Driving a 7805 or how else to get +5VDC reg (was Re: My first good find!!!)

From: Dave McGuire <mcguire_at_neurotica.com>
Date: Mon Dec 16 18:56:29 2002

On Friday, December 6, 2002, at 03:44 PM, Ethan Dicks wrote:
> So I was thinking about this recently... I have this 6V battery
> pack that is intended to clamp to the back of a ZIP drive, allowing
> it to be used away from power, say with a laptop. I've wanted
> to use it for a portable source of juice for hobby projects (it
> has, among other features, a built-in 110V mains plug and recharger,
> making it handy to recharge), but I haven't expected to be able to
> feed a 7805 at +6VDC and get +5VDC out the other side reliably.
> How can I take +6VDC of battery power and get +5VDC regulated power
> from it? If it matters, the currents involved will be under 1000mA,
> but probably over 200mA.

   You could use a low-dropout linear regulator like the LM2940. These
are readily available and easy to use, but not quite as cheap as the


Dave McGuire                "Why would a brothel need
St. Petersburg, FL            a streaming media server?"        -Kevin
Received on Mon Dec 16 2002 - 18:56:29 GMT

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