ENGR201 Lab 2018 Fall
Lab 2
Using LTSpice for circuit simulation. Due Sep 10, Monday 10 pm.
Outcome of this lab:
1. Be familiar with LTSpice.
1. Be more familiar with the lab equipment.

1. Build the following circuit in LTSpice by three different methods: 1) Write the spice code in an external .txt file. 2) Write the spice code in LTSpice but using '.op'. 3) Build the circuit using electrical symbols in the library.

2. Calculate the Current I and Voltage Vout using the 'Ohm's Law', and verify your calculation using simualtion. Also, build the circuit on a breadboard and verify the voltage and current using a multimeter.

3. Do a DC Sweep for V1 in LTSpice only. The DC sweep starts from 0 V stops at 10 V, display the result of V1 and Vout on your simulation result. Show it in your report.

4. The power consumption of a circuit is P=VxI. Since the voltage supply is usually fixed. To reduce the current flow through the circuit can redue the power consumption.

If you are asked to design a 'Voltage Divider' to provide 3 V out of a 6 V DC power supply, what is the preferred resistance of the dividing resistors should be used in the circuit? (should they be in the tens-ohms level or in the kilo-ohms level?) Explain why and build it in LTSpice and on your Breadboard. Show the results in your report.

5. Use a multimeter to test the current I in your voltage divider and calculate the power consumption of your circuit.

6. Calculate current I and Vout of the following circuit, and verify using simulation and a real circuit on the board.

** Report your results (with figures and texts) on the website.

Follow the lab report guidelines to avoid losing points.