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
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 |