LM381 4 channel audio mixer circuit design
The LM381 audio mixer circuit is designed to combine audio signals from four separate channels into a single output. This circuit employs the LM381 integrated circuit, which is a low-noise audio amplifier well-suited for mixing applications. The design utilizes standard electronic components, making it accessible for hobbyists and engineers alike.
The circuit typically consists of four input stages, each connected to a potentiometer that allows for individual volume control of each channel. The output of these potentiometers feeds into the LM381, where the signals are mixed. Additional components such as resistors and capacitors are used to stabilize the circuit and filter out any unwanted noise, ensuring a clean audio output.
Power supply considerations are crucial, as the LM381 requires a dual power supply for optimal performance. The circuit should be powered using a symmetric voltage source, commonly ±15V, to ensure that the amplifier operates within its specified range.
The final output stage may include a coupling capacitor to block any DC offset, allowing only the AC audio signal to pass through to the output. This ensures compatibility with downstream audio equipment, such as amplifiers or recording devices.
Overall, the LM381 4-channel audio mixer circuit is a practical project that demonstrates the principles of audio mixing and amplification, providing a valuable learning experience in electronic design and audio engineering.LM381 4 channel audio mixer circuit design project using few common electronic parts 🔗 External reference
Related Circuits
Adjusting the phase potentiometer RP can change the conduction angle of each corresponding thyristor (V1-V). This adjustment alters the voltage applied across the load. The circuit utilizes a phase control technique to manage the power delivered to a load by...
The total electric current drawn by the circuit should be measured by connecting the probes of a multimeter across the positive output of the power supply and the positive rail input of the amplifier. The expected current value is...
Since then, NL has evolved into the Microsoft Windows®-based NL4, which has been extensively used by world-class engineers in various fields of electronics for almost 10 years. NL5 is the first version to be publicly available. Unlike conventional SPICE-based...
This simple circuit can be used to protect a bike from theft. It produces a loud alarm tone if someone attempts to start the bike. The alarm can only be disabled when the hidden switch S2 is opened. The...
Undervoltage release operates over an extended period. When the power supply voltage drops within the operating voltage range, it triggers the release mechanism, resulting in the rotation of the tripping axle and the disconnection of the circuit breaker. There...
This is a simple triangle-wave generator utilizing two integrated circuit (IC) devices and a transistor. The triangle wave serves as feedback to the square-wave generator. It allows range switching across three intervals from 100 Hz to 100 kHz. Additional...