Resistor (1/4 W carbon film) Applications

Set the current of LEDs, transistor bases and optocouplers: R = (V − Vdrop) / I.

Scale a voltage for an ADC input or make a reference: Vout = Vin × R2 / (R1 + R2).

Give an input a defined level when a switch or open-collector output is off; 4.7–10 kΩ is typical.

Find Resistor (1/4 W carbon film) in the Components Library to place its schematic symbol and connect its pins.