Thread: Mini-Review WLtoys V949 UFO Quad Mini-Review
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Old Dec 25, 2012, 06:45 AM
mikefromgermany is offline
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Quote:
Originally Posted by Soul Reaver View Post
I hope that someone with an "original" 949 can answer, when I was using it stock I never noticed this overheating.
I will try to add a resistor.
thanks.
The data with the OEM red V949 LED bar, freshly charged serial batt:

connected to LED-sockets (but motors not running):
V949 JR-WL-FD02R-1 2012/07/30 Rev02 : 24,0mA @3,2V
V929 JR-WL-FD02R-1 2012/07/22 Rev01 : 25,0mA @3,2V
At both boards the strip doesn't get warm.

Batt connected without resistor: 170mA (No wonder the LEDs getting burning hot)

Batt connected with 22 Ohm resistor: 60mA (still too high)

Batt connected with 62 Ohm resistor: 24mA (that's the one!)

All measurements were made with a cheap multimeter, so it is useless to argue about some mA. But the dimensions are right.

Summary:
You'll encounter no problems using the original LED-ports, but if you want to connect the red strips direct to a 1S LiPo, use a 62 Ohm 0,25W resistor per strip.


-mike-
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