Depends what you mean by sensitive. Are you trying to detect an IR beam in daylight/roomlight? or under totally dark conditions?
Without an IR optical filter, or modulation, or both, it won't be able to distinguish between daylight and IR light, hence the perceived
insensitivity.
no no sir that im trying to increase for IR devices , actually i was talkin about 555 clap switch only,it was totally failed
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sir sir sir its very urgent thing here , i want to increase the sensitivity of the mic circuit only here . tell me how ?**broken link removed**\[\psi\]