LED Question

[Ludwig von wigbearer]

Good morning all, I have bought some 3mm leds, white and red, both light fine on a 3v flat disc battery, the tanks
lighting circuit is about 3.4v, the reds light up no problem on the 3.4v, but not a glimmer from the white leds, its
not blowing the white as when checked again on the 3v battery they work.
Any solutions welcome in lay mans terms please as I am a mathematical idiot.

regards john

[Estnische]

You know they have polarity?

[Ludwig von wigbearer]

Good afternoon, yes I do know that much short/long leg ect, I have seen some resistors on ebay which allow 3.3 volts
to work with the 3v led, tank light circuit is 3.4v so that may work.

regards john

[c.rainford73]

Check your upper hull wiring voltage make sure it's not an open circuit or broken connection?

[Ludwig von wigbearer]

Hi carl, I have completely rewired the upper hull, running red leds all round at the moment
so there is power at all 4 lighting points.

regards john

[Estnische]

From my experience, the slight extra voltage shouldn't stop them from working, merely shorten their life. I've used this site to help design a few kids' school projects.

http://led.linear1.org/led.wiz

[c.rainford73]

That's correct my M-3 Lee project has 4v running the white headlights. My t-34/85 has 4.6v running the headlight off a servo controlled switch for a long time with no issues.

[PainlessWolf]

Good afternoon!
Has anyone here had any luck running one of those speck o' nothing leds off of the servo port in the RX?
regards,
Painless