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Hey, let's do a review and teardown
this lamp,
is a AR111
has a socket GU10
I think ,
is 7 watts
7 led 1 watt.
we will do the tests
and see how it is designed
this lamp.
a very good surface dissipation
dissipation ,
has this finned
who let
air flows
to refrigerate .
consists clearly
for 7 leds,
gu10 socket
turn it on and we 'll see
consumption and the power factor
in this lamp .
this is dangerous
have a fairly light beam concentrated
through the lens you have.
highly concentrated
have very little opening
this typical of this type of
spot lamps .
nearly 13 watts of consumption ,
more than I thought
a power factor
0.59 obviously not
power factor corrector .
now let's disarm
and see how this composite
internally.
Only three screws
have individual lenses
see LEDs
could if they wanted
disarm and leave
like this
you have
many more openness .
all LEDs in series .
here we can see internally
the driver .
unfortunately I can not follow disarming
because they would have to break
and remove the plastic part .
There is not much to see
this just in there.
what I do not like
is that the plate having
LEDs
This aluminum base
only contacts the
sink in this piece
and we have all the center
that is not making contact.
would be much better
thermal transfer
if this has only a small
hole for the wires .
but.
should work well .
voltage and current in the LEDs
the efficiency if the driver
output power and input power .
for that is what I did was to disconnect one of the wires coming from the
driver what was to leds
here I am connecting in series
ammeter
UNI-T 81b
to see
if vary the current as seen in these lamps
who have that ripple
currents generated a blink
imperceptible to the eye
but it would be nice
avoid
easily measured
current flows
through ammeter
and the lamp will
we will use the fluke
as voltmeter
and therefore less directly
in parallel
is all
I start with the scale of 10A
just in case
not to burn the fuse
which is 500 mA
10A is then ripped
for safety
now I
pretty good high current
423 mA
this as we had seen
almost 13W
23V and will make the calculations
then we have
point 423 by 23
point 61
10W on the LEDs
this gives us
1.42w by each LED
efficiency
76 % is not bad .
here we will see
noise or ripple
but that
I have to go to another level
I hope that the fuse does not burn
I burn not
we are exceeding the scale
because it is up to 400mA
and that above this
a straight line
but not shure is a good measurement
if somehow it's worth
and can verify opening lamp
highly concentrated
50 inches
as you will see
I think it looks
each of the squares is 1cm
not valid
but we will see with luxmeter
50 inches
power off
I only leave this
to see how we can generate these 50 inches
few lux
more useful measure is lummens
but it is much more difficult
it requires other instruments
generating
50 inches
8360 lux
this only serves to level comparative
to compare
I hand
5w Flashlight
would have to subtract 5 lux
ambient light
much closer
I am
50 inches
generating
4000 lux
not much more to see
two clarifications
the measurement is the only comparative luxmeter
and
when using the portable oscilloscope
we used to limit the scale
if it was not a good measurement
on the part of oscilloscope
because it was the limit
Scale
but I think not
justified connect another
Oscilloscope ( Rigol )
That was all
give me a like
we see the next video