The op-amp lab, worked in 3D.
ECE 3155 Experiment II, Operational Amplifiers: every procedure step, the Part E design, and the three questions, seventeen activities in all, plus the six measurement tables. Each circuit is rebuilt in 3D from the handout’s figures; turn it, and step through a solution that lights up the part it is talking about. Every voltage and current on the circuit is computed from the circuit you see.
Nothing here is a measurement. Predictions and example designs are labelled; the tables start empty for your own readings, which stay in this page and are never saved or sent.
A1
Asked
Given
Conventions on this page
Where to start
Drag to turn · pinch to zoom · keys: arrows, + and −, T top view, R reset
Solution
All steps
Show the results
Your measurements
Type your own readings. Results appear as soon as their inputs exist; nothing is filled in for you. Entries stay in this page while it is open and are never saved or sent.
Volts. Signed, all in one measure; you can type mV, for example 12 mV.
Ohms; you can type k or M, for example 2.15 k.
Percent.
positive node negative node 0 V (ground)
Dots and arrows show conventional current at this instant. An ideal op-amp input takes no current, so no dots ever enter pins 2 or 3. Labelled arrows such as iRi are the defined directions used in the steps.
Waveforms
The circuit as text
| Part | Value or state | Connects | Current |
|---|
| Node | Voltage |
|---|
An independent study aid, not an official course resource or answer key from the University of Houston. Activity text follows the ECE 3155 Experiment II handout (Operational Amplifiers, September 2026); where the handout leaves a choice open, the choice made here is labelled. Example resistor values are illustrations with ±1% tolerance, not a kit inventory.