![]() ![]() However, a less complex and more efficient solution to hearing audio signals is to use a LM386 power amplifier IC. There are a variety of audio amplifier circuits available for this application.Īn audio amplifier can be built using several discrete transistors cascaded to increase the amplification gain of the circuit to hear the Pi Zero WHâÂÂs computer-generated tones. In order to hear Pi ZeroâÂÂs audible tones, you need an audio amplifier.
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