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Archives for May, 2011

Voltage Reg

Voltage Reg Power Supplies Power Supply Circuit using 2N3055

Audio Volume Controls

Audio Volume Controls AutoMatic Volume Control Circuits using TL082 IC Audio Amplifier Design News

Good Site to find Circuit Board Schematics or Pin-Out diagrams for IC chips?

Seraph asked: Is there a place on line where you can go to find circuit board schematics for things, like a database or something. There have been many times when I take apart something, like a TV for example, and cant find where the power inputs go to replace a pulled out wire. I know […]

Subwoofer speakers

Subwoofer speakers 300W Subwoofer Power Amplifier 300W Subwoofer speakers

High voltage op amp

high voltage op amp using UA741 The op-amp UA741 is wired to operate in three frequency ranges- high, medium and low. The circuit is designed such that the circuit produces +/-20 dB boost or attenuation for 50Hz,1KHz and 10Khz by varying POT’s R2. The maximum amplification for any of these bands at maximum supply voltage […]

Circuit Guitar Tabs

Amplifier parts: R1–6K8 1W Resistor R2,R4_____________470R 1/4W Resistors R3__________________2K 1/2W Trimmer Cermet R5,R6_______________4K7 1/2W Resistors R7________________220R 1/2W Resistor R8__________________2K2 1/2W Resistor R9_________________50K 1/2W Trimmer Cermet R10________________68K 1/4W Resistor R11,R12______________R47 4W Wirewound Resistors C1,C2,C4,C5________47΅F 63V Electrolytic Capacitors C3________________100΅F 25V Electrolytic Capacitor C6_________________33pF 63V Ceramic Capacitor C7_______________1000΅F 50V Electrolytic Capacitor C8_______________2200΅F 63V Electrolytic Capacitor (See Notes) D1_________________LED […]

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