Scott,
Thanks for the nice answer.
Barry Ma
-
On Tue, 26 September 2000, Scott Lacey wrote:
Barry,
These use magnetic coupling to transfer the charging energy. In essence, the
transformer secondary is inside the toothbrush handle, along with the
rectifiers and rechargeable
Message-
From: Barry Ma barry...@altavista.com
To: emc-p...@majordomo.ieee.org emc-p...@majordomo.ieee.org
List-Post: emc-pstc@listserv.ieee.org
Date: Monday, September 25, 2000 6:18 PM
Subject: Re: Battery Safety
Chris' email reminds me of a relevant question:
The charging stand for a battery
Chris' email reminds me of a relevant question:
The charging stand for a battery-driven toothbrush (Sonicare) has no contact
with the toothbrush. What is the charging mechanism? Is it safer than other
battery?
Best Regards,
Barry Ma
I've seen this resistor used for the low battery alarm circuit. It keeps the
battery voltage from rising as load is shed and confusing the low battery alarm
circuit. There is no safety reason that I know of. 91K ohm is an odd value
though, left overs from another product? I'm assuming that the
Hi,
I've seen this done before on low current designs. Sometimes when you
replace the batteries in this type of design the circuit voltage does not
have time to drop completely away due to the charge saved on bulk
capacitors. When the new batteries are added the circuit comes up in a
peculiar
Chris:
Is the battery a rechargeable? Have you tried disconnecting the 91K
reisstor and measuring the resulting voltage increase? Doesn't make sense
to me.
Ralph Cameron
EMC Consulting and Suppression of Consumer Electronics
(After sale)
- Original Message -
From: Maxwell, Chris
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