Re: creating a 9VDC rechargable battery backup for an alarm clock radio
From: Vidar Løkken (njus_at_vidarlo.net)
Date: 03/21/05
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Date: Mon, 21 Mar 2005 22:08:13 GMT
techman41973@yahoo.com wrote:
> http://store.yahoo.com/minilab-supply-store/raynimchar9v.html )
> Do any of you know what I could expect as far as voltage from the
> charger across an 8.4v NIMH battery while its charging? As long as the
> voltage remains below 10v, the clock should tollerate it well. Thanks
You can add a diode (a germanium only lowers voltage by 0.2-0.3V), thus
stopping current from the charger to the clock, when charging. Add a
diode pointing towards the clock connection from the + of the battery. I
can draw you a quick schema if you want :)
-- MVH, Vidar www.bitsex.net
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