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Archives for June, 2010

Audio Filter Circuit without voltage

Audio Filter Circuit without voltage Audio Filter Circuit without voltage

Control input lines On off Switching circuit diagram

Control input lines On off Switching circuit diagram using 4011, 4518, 4066, BAT42, VNB8AF

40 – 0 – 40 5A transformer Circuit diagram

40 – 0 – 40 5A transformer Circuit diagram The power supply should be capable of supplying the maximum current required with good stabilization. I used commercially available 40 – 0 – 40 5A transformer. The transformer have 6V, 9V, 12V and 22V windings also. The transformer cost me around Rs: 370. Power supply provides […]

Energy Meter circuit

Energy Meter circuit using ADE7756AN, PIC6F62BA, LM2940CT-5, 1N4004, STP30NE06L

Preamp mic schematic and Audio Megaphone

Preamp mic schematic and Audio Megaphone using BC547, TDA7052 P1_____________22K R1_____________22K R2,R3_________ 100K R4_____________47K R5______________2K2 R6______________6K8 R7_____________22K R8______________2K7 C1,C6_________ 100nF  63V C2,C3__________10µF  63V C4_____________22µF  25V C5_____________22nF  63V C7____________ 470µF  25V Q1_ BC547 IC1 TDA7052 SW1____________SPST MIC____________electret microphone SPKR___________8 Ohm Loudspeaker

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