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Archives for April, 2010

Stereo Audio Preamp schematic

Stereo Audio Preamp schematic using KA1222 Stereo Audio Preamp schematic using KA1222

Dual Low Noise Equalizer Amplifier circuit

Dual Low Noise Equalizer Amplifier circuit using KA1222 Dual Low Noise Equalizer Amplifier circuit using KA1222

How to a solar cell

How to a solar cell Solar cell / photovoltaic cells, is a semiconductor device consisting of a pn junction diode, where, in the presence of sunlight to create electrical energy, because it has the function of the tool can convert sunlight directly into electricity. Solar cells / photovoltaic cells made in 1839 by Edmund Becquerel, […]

Best Audio Op-Amps Circuit

Best Audio Op-Amps Circuit using LF353 or TL072

Temperature alarm circuit

Temperature alarm circuit using LM7215, ZVN4106F Temperature alarm circuit using LM7215, ZVN4106F

Earphone portable Circuit

Earphone portable Circuit using 1 transistor HEP 230 Portable 3v Headphone Amplifier

Simple and Sensitive audio detector

Simple and Sensitive audio detector using C828, FCS9013 This bat detector circuit to have better sensitivity and Simple and Sensitive audio detector using C828, FCS9013 Audio frequency signals frequencies below and above the audio range, respectively

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