On Sun, 08 Jul 2012 20:48:29 +0100, Jake wrote:

I have an electronic GPS datalogging device that is designed to be
powered through a 9v battery. It runs the battery down in about 2 hours,
and because it goes through batteries so quickly, I have been looking
for solutions to make it last longer

I have had success in replacing the 9v battery with a 6 AA battery
holder with attached 9v clip and this powers the device for
significantly longer with 2500 mAh rechargeables giving 7.2v.

I have seen 8 AA battery clips available, that would give me 9.6v but I
am concerned about overvolting and damaging the device. Is the extra
0.6v likely to cause damage?

Put a dummy cell in the 8-pack and get 8.4v. Either buy on (Google) or
DIY with some dowel, a couple of pins and a piece of wire.

--
Use the BIG mirror service in the UK:
http://www.mirrorservice.org

*lightning protection* - a w_tom conductor

On Sun, 08 Jul 2012 20:34:18 +0000, Bob Eager wrote:

On Sun, 08 Jul 2012 20:48:29 +0100, Jake wrote:

I have an electronic GPS datalogging device that is designed to be
powered through a 9v battery. It runs the battery down in about 2
hours, and because it goes through batteries so quickly, I have been
looking for solutions to make it last longer

I have had success in replacing the 9v battery with a 6 AA battery
holder with attached 9v clip and this powers the device for
significantly longer with 2500 mAh rechargeables giving 7.2v.

I have seen 8 AA battery clips available, that would give me 9.6v but I
am concerned about overvolting and damaging the device. Is the extra
0.6v likely to cause damage?

Put a dummy cell in the 8-pack and get 8.4v. Either buy on (Google) or
DIY with some dowel, a couple of pins and a piece of wire.

But don't try and charge it!

--
Use the BIG mirror service in the UK:
http://www.mirrorservice.org

*lightning protection* - a w_tom conductor

On 08/07/2012 21:34, Bob Eager wrote:
On Sun, 08 Jul 2012 20:48:29 +0100, Jake wrote:

I have an electronic GPS datalogging device that is designed to be
powered through a 9v battery. It runs the battery down in about 2 hours,
and because it goes through batteries so quickly, I have been looking
for solutions to make it last longer

I have had success in replacing the 9v battery with a 6 AA battery
holder with attached 9v clip and this powers the device for
significantly longer with 2500 mAh rechargeables giving 7.2v.

I have seen 8 AA battery clips available, that would give me 9.6v but I
am concerned about overvolting and damaging the device. Is the extra
0.6v likely to cause damage?

Put a dummy cell in the 8-pack and get 8.4v. Either buy on (Google) or
DIY with some dowel, a couple of pins and a piece of wire.

A typical silicon diode drops around 0.6V, so a full 8-pack feeding the
logger via such a diode should give a pretty accurate 9V.

SteveW

SteveW wrote:
On 08/07/2012 21:34, Bob Eager wrote:
On Sun, 08 Jul 2012 20:48:29 +0100, Jake wrote:

I have an electronic GPS datalogging device that is designed to be
powered through a 9v battery. It runs the battery down in about 2 hours,
and because it goes through batteries so quickly, I have been looking
for solutions to make it last longer

I have had success in replacing the 9v battery with a 6 AA battery
holder with attached 9v clip and this powers the device for
significantly longer with 2500 mAh rechargeables giving 7.2v.

I have seen 8 AA battery clips available, that would give me 9.6v but I
am concerned about overvolting and damaging the device. Is the extra
0.6v likely to cause damage?

Put a dummy cell in the 8-pack and get 8.4v. Either buy on (Google) or
DIY with some dowel, a couple of pins and a piece of wire.

A typical silicon diode drops around 0.6V,

not really. at any current it can be up to a volt.

so a full 8-pack feeding the
logger via such a diode should give a pretty accurate 9V.

SteveW





--
To people who know nothing, anything is possible.
To people who know too much, it is a sad fact
that they know how little is really possible -
and how hard it is to achieve it.

On 08/07/2012 22:38, The Natural Philosopher wrote:
SteveW wrote:
On 08/07/2012 21:34, Bob Eager wrote:
On Sun, 08 Jul 2012 20:48:29 +0100, Jake wrote:

I have an electronic GPS datalogging device that is designed to be
powered through a 9v battery. It runs the battery down in about 2
hours,
and because it goes through batteries so quickly, I have been looking
for solutions to make it last longer

I have had success in replacing the 9v battery with a 6 AA battery
holder with attached 9v clip and this powers the device for
significantly longer with 2500 mAh rechargeables giving 7.2v.

I have seen 8 AA battery clips available, that would give me 9.6v but I
am concerned about overvolting and damaging the device. Is the extra
0.6v likely to cause damage?

