I
have divided the entire class in 4 groups. Each TA will serve one group
for the following weeks to help you meet the requirements of this
assignment.
There are 2 tasks for this assignment. Task 1: PCB soldering and assemly (200 points) Task 2: PCB testing and demo to the TA (100 points)
Rubric: Task 1: Have the board assembled by the end of Monday 11/11. (TAs will determine partial credits)
Board is assembled before the deadline and checked by one of the TAs (Monday 11/11 at 8:50 pm) (50 points)
No apparent short circuits (50 points)
No damaged components (50 points)
Board doesn't need to be replaced by a second version (50 points)
Task 2: Run the following 4 demonstrations to your assigned TA by Monday 11/18 at 10:50 pm (TAs will determine partial credits) Test No. 1: Power up your PSU board (25 points) DPDTs: Voltage and V_SET Potentiometers: Clockwise to the max
Test No. 2: LED ladder testing (25 points) DPDTs: Voltage and V_OUT Potentiometers: Change the V_SET potentiometer and the I_SET potentiometer separately to observe the LED ladder sequence.
Test No. 3: Adjust the current limit to support a heavier load (25 points) DPDTs: Voltage and V_OUT Potentiometers:
Set V_SET and the I_SET potentiometers to just enough to turn on 4
LEDs. Connect the 51 ohm and 18 ohm resistors to the board separately
to observe the results. You don't have to use the exact 51 ohm and 18
resistors. The goal is to test the circuit's adjustable current output
to support different loads. Similar resistors work too. Please remember
to put these resistors back to the envelopes after you complete this
task.
Test No. 4: Change the current limit setting(25 points) DPDTs: Current and I_SET Potentiometers: Change the I_SET potentiometer to observe the I setting on the ladder LEDs.