Here is a compact stereo Bluetooth speaker circuit design based on AC695678N Bluetooth audio SoC and the PAM8403 Class-D stereo audio amplifier. The circuit receives audio wirelessly from a smartphone or laptop, processes the audio inside the Bluetooth IC, amplifies the audio signal using the PAM8403 amplifier, and finally drives stereo speakers. The circuit is […]
Most electronic circuits, including microcontrollers, digital ICs, and operational amplifiers, require a stable 5V power supply. In this article, we will discuss how to build a simple yet reliable 5V power supply circuit using the LM7805 voltage regulator. This circuit is widely used in embedded systems, robotics, and general-purpose electronics due to its simplicity and […]