I have several types/colors of LEDs, both 3mm and 5mm, that specify a range for Forward Voltage (such as 3.2-3.5V) and/or a range for Current (such as 20-25 mA). I'm using some of the free online LED circuit design programs. My application is in RC airplanes where I can use a steady 5V or 6V power from the receiver or power from the flight battery which will typically vary from about 12.6V to 11V as the plane is flown. The number of LEDs in a single circuit will vary from 2 to about 15. Given this application, should I tend to design for the lower or higher Forward Voltage? Lower or higher Current? Any and all design tips will be appreciated. Thanks.
- Rick