Voltage Divider
Two resistors split voltage proportionally — key to sensor interfacing
ResistorVoltageOhm's LawSensors
Live SchematicCurrent flowing
Circuit ON — current flowingStep 1 / 4
Two Resistors in Series
5V connects across R1 and R2 in series. The same current flows through both: 5V ÷ 3kΩ = 1.67mA.