4.3. Applications

Try these first

1. 1.

   What series of IC voltage regulators is used for positive voltage?

   Hint

   Think of the numbers; ones that start with 7 are likely the answer.

2. 2.

   Why is it important to have a stable voltage supply in circuits?

   Hint

   What happens to sensitive electronics under variable conditions?

3. 3.

   What do the 78XX and 79XX series of IC voltage regulators provide?

   • Positive and negative voltages
   • Only positive voltages
   • Only negative voltages

   Hint

   Remember the number designations for each series.

4. 4.

   True or False: IC voltage regulators can only operate at a fixed input voltage.

   • True
   • False

   Hint

   What is their primary function?

5. 5.

   Design a simple power supply circuit using a 7805 voltage regulator. What components would you need, and how would you connect them?

   Hint

   Think about the steps to convert AC to usable DC before regulation.

6. 6.

   Explain the implications of not using a voltage regulator in a sensitive analog circuit.

   Hint

   Consider the importance of voltage stability for signal integrity.