What is inside an LED "starter"

[Andrew Gabriel]

On 04/03/2019 00:43, Roger Hayter wrote:

I don't know when the last public DC mains supply was replaced, but I
tend to think that AC/DC TVs were actually designed to work on DC mains
up to the early 1950s at least.

There were DC mains supplies to the late 1970's in areas like London's
West End which were used by the theatres for arc lamps. Apparently also
used for many lift and escalator motors. University College London used
it too, and not just in their (at the time) Bloomsbury Theatre. We had
220VDC mains sockets in the physics labs, which I used for a carbon arc
lamp at one point. (The sockets were like 15A round pin sockets, but the
earth pin was nearer to the live pins.) By 1983 (and probably a year or
two before), the DC mains supply had ceased and it was generated locally
on site instead.

Of course, DC supply was something specialised at this point, and not
provided to standard consumers - only those with a specific requirement.

--
Andrew

 

[Commander Kinsey]

On Fri, 01 Mar 2019 04:23:22 -0000, Diesel <nobody@haph.org> wrote:

"Commander Kinsey" <CFKinsey@military.org.jp
newsp.zxki3ch6wdg98l@desktop-ga2mpl8.lan Thu, 21 Feb 2019 15:39:02
GMT in alt.home.repair, wrote:

On Thu, 21 Feb 2019 02:45:48 -0000, Diesel <nobody@haph.org
wrote:

"William Gothberg" <"William Gothberg"@internet.co.is
newsp.zuaephp9o5piw3@desktop-ga2mpl8.lan Wed, 19 Dec 2018
20:47:31 GMT in alt.home.repair, wrote:

Not expensive enough to bother. I often buy brand new caps on
Ebay for peanuts (just got a couple to repair 2 switched mode
PSUs - one for a monitor and one for an insect zapper). Used
ones wouldn't be worth much.

Ahh. What is your preferred desoldering method? Have you used any
of the new SMP quikchip stuff yet?

I ain't a pro solderer. I do nowt special. I can desolder and
resolder surface mount LEDs though.

That's touching. I can desolder two usb ports in under a minute without
damaging the board or the ports. I could have gotten the other two off
the donor board within another 30-45 seconds or so.

As I said I ain't a pro. I probably get my soldering iron out 5 times a year to repair something. I have changed an ethernet port on a laptop that my neighbour rather clumsily forced a USB plug into.

 

[Diesel]

"Commander Kinsey" <CFKinsey@military.org.jp>
newsp.zyar0dgswdg98l@desktop-ga2mpl8.lan Thu, 07 Mar 2019 19:49:15
GMT in alt.home.repair, wrote:

On Fri, 01 Mar 2019 04:23:22 -0000, Diesel <nobody@haph.org
wrote:

"Commander Kinsey" <CFKinsey@military.org.jp
newsp.zxki3ch6wdg98l@desktop-ga2mpl8.lan Thu, 21 Feb 2019
15:39:02 GMT in alt.home.repair, wrote:

On Thu, 21 Feb 2019 02:45:48 -0000, Diesel <nobody@haph.org
wrote:

"William Gothberg" <"William Gothberg"@internet.co.is
newsp.zuaephp9o5piw3@desktop-ga2mpl8.lan Wed, 19 Dec 2018
20:47:31 GMT in alt.home.repair, wrote:

Not expensive enough to bother. I often buy brand new caps on
Ebay for peanuts (just got a couple to repair 2 switched mode
PSUs - one for a monitor and one for an insect zapper). Used
ones wouldn't be worth much.

Ahh. What is your preferred desoldering method? Have you used
any of the new SMP quikchip stuff yet?

I ain't a pro solderer. I do nowt special. I can desolder and
resolder surface mount LEDs though.

That's touching. I can desolder two usb ports in under a minute
without damaging the board or the ports. I could have gotten the
other two off the donor board within another 30-45 seconds or so.

As I said I ain't a pro. I probably get my soldering iron out 5
times a year to repair something. I have changed an ethernet port
on a laptop that my neighbour rather clumsily forced a USB plug
into.

I've got a few of them, myself. I'm pretty decent with a desoldering
pump and desolder wick (can even make my own); recently ordered and
experimented with fastchip (quikchip clone) and it's fantastic for
quickly removing SMD as well as thru hole components. It's how I was
able to drop those usb ports off that board so fast.

If you're using it to quickly remove multiple pin heat sensitive
thru-port components, you'll have a bit of a mess left behind to
clean up before you can install new components (if you plan to). It
leaves behind a little solder in the holes and stuff. Nothing you
can't remove easily enough though.

If you have no idea what I'm writing about, search youtube for
quikchip or fastchip video demonstration. It's not difficult to use
the stuff, but due to it's tendency to break easily, I'd suggest you
acquire the stuff in rod form, not the little coil you have to gently
uncoil to use. And be prepared to spend some cash. 4.5ft of fastchip
in rod form is over $20 US. And that's without flux or anything else,
just the alloy.


--
Got kleptomania?? Take something for it!

 

[Peeler]

On Fri, 8 Mar 2019 05:19:12 -0000 (UTC), Diesel, another mentally deficient,
troll-feeding, senile idiot, driveled:

I've got a few of them, myself. I'm pretty decent with a desoldering

You aren't decent at all when it comes to sucking off the unwashed Scottish
wanker, you twisted diesel!