- What is a Variable Resistor? - What is a Voltage Divider? - How do you calculate it? ## Variable Resistors ## Resistor Ladder as Voltage Divider Ohms law Resistors in Series Voltage Divider ## Calculating a Resistor Divider Network - [ ] Measure the extremes of the variable resistor $[Rlow – Rhigh]$ - [ ] Choose whether this will be the Rtop or Rbot $Rbot = (Rtop)/(Rbot + Rtop)$