Circuit Of Electronic Megaphone

Published:2011/4/21 2:39:00 Author:TaoXi | Keyword: Electronic Megaphone | From:SeekIC

The circuit of electronic megaphone is as shown, it composed of three parts: voice recording, audio power amplifier and power supply. The ICl is the fool type of voice recording IC (PT-8815／20／30), it has the function of 30 seconds voice recording and 30 seconds playback; IC2 is the integrated power amplifier (LM386) and used to amplify the output voice signal of ICl, and IC2helps the speaker to get enough power to send out the voice; IC3 uses the 7805-type three-terminal integrated voltage stabilizer.



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