Design a Circuit to Ensure that Two LEDs in the Following Specifications: Electrical & Electronic Engineering Assignment, NYP, Singapore

Question 1

Design a circuit to ensure that two LEDs in the following specifications will turn on. In your design, you are to fulfill the following in detail:

• Choose the specifications in the table below according to the digit shown in your Student ID.
• Draw the circuit configuration that will turn on the two LEDs.
• Explain with all workings clearly shown on the derivation of all components values clearly.
• Determine the total power dissipated by the power supply.
• State all necessary assumptions.

Last 3rd digit Power Supply

• 1, 2, 3 = 5V – 9V
• 4, 5, 6 = 7V – 12V
• 7, 8, 9, 0 = 10V – 15V

Last 2nd digit LED Color

1. 1, 6 Blue (VF = 3.5V, IF = 20mA)
2. 2, 7 Red (VF = 1.7V, IF = 20mA)
3. 3, 8 Green (VF = 2.1V, IF = 20mA)
4. 4, 9 Yellow (VF = 2.0V, IF = 20mA)
5. 5, 0 White (VF = 3.5V, IF = 20mA)

The last digit LED Configuration Even, 0 Parallel Odd Series

Question 2

Design a circuit to ensure that the voltage output is regulated and satisfy the given application below.

Requirements:

• Voltage regulator output requirement: 4.3V and 1A.
• Unregulated input power supply available:
  1. Supply voltage range: 3V – 20V
  2. Power Wattage: 1W, 5W, and 10W

• If the last digit of your Student ID is an odd number, your circuit will be used to drive a toy car with a load impedance of 1kΩ.
• If the last digit of your Student ID is even number, the circuit will be connected to an electrical heater with a load impedance of 100Ω.

In your design, you are to fulfill the following in detail:

1. Explain your choice of the power supply used.
2. Draw the circuit configuration and explain your circuit design clearly: state the advantages and disadvantages of your circuit design.
3. Clearly state the function, brand, and model of all the components used.
4. Explain with all workings clearly shown on the derivation of all components values clearly.
5. State all necessary assumptions.