Tsukure Studio 3-Channel Mono Audio Mixer

An Audio Mixer is an essential device in Audio Electronics. The mixer mixes two or more audio signals into a one (Mono) or two output (Stereo). The audio mixer uses audio mixing process where multiple sounds are combined to form a single or multi-sound. It is a widely used process in Live concerts, televisions, films, music industries etc.

In this project, we will make Audio mixer using a single transistor which will combine two or more audio signals and produce a combined audio output. In this circuit, two audio inputs will be mixed using a single transistor to produce a mixed audio output.

Here PN2222A transistor is used. Different transistor with the same ratings can also be used with this circuit like 2N3904.

PN2222A is an NPN Silicon transistor, widely used in general purpose electronics. This transistor has 500mA of collector current and can be used for medium power amplification purposes. The case style available is TO-9.

In this Audio Mixer circuit, transistor 2N2222A is the heart of the circuit. The emitter is connected with GND and the collector is connected with a 3.9k resistor. The output is provided across a .22uF capacitor. The other components are connected across the base of the transistor. Inputs are provided through .1uF capacitor and 4.7k resistors. We are powering the circuit using a 12V DC power supply unit.


Components used in this module...

Find out more about the components used in this STEM Module.

Let's Get Started!

Below you will find a list of bits to gather before hand, followed by a detailed schematic. Using a breadboard lay out the components and connect them together as shown. Alternatively you can purchase this module from our shop and simply solder the components in the places indicated on the quality assured printed circuit boards provided.

What You Need...

3 104 (100nF / 0.1uF) Capacitor (Ceramic)
1 224 (220nF / 0.22uF) Capacitor (Ceramic)
1 471 (470pF / 0.47nF) Capacitor (Ceramic)
1 100uF Capacitor (Polarized)
1 2M2
[ Red, Red, Black, Yellow ]
Resistor (0.25 Watt)
1 3K9
[ Orange, White, Black, Brown ]
Resistor (0.25 Watt)
1 560R Resistor (0.25 Watt)
3 5K (Sliding) Resistor (Potentiometer / Variable)
1 On/Off Rocker Switch (3A/250V) - Small Rectangle Switch
1 2N2222 Transistor (NPN)

NB: Any resistor colour codes specified relate to 5 band resistor codes, the 5th band has not been shown intentionally. The 5th band indicates the resistor tolerence, we use only the highest tolerence resistors in our products.

Take a Closer Look!

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Just An Idea!

This project is currently just an idea, a prototype! This is how we begin our journey of discovery and welcome you to join us.

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