8.4.2.1. Common Cathode

Try these first

1. 1.

   What is a common cathode display?

   Hint

   Think about what happens when you connect all negatives together.

2. 2.

   Why do we use multiplexing with displays?

   Hint

   Consider how quickly we can switch between several things.

3. 3.

   What segments are illuminated to display the number '4' on a common cathode display?

   • A
   • C
   • D
   • F
   • B
   • C
   • D
   • E
   • G
   • C
   • D
   • E
   • F

   Hint

   Think about which segments create the shape of '4'.

4. 4.

   True or False: A common cathode display requires all anodes to be grounded to light an individual segment.

   • True
   • False

   Hint

   Remember how power is supplied to the segments.

5. 5.

   Design a scenario where using common cathode displays would be more beneficial than common anode displays. Consider factors like power consumption and control complexity.

   Hint

   Think about ease of use in different projects.

6. 6.

   Create a table comparing the control signals required for common anode vs. common cathode displays in terms of ease of use and complexity.

   Hint

   Consider programming and number of connections needed.