Re: [CAD_CAM_EDM_DRO] Digital camera battery pack

Peter Smith wrote:

> I tested the output of the mains adapter, which was exactly 6.5 volts,
> I picked up a 6 volt sealed lead acid battery (6.5 volts fully charged) from
> a local electrical dealer for about £8.00, Its a YUSA NP4-6,

Hi Peter, thanks for your comment.

My mains adapter is 6.7VDC for the Olympus D600L. Stated to be
6.5 V. I can run the camera on 4-1.5V photo grade batteries,
however. I can't use 1.2v NiCD but can use the NiMH for some
reason. I guess they put out higher current.

I've found a plug to fit the camera so I'm going for a gel cell
of 6vdc. That would be 6.6v like the Yuasa. I'd rather have a
gelcell on my belt than one with liquid sulfuric in it, although
I've never had my Yuasa B38-6A leak on my motorcycle and it is
not even tied down.

That problem of the Olympus finished, I also have another problem
for an Epson camera. This one uses 4-1.5vdc batteries also and
the charger is 6vdc at 1.5A output (so labeled). What I don't
know is how sensitive these cameras are to overvoltage, say 6.5v
instead of 6 volt. I have no way of finding out if the camera
has a voltage limiter circuit inside. I'd hate to burn up a $400
camera. It is certainly easy to make up a little voltage limiter
with a Zener diode and resistor, but I'm wondering if it is worth
the effort? The cost of partswould be miniscule, of course, so
it is probably better to be safe.

Regards,

JerryK