Potentiometers

Falstad Simulation: Potentiometers

Breadboard the circuit to complete the section below.

Questions

  1. When the LED is off, or very dim, what level is the 10k potentiometer set to?
  2. When the LED in on, what level is the 10k potentiometer set to?
  3. 10k potentiometers are variable resistors. Why are there additional 220R resistors paired with each LED?