Tag Archives: audio mixer

4 Channel Portable Audio Mixer

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High-quality modular design, 9V Battery powered – Very low current drawing 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 that can be varied in number and/or disposition… Read more »

Three Channel Audio Mixer Circuit

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Small portable device – 9V battery operation Three high/low-sensitivity switchable inputs Although the modular Portable Mixer design available on these web pages has become a hit for many amateurs, some correspondents required a much simpler device, mainly for mixing mono signals. This design should fulfil their needs, featuring three inputs… Read more »

Audio Mixer with SSM2024

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This audio mixer circuit schematic we propose here is built around four amplifiers, which are current controlled, all of them incorporated in IC SSM2024, produced by Precision Monolithics Inc. (PMI). To obtain a small offset and a high rejection, the four mixer entries must have a 200 Ω impedance. Those… Read more »

Audio Mixer with one transistor

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This one transistor audio mixer is used in an amplifier circuit design with base driven transistor and with its emitter being current controlled, most of the driving current flows through the collector away. Using the values in the audio mixer circuit shown in the diagram, the collector current will be… Read more »

Simple mixer circuit – Common base

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The simple mixer schematic is built on common base principle, where input voltages are transformed in alternative currents wich are summed to form the alternative current component for the collector. The total amplification is R6 / Ri, where Ri is one of the input resistors. I’ve build this mixer for… Read more »

Multi-channel audio mixer circuit using LM3900

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LM3900 multi-channel audio mixer. A simple multi-channel audio mixer circuit using LM3900 quad amplifier is given below. The circuit consists of 4 channel quad amplifier (LM3900). Two mic audio inputs and two direct line inputs are available in this circuit. By adding the same circuit parallel with this, you can… Read more »

Simple 3 Channels Mini Mixer

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Simple and cheap mixer circuit. This circuit supplied using 9V power supply. There is high/low-sensitivity switchable inputs for each input channel. Component part list: P1,P2,P3_________5K Linear Potentiometers R1,R11,R15_____180K 1/4W Resistors R2,R12,R16_______2M2 1/4W Resistors R3,R13,R17_____750R 1/4W Resistors (See Notes) R4,R14,R18_______1K 1/4W Resistors R5______________15K 1/4W Resistor R6_____________220R 1/4W Resistor R7_______________1K5 1/4W Resistor… Read more »

Audio Mixer + VU Meter

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This is audio mixer circuit. The circuit is for one channel input, if you need, for example 5 channel mixer, then you need to build 5 similar circuits. Schematic diagram: Component part list: TR1,2 = FCS9015 ; TR3 = C1213 ; IC1,2 = 741 or TL071 The kit of this… Read more »