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Power supply

J

John Griffin

Jan 1, 1970
0
Something I would like to find: A regulated nine volt power supply
that has an adapter that fits in the battery compartment and
provides exactly the same power as a nine volt lithium battery
without enriching the energizer bunny folks. Is there such a
thing?

I can make the battery compartment insert if I can get the right
power on a pair of wires or terminals, but I'd rather find the
package if it exists.

(Yes, I know about recharging, and yes, I forget to do it.)
 
B

Bob Monsen

Jan 1, 1970
0
Something I would like to find: A regulated nine volt power supply
that has an adapter that fits in the battery compartment and
<hates polluting the environment with used primary batteries>

You can buy battery snaps that connect to a standard 9V battery terminal.
By connecting this to a regulated 9V AC adapter, you have your result.

http://tinyurl.com/dznnx

The regulated wall-adapter is easy. Here is the first one I found with
google:

http://www.steroidmicros.com/accessories/accessory.aspx?ID=Psw9-430

Or, you could simply build one yourself using a non-regulated 12V
adapter.

You will need to build the interface between them, such as it is.

I have a logitech wireless keyboard that eats batteries like popcorn. It
doesn't work on rechargeable AA batteries, probably due to some voltage
requirement (primary cells are >1.5V when new, whereas secondary cells
are nominal 1.2V). So, I bought a surplus 8.4V liion battery, built a
little regulator circuit, and two cells + the regulator fit into a cute
little box hanging off the keyboard. However, even with this, it still
sucked (just not batteries) so I gave up using it. It would lose
synchronization with the mothership, and you had to take the batteries
out, hold down the keys for 30 seconds, put the batteries back in, hold
the button on the mothership pod for 15 seconds, and push the button on
the back of the keyboard (as documented on the logitech site... sigh).
This would happen once a day. My belief was that the microcontroller
running the keyboard was locking up. Junk.

--
Regards,
Bob Monsen

The abrupt change from rapport of water ritual to a situation in which
a newly won water brother might possibly be considering withdrawal or
discorporation would have thrown him into panic had he not been
consciously suppressing such disturbance. But he decided that if it
died now he must die at once also he could not grok it in any other
wise, not after the giving of water.
 
J

Jasen Betts

Jan 1, 1970
0
Something I would like to find: A regulated nine volt power supply
that has an adapter that fits in the battery compartment and
provides exactly the same power as a nine volt lithium battery
without enriching the energizer bunny folks. Is there such a
thing?

I've not seen one - which is odd because regulated 9v power supplies are
easily found, and the battery terminals aren't hard to get either.
I can make the battery compartment insert if I can get the right
power on a pair of wires or terminals, but I'd rather find the
package if it exists.

you may have to that's the route I went.

bye.
 
J

John Griffin

Jan 1, 1970
0
Jasen Betts said:
I've not seen one - which is odd because regulated 9v power
supplies are easily found, and the battery terminals aren't
hard to get either.


you may have to that's the route I went.

bye.

Thanks for the reply!

I have a feeling that the companies that make those batteries
have tied up all applicable patents and aggressively pursue in
court anyone who tries to make such a thing.
 
J

John Griffin

Jan 1, 1970
0
Bob Monsen said:
<hates polluting the environment with used primary batteries>

You can buy battery snaps that connect to a standard 9V
battery terminal. By connecting this to a regulated 9V AC
adapter, you have your result.

http://tinyurl.com/dznnx

The regulated wall-adapter is easy. Here is the first one I
found with google:

http://www.steroidmicros.com/accessories/accessory.aspx?ID=Psw9
-430

Thank you! Both of those links were just what I needed, even
though I hope to find the stuff locally.
Or, you could simply build one yourself using a non-regulated
12V adapter.

Not me...I'm a klutz. I have no idea how that would work.
You will need to build the interface between them, such as it
is.

I have a logitech wireless keyboard that eats batteries like
popcorn. It doesn't work on rechargeable AA batteries,
probably due to some voltage requirement (primary cells are
I bought a surplus 8.4V liion battery, built a little
regulator circuit, and two cells + the regulator fit into a
cute little box hanging off the keyboard. However, even with
this, it still sucked (just not batteries) so I gave up using
it. It would lose synchronization with the mothership, and you
had to take the batteries out, hold down the keys for 30
seconds, put the batteries back in, hold the button on the
mothership pod for 15 seconds, and push the button on the back
of the keyboard (as documented on the logitech site... sigh).
This would happen once a day. My belief was that the
microcontroller running the keyboard was locking up. Junk.

Thanks for that...I've had good performance from a wireless
mouse, and I've been thinking about getting one of those
keyboards. I won't!
 
R

Rich Grise

Jan 1, 1970
0
<hates polluting the environment with used primary batteries>

You can buy battery snaps that connect to a standard 9V battery terminal.
By connecting this to a regulated 9V AC adapter, you have your result.

http://tinyurl.com/dznnx

These are designed to snap onto a battery, and provide power to the
circuit. If you're going to connect one of these to a power supply,
be sure and reverse the red and black leads, because they'll be
wrong. In other words, the negative of the supply should go to
the red lead of the battery snap, because that snap will snap
into the one with the black lead on the equipment side.

Good Luck!
Rich
 
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