From: "Brill Pappin"
References: <3D860E7B.FD6B3171@xympatico.ca> <firstname.lastname@example.org>
Subject: Re: Contactless recharger
X-Newsreader: Microsoft Outlook Express 6.00.2600.0000
Date: Tue, 17 Sep 2002 19:11:21 GMT
NNTP-Posting-Date: Tue, 17 Sep 2002 15:11:21 EDT
Of course the system is fairly sensitive, it could be as simple as a reed
- Brill Pappin
"Barry E Porter" wrote in message
> On Mon, 16 Sep 2002 13:01:47 -0400, Joseph Legris
> >"Technical Dept." wrote:
> >> Does anyone know of a circuit or components to build a contactless
> >> ?
> >> What I have to design is a 24Vdc desktop station that allow to
> >> when inserted, an hand-held terminal (with battery inside)
> >> The two part are inductive coupled.
> >> Thanx a lot for any suggestion
> >> gabriel
> >You will want to reduce leakage inductance in the magnetic circuit as
> >much as possible. The cores must be separated by the thickness of the
> >housing (presumably plastic), so make sure the width of the core
> >interface is large and any leakage paths through air are long compared
> >to the width of the gap. You might try looking at some existing
> >products, such as electric toothbrushes, to get some ideas for a good
> >Best regards,
> >Joseph Legris
> What puzzles me about my Braun toothbrush, is that if the charger unit
> is plugged in and I turn on the toothbrush, then place it onto the
> charger, it stops working. When it gets totally clapped out, I'll tear
> it apart to find out why, but does anyone know?
> Barry E Porter
> Professional Audio Creativity