Re: LED Security camera heat question

[jmj1492@xxxxxxx]

Most LEDs require 20 ma to operate (x 30 = 600 ma) plus the camera
requirements.  The total wattage is likely somewhere around 7 watts -
the equivalent of a nighlight.


none wrote:
> 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.