Question

A company is required to design a DC power supply to power 3 different circuits. The...

A company is required to design a DC power supply to power 3 different circuits. The requirements for the circuits are as below:

Circuit 1: Supply Voltage 5 Volt Circuit

2: Supply Voltage 9 Volt Circuit

3: Supply Voltage 3 Volt

The parts available in that company are a 20V power supply unit and 4 Variable resistors (1 to 100Ω) for this design. You as a design engineer are required to help the company to design the power supply as per the requirements by using voltage divider technique. Your design should consider the power losses and justify your design.

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Answer #1

As per the question, we need to design a DC power supply to power 3 different circuits.
1.   Supply voltage = 5V
2.   Supply voltage = 9V
3.   Supply voltage = 3V
Components available
1.   Power supply = 20V
2.   Resistors from 1 to 100 ohm.
The corresponding circuit is shown below

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