LED Light wire harness question
 

I have some 10mm LED Bulbs that I will be running 4 in the upper light bar.
I want to run them on a 1300Mah 7.4v (2s) lipo
Here are the specs.

SPECIFICATIONS:
Source Material:InGaN !
Emitting Colour:10MM POWER WHITE 1W LED
LENS Type:Water clear
Color Temperature: --
Luminous Intensity-MCD: Typ: 390,000 mcd
Reverse Voltage:5.0 V
DC Forward Voltage: Typical:
DC Forward Current:300mA
Viewing Angle:40 degree
Lead Soldering Temp:260°C for 5 seconds

If I run a pair of them in series The amp draw would be 6v min. and 6.8v would be best and 7.2v Max

Because I want to run the servo at 7.4v the lights would also need to be at 7.4v
What would be the best way to do this and what resistors are needed?

Thanks to whom ever knows how to do this.

Re: LED Light wire harness question
 

First read this thread.
http://www.rccrawler.com/forum/elect...wire-leds.html

This LED calculator will calculate the resistor values for you and design the circuit for you.
LED series parallel array wizard

If you still have questions after checking the links out, ask away.

Re: LED Light wire harness question
 

That is AWESOME! Thank you.

Solution 0: 2 x 2 array uses 4 LEDs exactly

+7.4V
R = 4.7 ohms
R = 4.7 ohms
The wizard says: In solution 0:
each 4.7 ohm resistor dissipates 423 mW
the wizard says the color code for 4.7 is yellow violet gold
the wizard thinks 1W resistors are needed for your application
together, all resistors dissipate 846 mW
together, the diodes dissipate 3600 mW
total power dissipated by the array is 4446 mW
the array draws current of 600 mA from the source.