Put a dummy cell in the 8-pack and get 8.4v. Either buy on (Google) or
DIY with some dowel, a couple of pins and a piece of wire.

A typical silicon diode drops around 0.6V,

not really. at any current it can be up to a volt.

The logger can't be taking much current, if it runs for 2 hours on a PP3.

SteveW

On 09/07/2012 21:17, SteveW wrote:
On 08/07/2012 22:38, The Natural Philosopher wrote:
SteveW wrote:
On 08/07/2012 21:34, Bob Eager wrote:
On Sun, 08 Jul 2012 20:48:29 +0100, Jake wrote:

I have an electronic GPS datalogging device that is designed to be
powered through a 9v battery. It runs the battery down in about 2
hours,
and because it goes through batteries so quickly, I have been
looking
for solutions to make it last longer

I have had success in replacing the 9v battery with a 6 AA battery
holder with attached 9v clip and this powers the device for
significantly longer with 2500 mAh rechargeables giving 7.2v.

I have seen 8 AA battery clips available, that would give me 9.6v
but I
am concerned about overvolting and damaging the device. Is the extra
0.6v likely to cause damage?

Put a dummy cell in the 8-pack and get 8.4v. Either buy on (Google) or
DIY with some dowel, a couple of pins and a piece of wire.

A typical silicon diode drops around 0.6V,

not really. at any current it can be up to a volt.

The logger can't be taking much current, if it runs for 2 hours on a PP3.

SteveW
What about a zena diode and a transistor to set the voltage.

On 09/07/2012 21:31, Gary wrote:
On 09/07/2012 21:17, SteveW wrote:
On 08/07/2012 22:38, The Natural Philosopher wrote:
SteveW wrote:
On 08/07/2012 21:34, Bob Eager wrote:
On Sun, 08 Jul 2012 20:48:29 +0100, Jake wrote:

I have an electronic GPS datalogging device that is designed to be
powered through a 9v battery. It runs the battery down in about 2
hours,
and because it goes through batteries so quickly, I have been
looking
for solutions to make it last longer

I have had success in replacing the 9v battery with a 6 AA battery
holder with attached 9v clip and this powers the device for
significantly longer with 2500 mAh rechargeables giving 7.2v.

I have seen 8 AA battery clips available, that would give me 9.6v
but I
am concerned about overvolting and damaging the device. Is the extra
0.6v likely to cause damage?

Put a dummy cell in the 8-pack and get 8.4v. Either buy on (Google) or
DIY with some dowel, a couple of pins and a piece of wire.

A typical silicon diode drops around 0.6V,

not really. at any current it can be up to a volt.

The logger can't be taking much current, if it runs for 2 hours on a PP3.

SteveW
What about a zena diode and a transistor to set the voltage.



....and what you get with one hand you are taking away with the other.

It is a bit nonsensical to add in an extra cell for more power and then
throw away most of that additional power dissipating in a diode or any
sort of linear regulator

In article , Gary
wrote:
On 09/07/2012 21:17, SteveW wrote:
On 08/07/2012 22:38, The Natural Philosopher wrote:
SteveW wrote:
On 08/07/2012 21:34, Bob Eager wrote:
On Sun, 08 Jul 2012 20:48:29 +0100, Jake wrote:

I have an electronic GPS datalogging device that is designed to be
powered through a 9v battery. It runs the battery down in about 2
hours, and because it goes through batteries so quickly, I have
been looking for solutions to make it last longer

I have had success in replacing the 9v battery with a 6 AA battery
holder with attached 9v clip and this powers the device for
significantly longer with 2500 mAh rechargeables giving 7.2v.

I have seen 8 AA battery clips available, that would give me 9.6v
but I am concerned about overvolting and damaging the device. Is
the extra 0.6v likely to cause damage?

Put a dummy cell in the 8-pack and get 8.4v. Either buy on (Google)
or DIY with some dowel, a couple of pins and a piece of wire.

A typical silicon diode drops around 0.6V,

not really. at any current it can be up to a volt.

The logger can't be taking much current, if it runs for 2 hours on a
PP3.

SteveW
What about a zena diode and a transistor to set the voltage.

or even a Zenner diode

--
From KT24

Using a RISC OS computer running v5.18

On Mon, 09 Jul 2012 22:42:43 +0100, charles wrote:

What about a zena diode and a transistor to set the voltage.

or even a Zenner diode

or even a zener diode B-)

--
Cheers
Dave.

