attached is questions on timers and voltage regulators. Was looking to check my answers against what you got. Thanks for the help in advance.

 

ET1410: Module 5 Timers and Voltage RegulatorsExercise 5.1Timers and Voltage Regulators1Answer the following questions:1.For the oscillator in Figure 1:a.Determine the oscillation frequency of the 555 astable oscillator.b.To what value must Cextbe changed to achieve a frequency of 25 kHz?Figure 12.A 555 timer connected in the monostable configuration has a 56kΩ external resistor and a0.22μF external capacitor. What is the pulse width of the output?3.The output pulse width of a certain 555 one-shot is 12ms. IfCext=2.2ΩF, what isRext?4.The nominal output voltage of a certain regulator is 8 V. The output changes by 2 mV when theinput voltage reduces from 12 V to 18 V. Complete the following:a.Determine the line regulation and express it as a percentage change.b.Express the line regulation in %/V.

Attachments:

• 1496735357-m5_exercise.pdf