Led Calculator

LED Calculator - Current limiting resistor calculator for LED arrays

Language: English (US) English (UK) Français Română 简体中文 Svenska Magyar Български Русский Deutsch Español Türkçe Polski Português (Brazil) Nederlands Italiano


This LED calculator will help you design your LED array and choose the best current limiting resistors values. To get started, input the required fields below and hit the "Design Circuit" button.
Power supply voltage (V):  Help
LED voltage drop (V):  Help
LED current rating (mA):  Help
Number of LEDs:  Help
Output:
 
Please wait
Print  Print
120Ω
+12V  
120Ω
  GND
120Ω
120Ω
120Ω
120Ω
120Ω
120Ω
120Ω
120Ω
120Ω
120Ω
120Ω
120Ω
Share your design: 



Direct URL:  
  • You will need 14 x 120 ohm 1/8 watt resistors.
  • The 120 ohm resistor is color coded: Brown, Red, Brown, Gold.
  • Each 120 ohm resistor consumes 48 milliwatt.
  • Total power consumed by the resistors is 672 milliwatt.
  • Total power consumed by the LEDs is 2688 milliwatt.
  • Total power consumed by the circuit is 3360 milliwatt.
  • Total current drawn by the circuit is 280 milliampere.
  • The resistor values are calculated based on the common ±5% tolerance resistors.
  • Make sure to wire the LEDs in the correct direction as shown below.
  • Always leave some space for the resistors to breathe. They might get hot.


Useful Links

Report a bug  Report a bug     Contact  Contact     Privacy Policy