Posted by shanegue on May 6, 2006, 9:13 am
Hi, Ive bought a wireless camera and birdbox and basically i want to
power the camera wit solar power. I have a small solar panel which
outputs 3v 200mA, 6v 100mA, 9v 50ma, and 12v 50mA.
The camera says it runs on DC 8V 220mW?
I have attahed it to an adapter, and it runs at 9v, but when I attach
it to the solar panel at 9v nothing happens? Do I need to get the solar
panel to charge a battery and run the camera from that? Can I attach a
battery to be charged AND the camera at the same time? Im confused,
please help!!!
Posted by William P.N. Smith on May 6, 2006, 9:52 am
shanegue@googlemail.com wrote:
>small solar panel which
>outputs 3v 200mA, 6v 100mA, 9v 50ma, and 12v 50mA.
>The camera says it runs on DC 8V 220mW?
I think you need to check your numbers, I can't imagine that your
camera runs on 220mW (maybe that's the output power of the radio in
it?), which is under 3 mA at 9V.
Your solar panel is rated at 600 mW, which probably isn't going to
work. You really need to characterize your load properly, what are
the exact specs on the camera? Have you got a pointer to the camera
online somewhere?
Posted by samc on May 6, 2006, 4:25 pm
shanegue@googlemail.com wrote:
> Hi, Ive bought a wireless camera and birdbox and basically i want to
> power the camera wit solar power. I have a small solar panel which
> outputs 3v 200mA, 6v 100mA, 9v 50ma, and 12v 50mA.
> The camera says it runs on DC 8V 220mW?
> I have attahed it to an adapter, and it runs at 9v, but when I attach
> it to the solar panel at 9v nothing happens? Do I need to get the solar
> panel to charge a battery and run the camera from that? Can I attach a
> battery to be charged AND the camera at the same time? Im confused,
> please help!!!
>
ok .. things think about
9v at 50 ma = 9x0.050 = 0.45w i.e... 450mw this is the panels
thearetical output in strong sun light . so in over cast weather the
output is much less .
a panels voltage varys with not just with light levels but also with
loading .
because the cam probably has a 5v voltage regulator on board the higher
the voltage you feed it the more power it consumes (it just dumps the
extra unneeded as heat) you could try dropping the voltage down to 6v
setting because the panel might put out more than 6v (8-9v) .
hope this helps regards, samc.
>outputs 3v 200mA, 6v 100mA, 9v 50ma, and 12v 50mA.
>The camera says it runs on DC 8V 220mW?