![]() ![]() The pin-outs and principles remain the same. Most other variants can only be sourced through trade suppliers. While there are several variants of the LM386, we’re going to describe the LM386N-1, the most commonly retailed version. This avoids the bulk, weight, and power supply considerations of a larger amplifier that would simply be impractical and largely redundant for many projects. All that is left is a minimum of external components required for the user to have control over some functions. It runs from a single-rail power supply and contains many of the components and circuits needed to drive a speaker or headphones to a reasonable volume. ![]() THE LM386Īn amplifier integrated circuit (IC) is the answer, and the LM386 is one that is commonly available. ![]() Both will drive a small speaker, but with minimal volume. This is particularly true of Arduino and Raspberry Pi boards. Yet many projects we make require some form of increase in audio power from the small signals generated by the circuits. However, in many cases for the maker, these are overkill and somewhat impractical. When many of us think of amplifiers, we think of home theatre systems, music to wake the neighbours, or a concert. This time, however, we’re going to look at the IC itself, and some of the things you need to think about if you’re going to design it into your own projects. ![]() We’ve used the LM386 before in DIYODE projects. We show you how to make a small amplifier using this versatile component. ![]()
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