Table of Contents
Microphone head and audio mixer circuit with volume. Simply use operational amplifiers to mix the sound of the microphone head with the input audio, low cost, simple and practical. The hardware can be viewed in the engineering schematic, which has been detailed and annotated.
About audio + microphone mixer
An audio + microphone mixer is an essential tool for anyone working in the field of sound production or live performance. This device allows users to blend multiple audio sources, such as instruments, microphones, and playback devices, into a single output signal. By adjusting the levels and tones of each input, the mixer enables users to achieve a balanced and harmonious sound. Additionally, many mixers offer features such as equalization, effects processing, and routing capabilities, allowing for further customization and control over the audio signal. Overall, an audio + microphone mixer is a versatile and powerful tool that is indispensable for achieving high-quality sound in a variety of settings.
Schematic Circuit audio mixer Microphone + line in NE5532
Microphone head section:
Mixer
Power Supply
About IC NE5532
The IC NE5532 is a dual operational amplifier that is widely used in audio applications due to its low noise, high slew rate, and wide bandwidth. It has a high output current capability, making it suitable for driving headphones and speakers. The NE5532 is known for its excellent audio performance, with low distortion and high signal-to-noise ratio. It is commonly used in audio mixers, preamplifiers, equalizers, and other audio equipment where high-quality sound reproduction is important. Its versatile design and reliable performance make it a popular choice among audio engineers and enthusiasts.
BOM Circuit audio mixer Microphone + line in
| Parts | Value | Description | Quantity |
| Capacitors | |||
| C1,C2,C5,C8,C10,C11,C12 | 4.7uF | C0603 – SMD ceramic capacitor | 7 |
| C3 | 330nF | C0603- SMD ceramic capacitor | 1 |
| C4,C6,C9,C16 | 100pF | C0603 – SMD ceramic capacitor | 4 |
| C13,C14 | 10uF | 10uF 25V CASE-B-3528 Tantalum Capacitor | 2 |
| C15 | 100nF | C0603 – SMD ceramic capacitor | 1 |
| Resistors | |||
| R1 | 470 | R0603 – SMD resistor | 1 |
| R2,R15 | 20K | R0603 – SMD resistor | 2 |
| R3 | 2.2K | R0603 – SMD resistor | 1 |
| R4,R9,R16 | 180K | R0603 – SMD resistor | 3 |
| R5,R17 | 200K | R0603 – SMD resistor | 2 |
| R7,R8,R10,R11,R12,R14 | 10K | R0603 – SMD resistor | 6 |
| Semiconductors | |||
| U1 | NE5532DR | Dual 10MHz SOIC-8 Operational Amplifier | 1 |
| Miscellaneous | |||
| CN1,CN2 | PJ3F07-5P | 3.5 mm headphone jack | 2 |
| H1,H2,H3,H4 | PZ254V-11-02P | HDR-TH_2P-P2.54-V-M | 4 |
| R6,R13 | 10 kΩ (103) | Potentiometer | 2 |
| SCREW1 | M3 screw | M3 screw | 1 |
Download files, links, and notes
Source: https://oshwhub.com/zengxianhui/mic-yun-fang
