Hi,

To conserve space would I be able to use a 12v power source to power 2
pinhole cameras which require 6v each?

The cameras have a mini DC input which then attaches to a battery clip
on the battery pack

I've attached a small diagram of what I'm attempting to help
illustrate my question.

Should I plug in both cameras first then attach the battery?

Regards,

Sean

In article , wrote:
Hi,

To conserve space would I be able to use a 12v power source to power 2
pinhole cameras which require 6v each?

The cameras have a mini DC input which then attaches to a battery clip
on the battery pack

I've attached a small diagram of what I'm attempting to help
illustrate my question.

attached to what?

Should I plug in both cameras first then attach the battery?

if the cameras use a wired video connection don't connect them in series.
one will likely see 12V and the other none. otherwise it may be practical to
connect them is series...


the best solution is probably some sort of DC-DC converter to turn the 12V
into 6V.

-

Bye.
Jasen

schreef in bericht
...
Hi,

To conserve space would I be able to use a 12v power source to power 2
pinhole cameras which require 6v each?

The cameras have a mini DC input which then attaches to a battery clip
on the battery pack

I've attached a small diagram of what I'm attempting to help
illustrate my question.

Should I plug in both cameras first then attach the battery?

Regards,

Sean

Don't connect them in series, the equation you think of works fine with 2
equal loads. The load of the cameras will "never" be equal you will most
likely destroy one and immediatly after that the other.
Why don't you use some kind of Voltage Regulator??? If you use the LM317 you
can make almost every Voltage needed.

On Sat, 13 Aug 2005 00:04:36 GMT,
wrote:

Hi,

To conserve space would I be able to use a 12v power source to power 2
pinhole cameras which require 6v each?

The cameras have a mini DC input which then attaches to a battery clip
on the battery pack

I've attached a small diagram of what I'm attempting to help
illustrate my question.

---
Your attachment didn't come through since this is a text-only
newsgroup. You can post binaries to
alt.binaries.schematics.electronic.
---

Should I plug in both cameras first then attach the battery?

---
Don't even _think_ about it.

There are basically two ways to do what you want; the first being to
use a linear regulator (something like an LM317) to drop the 12V
down to 6V. If the load of the two cameras is too great for a
single LM317 to handle, you could use a separate LM317 for each
camera, assuming the load from a single camera isn't too great.

Here's a link to the LM317 data sheet so you can check it out:

http://cache.national.com/ds/LM/LM117.pdf

The other way is to use a buck regulator, which is a much better way
because it won't be wasting all the power the LM317(s) will.

Here's a link if you want to roll your own:

http://www.national.com/appinfo/power/webench/


--
John Fields
Professional Circuit Designer

On Sat, 13 Aug 2005 10:42:47 -0500, John Fields
wrote:

On Sat, 13 Aug 2005 00:04:36 GMT,
wrote:

Hi,

To conserve space would I be able to use a 12v power source to power 2
pinhole cameras which require 6v each?

The cameras have a mini DC input which then attaches to a battery clip
on the battery pack

I've attached a small diagram of what I'm attempting to help
illustrate my question.

---
Your attachment didn't come through since this is a text-only
newsgroup. You can post binaries to
alt.binaries.schematics.electronic.
---

Should I plug in both cameras first then attach the battery?

---
Don't even _think_ about it.

There are basically two ways to do what you want; the first being to
use a linear regulator (something like an LM317) to drop the 12V
down to 6V. If the load of the two cameras is too great for a
single LM317 to handle, you could use a separate LM317 for each
camera, assuming the load from a single camera isn't too great.

Here's a link to the LM317 data sheet so you can check it out:

http://cache.national.com/ds/LM/LM117.pdf

The other way is to use a buck regulator, which is a much better way
because it won't be wasting all the power the LM317(s) will.

Here's a link if you want to roll your own:

http://www.national.com/appinfo/power/webench/

--
John Fields
Professional Circuit Designer

On Sat, 13 Aug 2005 10:42:47 -0500, John Fields
wrote:

On Sat, 13 Aug 2005 00:04:36 GMT,
wrote:

Hi,

To conserve space would I be able to use a 12v power source to power 2
pinhole cameras which require 6v each?

The cameras have a mini DC input which then attaches to a battery clip
on the battery pack

I've attached a small diagram of what I'm attempting to help
illustrate my question.

---
Your attachment didn't come through since this is a text-only
newsgroup. You can post binaries to
alt.binaries.schematics.electronic.
---

Should I plug in both cameras first then attach the battery?

---
Don't even _think_ about it.

There are basically two ways to do what you want; the first being to
use a linear regulator (something like an LM317) to drop the 12V
down to 6V. If the load of the two cameras is too great for a
single LM317 to handle, you could use a separate LM317 for each
camera, assuming the load from a single camera isn't too great.

Here's a link to the LM317 data sheet so you can check it out:

http://cache.national.com/ds/LM/LM117.pdf

The other way is to use a buck regulator, which is a much better way
because it won't be wasting all the power the LM317(s) will.

Here's a link if you want to roll your own:

http://www.national.com/appinfo/power/webench/


Thanks for the information, I will check this out.

Regards,
Sean

On Sat, 13 Aug 2005 15:11:50 -0500, John Fields
wrote:

On Sat, 13 Aug 2005 10:42:47 -0500, John Fields
wrote:

On Sat, 13 Aug 2005 00:04:36 GMT,
wrote:

Hi,

To conserve space would I be able to use a 12v power source to power 2
pinhole cameras which require 6v each?

The cameras have a mini DC input which then attaches to a battery clip
on the battery pack

I've attached a small diagram of what I'm attempting to help
illustrate my question.

---
Your attachment didn't come through since this is a text-only
newsgroup. You can post binaries to
alt.binaries.schematics.electronic.
---

Should I plug in both cameras first then attach the battery?

---
Don't even _think_ about it.

There are basically two ways to do what you want; the first being to
use a linear regulator (something like an LM317) to drop the 12V
down to 6V. If the load of the two cameras is too great for a
single LM317 to handle, you could use a separate LM317 for each
camera, assuming the load from a single camera isn't too great.

Here's a link to the LM317 data sheet so you can check it out:

http://cache.national.com/ds/LM/LM117.pdf

The other way is to use a buck regulator, which is a much better way
because it won't be wasting all the power the LM317(s) will.

Here's a link if you want to roll your own:

http://www.national.com/appinfo/power/webench/

--
John Fields
Professional Circuit Designer