Circuit Project Electronic

Sound Meter easy testing by IC LM324

The circuit below responds to sound pressure levels from about 60 to 70 dB. The sound is picked up by an 8 ohm speaker, amplified by a transistor stage and one LM324 op-amp section. ………..

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This entry was posted on Sunday, August 17th, 2008 at 10:51 am and is filed under alarm, audio, meter. You can feed this entry. Responses are currently closed, but you can trackback from your own site.

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