4.2. 79XX Series

Try these first

1. 1.

   What is the purpose of a voltage regulator?

   Hint

   Think about its role in electronic circuits.

2. 2.

   Name one output of the 79XX series.

   Hint

   They are both negative voltage outputs.

3. 3.

   What output voltage does the 7905 give?

   • 0V
   • -5V
   • 5V

   Hint

   Focus on the code numbers.

4. 4.

   True or False: The 7912 outputs a positive voltage.

   • True
   • False

   Hint

   Recall the series designation.

5. 5.

   Design a power supply circuit using both the 7905 and 7912. Describe how each regulator will contribute to the overall circuit functionality.

   Hint

   Think about how each regulator supports different parts of an embedded system.

6. 6.

   Explain the significance of using a voltage regulator in an operational amplifier circuit. What could happen if the voltage is not regulated?

   Hint

   Consider the stability requirements for sensitive electronic components.