Video Line Bar Generator Circuit

  
A 555 and a dual 556 timer generate a rudimentary video signal, as shown in the schematic. The first timer generates 4.7-8 synch pulses operating in the astable mode with a 64-8 period. The second timer generates a delay pulse, which triggers the third timer to generate a bar,
Video Line Bar Generator Circuit - schematic

The second timer sets the bar position and the third sets the bar width.




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