Re: LED Security camera heat question

["none" <fsm2k2@xxxxxxxxx>]

Thanks for the reply.

The cameras themselves state:
500mA, 12V
<= 680 mW

The power adapters are: 12V, 1Amp
I tested the output and they are around 12.8 V or so on output.

I found a 500mA, 12V adapter and popped it in (a cheap one mind you,
which had to be set at 9V to generate 12.4 V).  Sure enough, it ran
warm, but not scalding hot.
I'm looking at the cameras, and thinking something is odd.  My
knowledge of electricity is minimal, but it seems to me that 500mA *
12V = 6 Watts, which is an insane amount of power for such a tiny
camera.  It is, afterall, a 30 LED CMOS camera.

So I'm thinking perhaps the voltage is wrong?

B Fuhrmann wrote:
> 600ma at what voltage?  At 12 Volts, that would be 7.2 watts.  That is
> similar to the power consumed by the smaller 120V Christmas tree lights (the
> ones common before the mini lights became popular in the 60s.
> Those would burn your skin.  A larger case that transfers the heat to the
> air better will stay cooler.  If this is a small case, I would expect it to
> get hot (in our terms, still not hot for electronics).
>
> --
> Bill Fuhrmann
>
> <fsm2k2> wrote ...
> > Hi,
> > I've got some wireless CMOS 30-LED security camera's wired in my home,
> > and have noticed they run very hot.  After running only a minute or so,
> > you cannot put your hand on it for more than 20 seconds.
> >
> > I'm reading conflicting information about these cameras, that heat
> > generation is in fact normal, but this seems hard to believe.  For a
> > camera that claims to consume 600mA's of power, it seems quite hot
> > whether running in the day or night.