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Re: [OM] Control pack charging

Subject: Re: [OM] Control pack charging
From: "Rand E. Tomcala" <rtomcala@xxxxxxxxxxxxxx>
Date: Tue, 28 Oct 2003 07:37:09 -0500
  One thing that most of us forget, is that the grip pack was intended ,
also, for use with 1.5v alkaline cells and that would be the top working
voltage to be taken into consideration.
   Rand E.

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Frank van Lindert wrote:
> 
> Mark,
> 
> You are right as far as the contact pins are concerned (although one
> of the pins is not connected through to the other end of the relay
> cable).
> But IMHO the implication of this is, that connecting ANY power source
> to the motor drive (e.g. a 16 volt battery, without any current
> limiter at all!) would not only provide energy operate it but also at
> the same time charge the NiCad pack continously. Would that indeed be
> true?
> E.g. using the AC Control box, meant for long term use in the
> laboratory, would keep charging the NiCad for an indefinite time. I
> know that 15-16 volts will probably not harm the NiCad Pack, but fresh
> batteries could give more than their nominal voltage... perhaps 18-20
> volts. How about that? Perhaps many people using a 'strange' DC source
> did damage their NiCad Packs that way already... or am I overlooking
> something?
> 
> Frank.
> 
> On Mon, 27 Oct 2003 19:34:16 -0500 (EST), Mark Dapoz <md@xxxxxxxxxxxx>
> wrote:
> 
> >On Mon, 27 Oct 2003, Frank van Lindert wrote:
> >
> >> unfortunately you cannot use the DC contacts on the relay cord; for
> >> charging different pins are used. But rebuilding the thing is
> >> definitely possible.
> >
> >I believe the power contacts on the relay cord already line up to the correct
> >pins for charging the control pack.  It's not meant to be used for that
> >purpose, but it will work.  Just remember to use a suitable resistor to
> >limit the current to C/10.  I think a 1/2K to 1K resistor at 16V was about
> >right.
> >                               -mark

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