LEDs are small and efficient lights. They are the future of modern lighting. But LEDs needs resitors to work properly. This app helps you to find the perfect resistor for your application.

Features:
- new design
- adjustable current and voltage
- shows next standard-resistor value and its colorcode
- a lot of preprogrammed LEDs
- several power sources like car-battery or 1.5V battery
- calculates power rating
- set number of rows and LEDs per row
- circuit preview and simple editing
- no ads

You can support my work by making a donation from the menu.