On Mon, 09 Jul 2012 22:42:43 +0100, charles wrote:

In article , Gary
wrote:
On 09/07/2012 21:17, SteveW wrote:
On 08/07/2012 22:38, The Natural Philosopher wrote:
SteveW wrote:
On 08/07/2012 21:34, Bob Eager wrote:
On Sun, 08 Jul 2012 20:48:29 +0100, Jake wrote:

I have an electronic GPS datalogging device that is designed to
be powered through a 9v battery. It runs the battery down in
about 2 hours, and because it goes through batteries so quickly,
I have been looking for solutions to make it last longer

I have had success in replacing the 9v battery with a 6 AA
battery holder with attached 9v clip and this powers the device
for significantly longer with 2500 mAh rechargeables giving 7.2v.

I have seen 8 AA battery clips available, that would give me 9.6v
but I am concerned about overvolting and damaging the device. Is
the extra 0.6v likely to cause damage?

Put a dummy cell in the 8-pack and get 8.4v. Either buy on
(Google) or DIY with some dowel, a couple of pins and a piece of
wire.

A typical silicon diode drops around 0.6V,

not really. at any current it can be up to a volt.

The logger can't be taking much current, if it runs for 2 hours on a
PP3.

SteveW
What about a zena diode and a transistor to set the voltage.

or even a Zenner diode

Or even a Zener diode.

--
Use the BIG mirror service in the UK:
http://www.mirrorservice.org

*lightning protection* - a w_tom conductor

On 10/07/2012 01:12, Bob Eager wrote:
What about a zena diode and a transistor to set the voltage.

or even a Zenner diode

Or even a Zener diode.

Zener warrior diode?

charles wrote:
In article , Gary
wrote:
On 09/07/2012 21:17, SteveW wrote:
On 08/07/2012 22:38, The Natural Philosopher wrote:
SteveW wrote:
On 08/07/2012 21:34, Bob Eager wrote:
On Sun, 08 Jul 2012 20:48:29 +0100, Jake wrote:

I have an electronic GPS datalogging device that is designed to be
powered through a 9v battery. It runs the battery down in about 2
hours, and because it goes through batteries so quickly, I have
been looking for solutions to make it last longer

I have had success in replacing the 9v battery with a 6 AA battery
holder with attached 9v clip and this powers the device for
significantly longer with 2500 mAh rechargeables giving 7.2v.

I have seen 8 AA battery clips available, that would give me 9.6v
but I am concerned about overvolting and damaging the device. Is
the extra 0.6v likely to cause damage?
Put a dummy cell in the 8-pack and get 8.4v. Either buy on (Google)
or DIY with some dowel, a couple of pins and a piece of wire.
A typical silicon diode drops around 0.6V,
not really. at any current it can be up to a volt.
The logger can't be taking much current, if it runs for 2 hours on a
PP3.

SteveW
What about a zena diode and a transistor to set the voltage.

or even a Zenner diode

Or even a Zener diode?


--
To people who know nothing, anything is possible.
To people who know too much, it is a sad fact
that they know how little is really possible -
and how hard it is to achieve it.

Clive George wrote:
On 10/07/2012 01:12, Bob Eager wrote:
What about a zena diode and a transistor to set the voltage.

or even a Zenner diode

Or even a Zener diode.

Zener warrior diode?


Zena warrior, dude.


--
To people who know nothing, anything is possible.
To people who know too much, it is a sad fact
that they know how little is really possible -
and how hard it is to achieve it.

On Mon, 09 Jul 2012 23:10:57 +0100 (BST), Dave Liquorice wrote:

On Mon, 09 Jul 2012 22:42:43 +0100, charles wrote:

What about a zena diode and a transistor to set the voltage.

or even a Zenner diode

or even a zener diode B-)

I'll stick with Zena - it's the leather...
--
Peter.
The gods will stay away
whilst religions hold sway

On Tue, 10 Jul 2012 08:23:09 +0100, PeterC wrote:

On Mon, 09 Jul 2012 23:10:57 +0100 (BST), Dave Liquorice wrote:

On Mon, 09 Jul 2012 22:42:43 +0100, charles wrote:

What about a zena diode and a transistor to set the voltage.

or even a Zenner diode

or even a zener diode B-)

I'll stick with Zena - it's the leather...

Isn't it Xena?



--
Use the BIG mirror service in the UK:
http://www.mirrorservice.org

*lightning protection* - a w_tom conductor

"Bob Eager" wrote in message
...
On Tue, 10 Jul 2012 08:23:09 +0100, PeterC wrote:

8

I'll stick with Zena - it's the leather...

Isn't it Xena?

Only if you speel traditionally.

On 10 Jul 2012 08:01:21 GMT, Bob Eager wrote:

On Tue, 10 Jul 2012 08:23:09 +0100, PeterC wrote:

On Mon, 09 Jul 2012 23:10:57 +0100 (BST), Dave Liquorice wrote:

On Mon, 09 Jul 2012 22:42:43 +0100, charles wrote:

What about a zena diode and a transistor to set the voltage.

or even a Zenner diode

or even a zener diode B-)

I'll stick with Zena - it's the leather...

