Fixing a dead LED street light lamp.
Added 2019-09-15 04:04:51 +0000 UTCI was given a few LED retrofit SOX lamps at the recent Glasgow meet.
This one was faulty, so in this video I fix it.
Comments
Yeah, I recall pulling the PSU out of a Tandon (!) PC sometime in the 90’s and throwing the thing across the room because a capacitor on the rectifier output was charged to 450V or so...
Phil Collins
2019-09-17 21:30:14 +0000 UTCSwitch mode supplies have evolved significantly. Most are based around dedicated chips with minimal support components and are much less scary to work on than the very early ones.
Big Clive
2019-09-17 21:25:06 +0000 UTCThat was a nice revision of switch mode theory for me -last time I learned that it was all thyristors and discrete components
Phil Collins
2019-09-17 12:25:46 +0000 UTCGreat video this time. Really enjoy the sleuthing out with circuit explanation.
2019-09-17 11:26:14 +0000 UTCDealing with councils is lucrative. They don't really question costs, so the lamp cost would just be part of the story.
Big Clive
2019-09-16 04:15:15 +0000 UTCThe capacitance value read lower (20uF) than the intended value (22uF) in a basic LCR type tester. The ESR showed as similar to the replacement which is odd. I expected it to be higher. It makes me wonder if it was a bit too critical about the capacitance value or if I resolved the issue by disturbing/reflowing a bad solder joint.
Big Clive
2019-09-16 04:14:04 +0000 UTCWow! Those lamps are £62.45 inc VAT each!!
mikenco
2019-09-16 01:21:24 +0000 UTC"Pinholes Files", probably! :)
mikenco
2019-09-16 01:15:04 +0000 UTCCan you test/measure the failed capacitor?
MarcT
2019-09-15 23:07:23 +0000 UTCThey all seem to light together, so I think it's just to add a wider splash of light.
Big Clive
2019-09-15 17:18:40 +0000 UTCI wouldn’t be surprised if that second LED lamp you turned on, has an “extra” feature! I noticed that there were 4 SMD LEDs mounted (one pair at both ends) without lenses, apart from a drop of silicone.
Bo Holbo Rasmussen
2019-09-15 16:03:55 +0000 UTCThey also sell them as 'nut files' for guitar. Handy little things
David E. Blankenship
2019-09-15 12:41:54 +0000 UTCAh, I see you mention above that you have some of those hollow ones. The needles for clearing my desoldering station tips also have the crosshatch texture, which is quite effective
Kean
2019-09-15 09:06:30 +0000 UTCEbay search: hollow desoldering needles
Kean
2019-09-15 09:04:24 +0000 UTCWhen you mentioned that all street lamp gadgets were interesting I thought: If I were stinking rich I'd send you a damaged lamp pole, just for fun :) Might not fit on the workbench for a teardown though.
Nani Isobel
2019-09-15 07:24:53 +0000 UTCAt least they didn’t send you urethral sounds in place of desoldering needle’s...
Lostngone
2019-09-15 07:03:01 +0000 UTCUh-oh. I bought the "desoldering needles" as for PCB through holes, but they do seem to be welding tip cleaners. That means I'll get literally hundreds of comments pointing that out when I make it public on YouTube. They do work for cleaning solder out of through holes though.
Big Clive
2019-09-15 06:15:04 +0000 UTCI guess they're sort of right as you could use them to file out the remaining solder after you've removed the component. I can't see it being that great at doing that though. A similar set is sold for welding torch tip cleaning https://www.ebay.co.uk/itm/123902740782
Trevor
2019-09-15 05:57:01 +0000 UTCOoh! Patreon doesn't like stuff in command brackets. Not that I expected them to have a gold star feature.
Big Clive
2019-09-15 05:49:12 +0000 UTCBig Clive
2019-09-15 05:48:15 +0000 UTCI've got a set of the hollow needles, but these are being sold as for PCB through holes. https://www.ebay.co.uk/itm/123391634772
Big Clive
2019-09-15 05:47:48 +0000 UTCThose aren't desoldering needles. They're welding torch tip files. The desoldering needles are smooth like you were expecting and hollow.
Trevor
2019-09-15 05:10:59 +0000 UTCThanks Clive. What a great way to wake up... Email announcing a Big Clive video. (Do I get a gold star for the first comment...?)
Nuts 'n' Proud
2019-09-15 04:07:06 +0000 UTC
