View single post by Toeffelholm
 Posted: Thu Jul 14th, 2011 10:06 pm
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Toeffelholm



Joined: Sun Sep 21st, 2008
Location: Germany
Posts: 463
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Ed,


The micro ESCs I use are from the 1:87 scale RC-modellers, and have also no battery cut off.


This special ESCs with LiPo cut off - at least the ones that I know - do not really cut the ESC off from the LiPo.
What they do is reducing the voltage when the critical value is near.


So a "normal" RC-modeller recognizes that his model gets slow & knows that it is time to return his model & he has to switch it off.
If you don't do this, the quiescent current will do the rest.


I have been aware of this low-voltage problem since I started with LiPos and so use special Lipo saver circuits,
that give a light or sound signal when voltage is approaching the critical value.
So I'm warned also when the Loco is only standing on the layout.


And nevertheless, I have managed to destroy the one or other LiPo,
just by forgetting to switch the loco off, before leaving the room.


But with Herb's method to use a constant headlight as signal that a loco isn't switched off,
I had no more losses up to now.


Juergen




____________________
modelling in 1:22.5 on 32mm and 16.5mm track
Actual project: 7/8" scale on 45 mm track
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