler and less expensive alternative.  Some people have suggested of combining two audio outputs with an "Y-adapter" which is ment to split one output.  Those adapters are just one male connector and two feamle connector directly wired to each other in the followin way: __ Designed by Tomi Engdahl

Six Channel Mixer & Amplifier -  One of my most ambitious projects, this mixer was made for my friends Tony and Wilfred of Mixed Fruit Jam as a practice amp.  It's a relatively straightforward design, and will probably not be the best way of doing this.  However, it works fairly well, and is relatively inexpensive to build. __ Designed by Tony and Wilfred of Mixed Fruit Jam

Stage & Recording Mixer -  This project is probably the most ambitious so far, and can be expected to be very expensive.  On the positive side, it is also capable of excellent performance, and can be tailored to suit your exact specifications.  There are several different input modules in the series, the first being the microphone and line input.   The project is presented in parts, and Part 1 shows the mic/line module and has some background information on noise measurements and the general philosophy behind the project. __ Designed by Rod Elliott  ESP

Telephone Test with 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. __ Designed by Tomi Engdahl

Three Channel Audio Mixer -  Above schematic is for a three channel audio mixer.  That will provide an overall gain of one between the output and each input channel.  Each input channel includes a single 0.1uf capacitor and 100-Kilohms resistor to provide an output impedance of 100K. __ Designed by YMYA electronics-IZHAR FAREED

Two Line Output Combiner -  Sometimes there is need to combine the output of two line level audio sources to be fed to one input.  A standard way in professional audio is to use a mixing desk, but on home audio system you might want to look for a simpler and less expensive alternative.  Some people have suggested of combining two audio outputs with an "Y-adapter" which is ment to split one output.  Those adapters are just one male connector and two feamle connector directly wired to each other in the followin way: __ Designed by Tomi Engdahl

Voice-Over -  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. __ Designed by Andy Collison

Voltage Controlled Mixer with Modulator -  Schematic only, no circuit description __ Designed by John Simonton

Why do we need Mixer? -  Article:  The mixing of a number of audio signals is such a common thing to do that one would expect the Net to be riddled with articles on how and why signals are mixed.  There are plenty of circuits that show how it can be done, but very little that explains the benefits or drawbacks of any particular scheme. __ Designed by Rod Elliott  ESP


Audio Circuits:  Mixers Circuits

 


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