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Old Dec 04, 2012, 10:30 PM
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tom bacsanyi's Avatar
farmington hills mi.
Joined Sep 2006
848 Posts
rc beacon flashes battery voltage

I set up two beacons on the top and bottom of my Citation (hero) jet that flashes the voltage of a six cell lipo as follows: 6 flashes if over 4 volts per cell, 5 for 3.9 volts an so on to 2 if over 3.6 and 1 if under 3.6 (empty). I made a video with a 10 cell battery, 6 and 4 cell. At the start it is flashing 6 times but then with application of part throttle it drops to 4 flashes as the smallish battery is running 2 90 mm fans and the battery drops below 3.9 volts. With the throttle closed the flashes go back to 6 as the battery is still nearly fully charged. The cool thing is that I don't need to look away to see how the battery is doing. The video:
(1)20121205 183445 (0 min 30 sec)
The flashes are 35 milliseconds long so if your playback is dropping frames, you will miss flashes. This will be used on 10 and 12 cell series/parallel packs but will monitor one 6 cell pack which will tell the story.
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Old Dec 05, 2012, 07:53 AM
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Joined Aug 2009
1,398 Posts
I like it Tom. Nice idea.

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