Hi Oli,

many thanks for your appreciation.

Depends from the type ol Led that you use.

In this case, the led is certified for 45 mA of current absorbtion. You apply the 1st Ohm law : R (resistence) = V(volt) : I (ampere )

This led is certified for 45 mA, your power supply is 7,2 Volt = 7,2 : 0,045 = 160 Ohm. This is the value of resistor

If the power supply will by 11,1 V ( 3Li-Po in Serial config ) = 11,1: 0,045 = 246 Ohm ( Commercial value of 220 or 270 is good.)


Regards


Luciano
www.flyunitedteam.net