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TTL_OSCILLATOR_INTERFACES_DATA_FOR_DISPLAY_BY_A_TELEVISION_S

2016-08-14 15:54  
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TTL_OSCILLATOR_INTERFACES_DATA_FOR_DISPLAY_BY_A_TELEVISION_SET
Three gates of a 74LS04 form the oscillator circuit. Capacitor C1 allows fine-frequency adjustment to a specific television channel and helps stabilize the circuit. Potentiometer R1 acts as the mixing input and provides adjustment of the contrast ratio for the best viewing. A fourth gate buffers and helps stabilize the oscillator.