Do I need a resistor with the LowPower Illuminated power switch LED

[gregcope]

Hi All,

Head scratching here.  Do I need a resistor in series with the lower power lab Illuminated power switch LED on a 3.3v Moteino?

For clarity - this is for the LED.

I assume no, as I have read that 3.3v does not need one here;

http://electronics.stackexchange.com/a/203184

Ta.

[Felix]

It depends on how you use it.
For instance with ATXRaspi there is a resistor on the PCB already so all you need is wiring it to the board. That's what the intended purpose of the switch was as offered in the LPL shop.
You can of course use it with anything else. It's actually an "auto" switch so it will work with pretty much any voltage from 5V or more. It depends on how much current your source can give, you might want to use a 220ohm resistor just for safety so you don't overload your MCU/arduino chip.

[gregcope]

Thanks Felix