The LM386 is a low-voltage audio power amplifier designed by National Semiconductor , which is now part of Texas Instruments . Introduced in 1983, it has been widely used in various audio applications, such as amplifying signals in small radios, portable speakers, and other low-power audio equipment. This compact device integrates all the essential components of a basic audio amplifier circuit, including an internal biasing network, an input stage, and an output driver. It operates within a supply voltage range of 4V to 12V, making it ideal for driving small speakers while consuming minimal power. A standout feature of the LM386 is its adjustable gain, which can be varied between 20 (26dB) and 200 (46dB) using external components. Assembled LM386 power amplifier. Although modern Class-D amplifiers offer higher efficiency and greater power output, the LM386 remains a viable solution in certain applications due to its straightforward design, low cost, ease of assembly (thanks to i...
This blog contains electronic, amateur radio, and embedded system projects, which I did during my free time. Unless otherwise noted, all the articles and projects described on this blog are based on my original designs.