Can you control
the circuit?
Explore how single-pole, single-throw (SPST) switches change an HVAC electrical circuit. Make a prediction, operate the real Falstad simulation, and explain what you observe.
Switching logic · Current paths · Observations
Before you touch the switches
🎯 By the end of this preview, you can…
- Describe what an SPST switch controls.
- Predict the effect of opening and closing a switch.
- Observe circuit behavior in a working simulation.
- Explain one result using the idea of a complete current path.
Predict before you click.
Look at the switch labels and the paths in the embedded diagram. Pick one switch. What do you expect to change when you close it? Write down your prediction before testing.
HVAC circuit sandbox
This is your supplied Falstad circuit, embedded inside the course.
Choose one switch
Identify a switch in the diagram. Predict what will happen to a connected load or current path when its state changes.
Change one thing
Click that switch in Falstad. Watch for a change, then return it to its original position. Try another switch.
Tell us why
Record what changed. Did the switch complete or interrupt a path? What evidence did you see in the simulation?