Robert Swinney wrote:
So Jim, what are the electronics for? I sorta figured the new LEDs used
(only) appropriate dropping resistors like older conventional LEDs.

Bob Swinney


Likely it's a dc to dc converter of some sort, much more efficient than
wasting power in a dropping resistor. I'm amazed at the kind of
efficiencies I see claimed in chip manufacturer's ads these days.

Jim just confirmed what I've been saying for the last ten years or so,
repair of consumer electronics has become more of a mechanical job than
an electronic troubleshooting one. The parts themselves hardly ever fail
these days, it's mainly "loose disconnections" that keep the parts from
doing their intended tasks.

Jeff

--
Jeffry Wisnia

(W1BSV + Brass Rat '57 EE)

"As long as there are final exams, there will be prayer in public
schools"



"jim rozen" wrote in message
...

My underwater kinetics 2AAA flashlight died. I had it on my
keychain, and it took a pretty hard knock I guess when I dropped
the keys the other day.

The SMT inductor broke off its solder pads, and a tiny widget
busted off the top of one of the transistors.

I soldered the inductor back on, and after a bit of head
scratching I decided that the tall, dark colored, grainy
cylidrical thing that was epoxied to the SMT transitor was
probably a heatsink. So I simply used 5 minute epoxy
to glue it back together at the break.

I also gussied the other SMT devices up with a few dabs
of epoxy as well, because the original dabs were a bit
on the spare side.

Jim


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