Electronic devices yell LM386 PT-8830

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Electronic circuit shown in Figure crying, which consists of voice recording, audio power amplifier and power supply circuit composed of three parts. Wherein ICl to fool type o

f voice recording IC PT-8815/20/30, it can be 30 seconds voice recording and playback; IC2 for the integrated power amplifier LM386, ICl output for amplifying a voice signal to the speaker to get enough power and loud voice; IC3 use 7805 type fixed three-terminal integrated voltage regulator.

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