5. Select a Resistor to Drive an LED

You are designing a basic LED indicator circuit powered by a 12V supply. The red LED has the following characteristics:

  • Forward Voltage (VF) = 2V
  • Desired Forward Current (IF) = 22mA
Resistor Led 12V circuit

Your goal is to select a surface-mount resistor to safely limit current through the LED while maintaining proper brightness and ensuring long-term reliability.

👉 Find the appropriate part on DigiKey & Submit the DigiKey part number. [know more]

Submit Your Solution

DigiKey Part Number

Search the suitable part on DigiKey and paste the part number. Know more

Please login in to validate part number.

EW AI

EW AI validates your selected part with expert-level precision.

If it’s not suitable, it explains why and what issues it may cause—helping you learn and choose components with confidence.