Isn't it Xena?

TBH I much prefer Gabrielle.-
Peter.
The gods will stay away
whilst religions hold sway

On 09/07/2012 22:42, charles wrote:
In article , Gary
wrote:
On 09/07/2012 21:17, SteveW wrote:
On 08/07/2012 22:38, The Natural Philosopher wrote:
SteveW wrote:
On 08/07/2012 21:34, Bob Eager wrote:
On Sun, 08 Jul 2012 20:48:29 +0100, Jake wrote:

I have an electronic GPS datalogging device that is designed to be
powered through a 9v battery. It runs the battery down in about 2
hours, and because it goes through batteries so quickly, I have
been looking for solutions to make it last longer

I have had success in replacing the 9v battery with a 6 AA battery
holder with attached 9v clip and this powers the device for
significantly longer with 2500 mAh rechargeables giving 7.2v.

I have seen 8 AA battery clips available, that would give me 9.6v
but I am concerned about overvolting and damaging the device. Is
the extra 0.6v likely to cause damage?
Put a dummy cell in the 8-pack and get 8.4v. Either buy on (Google)
or DIY with some dowel, a couple of pins and a piece of wire.
A typical silicon diode drops around 0.6V,
not really. at any current it can be up to a volt.
The logger can't be taking much current, if it runs for 2 hours on a
PP3.

SteveW
What about a zena diode and a transistor to set the voltage.
or even a Zenner diode

I think i prefer the original

http://en.wikipedia.org/wiki/Zener_diode

On 09/07/2012 22:42, charles wrote:
In article , Gary
wrote:
On 09/07/2012 21:17, SteveW wrote:
On 08/07/2012 22:38, The Natural Philosopher wrote:
SteveW wrote:
On 08/07/2012 21:34, Bob Eager wrote:
On Sun, 08 Jul 2012 20:48:29 +0100, Jake wrote:

I have an electronic GPS datalogging device that is designed to be
powered through a 9v battery. It runs the battery down in about 2
hours, and because it goes through batteries so quickly, I have
been looking for solutions to make it last longer

I have had success in replacing the 9v battery with a 6 AA battery
holder with attached 9v clip and this powers the device for
significantly longer with 2500 mAh rechargeables giving 7.2v.

I have seen 8 AA battery clips available, that would give me 9.6v
but I am concerned about overvolting and damaging the device. Is
the extra 0.6v likely to cause damage?
Put a dummy cell in the 8-pack and get 8.4v. Either buy on (Google)
or DIY with some dowel, a couple of pins and a piece of wire.
A typical silicon diode drops around 0.6V,
not really. at any current it can be up to a volt.
The logger can't be taking much current, if it runs for 2 hours on a
PP3.

SteveW
What about a zena diode and a transistor to set the voltage.
or even a Zenner diode

http://en.wikipedia.org/wiki/Zener_diode

In message , Gary
writes
On 09/07/2012 22:42, charles wrote:
In article , Gary
wrote:
On 09/07/2012 21:17, SteveW wrote:
On 08/07/2012 22:38, The Natural Philosopher wrote:
SteveW wrote:
On 08/07/2012 21:34, Bob Eager wrote:
On Sun, 08 Jul 2012 20:48:29 +0100, Jake wrote:

I have an electronic GPS datalogging device that is designed to be
powered through a 9v battery. It runs the battery down in about 2
hours, and because it goes through batteries so quickly, I have
been looking for solutions to make it last longer

I have had success in replacing the 9v battery with a 6 AA battery
holder with attached 9v clip and this powers the device for
significantly longer with 2500 mAh rechargeables giving 7.2v.

I have seen 8 AA battery clips available, that would give me 9.6v
but I am concerned about overvolting and damaging the device. Is
the extra 0.6v likely to cause damage?
Put a dummy cell in the 8-pack and get 8.4v. Either buy on (Google)
or DIY with some dowel, a couple of pins and a piece of wire.
A typical silicon diode drops around 0.6V,
not really. at any current it can be up to a volt.
The logger can't be taking much current, if it runs for 2 hours on a
PP3.

SteveW
What about a zena diode and a transistor to set the voltage.
or even a Zenner diode

http://en.wikipedia.org/wiki/Zener_diode

When the required voltage drop is small, it's rather difficult to use a
simple dropper resistor and shunt zener. You are better off with the
series diode (as suggested), 0.6V per for silicon, 0.2V for germanium
(if you can find one with sufficient current rating).
--
Ian