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stereo tone control circuit

stereo tone control circuit using A726 and C1313

Equalizer Circuit Using LA3600

Equalizer Circuit Using LA3600 Stereo 10-band graphic equalizer circuit R101                      4K7 R2                           560 R3                            1K C101,201,114,214                       3,3uF/16V C102,202                                       22uF/16V C103,203                                       100nF C104,204               […]

TV transmitter VHF Bands I, II, or band III

This TV transmitter will handle frequencies up to about 250MHz, so it will work perfectly if you have on your telly. In principle, the transmitter should work up to 500MHz or more, using the BF959 bipolar transistor. You should be able to generate a signal on UHF channel 21, but I have not (yet) tried […]

Making a joule thief

Making a joule thief How to make a joule thief charger ? This is a very interesting circuit, it will drive 6 volt led from a single 1.5 volt cell. How to make a simple joule thief – Here are the schematic diagrams that are involved with the joule thief circuit A joule thief is […]

Transmitter circuit schematic with MC2833 delivers up to 3W

Transmitter circuit schematic with MC2833 delivers up to 3W It is capable of operation over about 29 to 32 MHz with the components shown. A 27MHz NBFM transmitter circuit schematic with MC2833 and 2 FEET transistors MPF6660. Using a Motorola MC2833 one-chip FM transmitter, a few support components and am MPF6660 RF amp, this transmitter […]

qpsk modulator circuit

qpsk modulator circuit QPSK Demodulation and Audio Signal-Processing IC for Satellite Broadcast Reception using LC7851E Overview The LC7851E demodulates the QPSK (quadrature phase shift keying) modulated audio data broadcast by the Japanese BS and CS broadcast satellites and converts that data to an analog audio signal. This IC integrates on a single chip the audio […]

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