The simple TV signal generator

Published:2011/6/17 22:35:00 Author:Borg | Keyword: signal generator | From:SeekIC

This generator can test if the TV receptor is good in 5 meters. See as the figure, the circuit is mainly a VFH oscillator, which consists of the triode BFI948 and the external components. The circuit can generate black-white stripe images on the TV screen and output an audio signal in the loudspeaker. The circuit only needs a 3V battery. In the circuit, both L1 and L2 use No.21 SWG high-intensity enameled wires to wind 8 turns around the hollow frame whose diameter is 5mm, by changing the value of the 4.7μF capacitor and the turns of L1 and L2, the number of the stripes and the sound frequency can be changed.



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