Fixed Voltage Regulator

Background information

Experimental Tasks

Through the use of a fixed voltage regulator, a regulated DC voltage of 5 V shall now be generated.

1. Draw the corresponding circuit with transformer, bridge rectifier, capacitor, fixed voltage regulator 7805 and resistor into figure 2.
2. Complete the existing circuit with the 7805 voltage regulator and simultaneously record the voltage at the input and output of the fixed voltage regulator with the oscilloscope into the screen image shown below.
   
   
   Fig. 2

Fig. 3 Channel 1: $ \frac{V}{\rm DIV} = $

Channel 2: $ \frac{V}{\rm DIV} = $

Time basis: $ \frac{T}{\rm DIV} = $

1. Determine the required values from table 1 using the oscilloscope at the output of the fixed voltage regulator:
   
   

   Tab. 1: Fixed voltage regulator value table

   
   Comparison of the circuits from table ## and table ##:
   

2. Now compare the measured values of the half-wave rectifier circuit with the values of the bridge circuit and document your findings in a few short sentences (advantages, disadvantages).
   
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3. Comparison of the circuits from table ## and table 1:
   
4. What additional advantage does the fixed voltage regulator provide with regard to the peak-to-peak value of the ripple voltage and the ripple frequency?
   
   

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Test questions - Fixed Voltage Regulator