![One Transistor Audio Mixer Circuit Diagram](https://tronicspro.com/wp-content/uploads/2023/05/One-Transistor-Audio-Mixer-Circuit-Diagram-300x191.jpg)
The one-transistor audio mixer circuit using a BC109 transistor is a simple and effective design that can be used for small-scale audio mixing applications. It requires only a few components and is easy to build, making it a great option for hobbyists, students, and DIY enthusiasts.