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EC ENGR 121B · Dis 1C

Principles of Semiconductor Device Design

Fall 2026Zhang, K.4 units

Seats, time, final and grades

Seats

Open, 1 seat left.

34 of 35 enrolled.

Read 12 hours ago. The latest refresh is overdue. Seats and instructors may have changed since. Check the registrar before enrolling.

Meets

F 2:00pm-2:50pm

This discussion only. You also attend Lec 1.

Final

Wed 9 Dec, 8:00am to 11:00am

One exam for the whole class, Los Angeles time.

Read 3 days ago.

Grades

3.52

Predicted GPA

Historical records across all instructors; 473 letter grades

dibs has seen this section open 3 times since 18 August. The last time was 4 October.

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Before you can enroll

Registrar's Restrictions cell, read 33 hours ago: "Undergraduate School of Engineering, Computational and Systems Biology, Linguistics and Computer Science, or Mathematics of Computation Majors. Premajors Are Excluded From This Population".

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From the registrar

Students who enroll in upper-division courses offered by the Samueli School without completing the requisites are subject to disenrollment after the second class meeting. If necessary, consult with an OASA counselor through MyUCLA Message Center.

Restrictions read 33 hours ago.

When it meets

This discussion and its linked lecture.

Mon
Tue
Wed
Thu
Fri
10am
11am
12pm
1pm
2pm

Lec 1

10am-11:50am

Lec 1

10am-11:50am

Dis 1C

2pm-2:50pm

Scroll sideways for the whole week. All meeting times are listed below.

  • Dis 1C

    F 2:00pm-2:50pm

  • Lec 1 (required lecture)

    TR 10:00am-11:50am

Boelter Hall 5436

Grades

3.52

Predicted GPA

Historical records across all instructors; 473 letter grades

Of the 4 people in the grade record for EC ENGR 121B, the 2 with the most grades: EMAMINEJAD, SAM at 3.70 over 322 grades and IYER, SUBRAMANIAN SRIKANTESWARA at 3.07 over 94 grades.

A range
67%
P/NP
<1%
D/F/W
2.1%

Full grade history for EC ENGR 121B

What students say

dibs measures outcomes: grades, seats, how fast it fills. For what the class is actually like to sit in, BruinWalk has the reviews.

What the work looks like

  • Exams mentioned, no number given, 3 mentions in past reviews
  • Quizzes mentioned, no number given, 1 mention in past reviews
  • 5 problem sets, 2 mentions in past reviews

Based on 26 reviews; source checked 7 days ago. dibs counts only what a review actually states, so a kind of work nobody mentioned is absent rather than zero.

Will it still be here

high risk chance of closing before your enrollment pass.

Final enrollment per term from four years of grade data. Summer excluded: different population, different pass structure.

  • 8522W
  • 3522S
  • 2422F
  • 9623W
  • 3223F
  • 14124W
  • 3625F
Enrollment by term: 22W 85, 22S 35, 22F 24, 23W 96, 23F 32, 24W 141, 25F 36

Peak 141 · most recent 25F at 36

Seats over time

Nothing read since 16 Oct, 12 hours ago. Over about 2 months before that, freed 1 seat.

3 times reopened
34 of 35 · 1 left
18 Aug 18:4017 Sep 03:3116 Oct 12:23 · 12 hours ago
Checked 168 of the 1209 hours with hourly history, 14%. No reading was recorded in 1041 hours. dibs had no hourly record before 27 Aug, which is the other 202 of 1411 plotted.34 of 35 enrolled at the newest reading, 12 hours ago, with 1 left. Seats from 18 Aug 18:40 to 16 Oct 12:23, 35 to 34. Checks are not continuous monitoring. Changes between checks may be missed.

A dot is a reading where something moved: the seat count, the status, or the waitlist. Flat between dots joins recorded counts; changes between reads may be missed. The line starts when dibs first saw this section rather than reaching back before it existed. The last one is the last time dibs read this section, moved or not, and that was 12 hours ago. It is where the line stops, not where the count is now.

Show the readings (7)
Recorded Enrolled Capacity Status Waitlist Hours read
16 Oct 12:23 34 35 open - 41 of 283
4 Oct 18:12 34 35 open - 25 of 183
27 Sep 04:02 35 35 closed - 2 of 5
27 Sep 00:02 34 35 open - 2 of 5
26 Sep 20:32 35 35 closed - 12 of 54
24 Sep 15:52 34 35 open - 91 of 886, 202 no hourly record
18 Aug 18:40 35 35 closed - -
How readings and alerts work

Dated seat counts can be available even when hourly check history is missing. Gaps do not show whether seats changed between observations.

Seat counts show the last successful read, not live availability. Refreshes can be delayed by request limits or upstream interruptions. Watched sections receive priority, but an hourly update for every section is not guaranteed.

The registrar can change a seat count between our checks. Alerts depend on dibs detecting an opening and completing delivery; a quiet watch does not prove that no seat opened. Check the registrar before enrolling.

Class chat

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