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From: firstname.lastname@example.org (N. Thornton)
Subject: Re: 3V DC back-up power!
Date: 1 Nov 2002 13:59:55 -0800
NNTP-Posting-Date: 1 Nov 2002 21:59:55 GMT
email@example.com wrote in message news:...
> Are you talking about the BASIC stamp? I've got that too...however,
> it is the BSI. I got this to start learning about microcontrollers.
> Very interesting stuff...apparently you can do almost anything with
> this. My problem is that I do not know the BASIC language...quite
> familiar with C++, but not BASIC. If you know of a site that will
> teach BASIC from the bottom up, please let me know!
> Otherwise, I have started to design my own circuit for the 3V back-up
> power supply. I've started out with relays, capacitors, and
> resistors, but I think I will require transistors in place of the
> relays. Now, I am more inclined to think it can be done with a BASIC
> stamp. It could be easy depending on how well I get to know the
> Thanks for the input! And please, once again, if you know how or
> where I can learn BASIC for free let me know.
> onestone wrote in message news:<3DBFE0D4.49CCAAAE@chariot.net.au>...
> > I have a postage stamp sized module that takes 2.4V to 5.5V in and
> > outputs 3.3V at up to 150mA. It has self healing fuse, reverse polarity
> > protection, and a shutdown pin if you're interested. I have a similar
> > module that takes 0.7V to 5.5V in and can output up to 1A at 3.3V. The
> > second board can be modified for 3V out. How you tie it into the clock
> > depends upon which clock you are using. Other than that there are plenty
> > of build it yourself options that I know of.
> > Al
> > firstname.lastname@example.org wrote:
> > >
> > > I'm looking for a product that will provide 3V DC output from a
> > > lithium battery in the case when main power dies. The device has to
> > > have the capability to be tied into an existing item such as a clock
> > > (to keep it alive during a power outage).
> > >
> > > Thanks
> > >
> > > P.S. - I am not looking for diodes and components to make this
> > > thing...just asking if there is a product for sale out on the market.
Basic is dead easy, just get a manual of commands and off you go. Its
designed to be the easiest lingo to learn and use. Hence the name.
All you need is a comparator and a fet. Be much quicker than learning
basic! FET connects / disconnects battery, comparator connects it when
Vsupply < Vbatt.
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