LED

LED

3mm
Red/Yellow/Green: 330Ω @ 5V, 150Ω @ 3.3V
Blue/White: 270Ω @ 5V, 75Ω @ 3.3V

LED symbol in schematics
  • Head Diameter: 3 mm
  • Voltage Drop:
    • Red/Yellow: 1.8V-2.3V
    • Blue/Green/White: 2.8-3.6V
  • Current: 20mA Max
ColorVfΩ @ 5V @ 10mAΩ @ 3.3V @ 10mA
Red1.81319 (330)149 (150)
Yellow1.89311 (330)141 (150)
Green1.91309 (330)139 (150)
Blue2.53247 (270)77 (82)
White2.57243 (270)73 (75)

LED resistor calculator. Formula for calculating resistance needed for current limiting:

\[ R = \frac{Vf}{A} \simeq \frac{2.0}{0.010\ (10 mA)} = 200 Ω \]

LED chart


AliExpress listing - 100PCS/lot 3mm 5mm F3 F5 Round LED Ultra Bright White Green Yellow Blue White Red Light Emitting Diode For Diy Kit