LED light on Hummingbird Tail - RC Groups
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Nov 10, 2003, 04:07 AM
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LED light on Hummingbird Tail

I would like to add an LED light to the tail of my hummingbird motor. I found this pic of it dont b4 see attached. What amp / volt LED do i need to take the least power from my heli? And do I need anything else to go with it like a diode? etc?

Im running 2 x lipos and gws direct drive tail motor

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Nov 10, 2003, 04:41 AM
There is no spoon
Dax's Avatar
2.2Kohm resistor inline with a standard led should work
Nov 10, 2003, 04:58 AM
Registered User
Thanks for your reply Dax There is a few different standard LEDS on this website


5v, 12 v etc which type would be best?

Nov 10, 2003, 05:11 AM
Registered User
i suggest u use a 620ohm resistor
8.4V=20MA x R
anyway USE from tail motor is not good ,becase your motor `s V
is changing in flying so the led maybe donnot work~............
Nov 10, 2003, 05:12 AM
Registered User
sorry type wrong is 420ohm no 620 ohm..=.="
Nov 10, 2003, 05:27 AM
Registered User
>anyway USE from tail motor is not good ,becase your motor `s V
>is changing in flying so the led maybe donnot work~............

Thanks for your help with the resistor! I would of thought the led will just get brighter or dimmer.

Any leds on this page u suggest?

Nov 10, 2003, 05:37 AM
Registered User
WELL~I suggest red or white 5mmLED because is brighter AND sharp.I have been use 8white led on the head of on hb....wow..when it open....very.....in night....
Nov 10, 2003, 05:38 AM
Registered User
"of on hb"= of my hb
Nov 10, 2003, 06:10 AM
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Nov 10, 2003, 07:04 AM
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Supersix's Avatar
i used a 3mm flashing led a tantlum capacitor and a zenner doide i got the specs from the above link i look great i have also put lights on the body that can be switched on and off remotely

i will look for what specs 2morrow night all
Nov 10, 2003, 05:41 PM
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Nov 11, 2003, 04:50 PM
Vertically Challenged
Damien's Avatar

Led On Tail

What he is using is a Tantalum Capacitor and a 1N4148 Switching Diode with a flashing led .....

You need the Diode to separate the led from shorting the motor leads and the Capacitor to supply a constant voltage (or to regulate) to the LED

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