Reference no: EM131221563
Lab Exercise: Electronics Principles
Zener Regulators
In this lab you will construct a regulated DC power supply. You will observe the behavior of the circuit as a function of load current.
Equipment
1. Transformer
2. Oscilloscope
Materials
1. (4) 1N4002 Diodes
2. 10 μF Capacitor
3. 1N5230 Diode (Zener)
4. (2) 1 kΩ Resistor
5. (1) 680 Ω Resistor
Procedure
1. Open Multisim (draw the circuits) and Benchvue (take the screenshots)
2. Measure all (3) resistor values and record them.
R1 = RL1 = RL2 =
3. Configure the circuit in Figure 3-1 above.
4. Measure the secondary voltage. Record the rms or peak voltage. Vsec =
5. Determine the turns ratio of the transformer. n =
6. Use the oscilloscope to measure the max and min of the ripple voltage (Point A) of the filter (Channel 1) and the max and min output voltage (Point B)(Channel 2). Take a screenshot and save.
7. Calculate the peak currents, IR1, IL, and IZ. [Hint: Start with ????1 = ????(????) / (??1+??L)]
8. Replace RL with the 680 Ω resistor and repeat steps 5 and 6.
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