TV Video Circuits

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Inverters form three-phase VCO
Logic Probe with 74LS47
Audio isolation transformer
Bipolar dc-dc converter requires no inductor
Precision time-countdown timer
Light-Wave Voice-Communication Transmitter Circuit
wien bridge sine wave oscillator circuit using lm107
oscillator HEF4060B counter doesnt count
Three Hour Timer
Electronic Tachometer
1W BTL Audio Amplifier
External protection signal generator by a circuit diagram TDA4866
Control cables plus anti-interference capacitors
Electric sewing machine saving circuit



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