voice command using PIC 16f877A

voice command using  PIC 16f877A  using PIC 16f877

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Interfacing 7 Segment Display ccs and 16f877a

OBJECTIVE:

• • 7seg display
  • common anode
  • common cathode
  • Interception

COMPONENTS:

• 1 7seg display common anode
• 1 7seg display common cathode
• 2 cap 22p
• 1 quartz
• 2 button
• 2 resistance 220 hom
• 
  

Discription:

1.The Common Cathode (CC) – In the common cathode display, all the cathode connections of the LED segments are joined together to logic “0” or ground. The individual segments are illuminated by application of a “HIGH”, or logic “1” signal via a current limiting resistor to forward bias the individual Anode terminals (a-g).

2. The Common Anode (CA) – In the common anode display, all the anode connections of the LED segments are joined together to logic “1”. The individual segments are illuminated by applying a ground, logic “0” or “LOW” signal via a suitable current limiting resistor to the Cathode of the particular segment (a-g).

Segment Display Segments for all Numbers.

7-segment Display Truth Table

CIRCUIT DIAGRAM:

CODE in this Video ;

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