Sorry. It's another dooby themed video

I was inspired to try dooby-ing a LED lamp so I purchased the cheapest I could find from the local Bunnings (an Osram 13w LED ECO Stick - AUD$2).  It's plastic all round, consumes 12.5w and gets ripping hot (75°C on the outside - the plastic stinks as well).  It puts out a fair bit of yellow light, I suspect it won't last long (not the 12000 hours quoted on the box). I was surprised at the circuitry, it looks to be driving the 17 LED string with a pair of 3 pin chips (J2101S)in parallel.  I can find a little data on these, there is just the one current sense resistor (33 ohm) so i'll have to change them and see if I can reduce the light output.  It's otherwise fairly similar to the Poundland lamps - except the capacitor is on the top of the board, 105°C rated.  There's nothing under the aluminium backed PCB except the current limiting / fusible resistor on one of the wires.

Not sure if you have seen this article Clave or my fellow Petreons on led's it is a very interesting read for anyone new to the led game . Here is the link bellow .https://hackaday.com/2019/02/05/what-happened-to-the-100000-hour-led-bulbs/

Lamp manufacturer: We need to suppress Big Clive. He threatens our bottom line.

Personally I like a sense of deja vu as that means I am learning and revisiting reinforces the learning. The more comfortable I am with what I am seeing and hearing makes it more satisfying. No apologies needed for good stuff. Not all viewers are electronics experts but still want to learn. Btw, I like the Dooby approach. It is also solid way to learn effect of changing values.

The lamps with separate driver PCB can often have the LED PCB unscrewed or prised out of the heatsink cup. But the wire length may be short inside, usually to the middle push-in pin on the base. The series capacitor may work with those lamps if they don't have switching supplies.

Big Clive

You have 340v going across the leds. So when you drop the voltage you only have 170v. Which would be way dimmer led if they would light at all. So I think the leds have to be changed at a minimum.

Alex Taylor

I love the LED’s. It is a very comfortable thing to practice real world electronics on. I learned so much about power supplies 2 years ago it was great. Looking forward to seeing how the technology changes next year.

Alex Taylor

LMAO "kink palpulator" !! That is great

...Yes We Can...

Whippet Gas

Learn something new every time. Busy doing the opposite in Oz, converting light to power. Saving working PV from landfill as it removed from damaged roofing, often due to minor power loss.

No apology, BC. These things are flooding the market and one of the selling points of LED lighting, aside from the more light/Watt thing is that they are long-lasting. And now the corporations have found a way to get around that last one. I wonder if there is a business to be made buying these lamps in bulk, changing the circuits as needed, and reselling them as "long life" lamps. You could even be up-front about what you'd done to "fix" them.

Peter Laws

Same here i love all this bulb hacking i now have hacked all the led bulbs in my house thanks to Clive.

Was wondering if you had a variac. Since that chip controls the current, would it run at the same current if you dropped the voltage to a 120? They could make one bulb that would work as long as that chip could supply the current. Its 5am and I am tired please excuse this question if it's dumb.

Cleveland Prescott

Well, I'm a regular, and I'm not sick at all!! BRING ME MOARRRRRRRR!!!!!

Chuck Kirchner

Ah, I didn't spot that.

Big Clive

Clive clipping coupons, calories, and cilowtts😘

Cerity

Clive, the 14 watt LED lamps I got from the dollar store have 24 LED’s in series with a 12 ohm and a 20 ohm resistor in parallel on the regulator. So I removed the 12 ohm resistor. I now have some bright 5 watt LED lamps. Once again thanks for the great video showing how to do this hack. And you never bore me!

I'm tempted to add a high value pot and see how low the current can go.

Big Clive

I found that I could squish them gently in a small vice fitted with soft rubber jaws (the type Aldi sell with a clamp for table top use- the rubber jaws are perfect for this task) It gets easier after you have done a couple, and you just snip out the lowest value of the two sense resistors.

Mike Hughes

Not bored with these videos, lots of good ideas.

Kevin Hardisty

I am also not fed up of these videos. Really interesting and I plan on hacking a few too.

The 5 led bulb seems to have been made in May of 2022. Glad to know your time machine is working well.

Mark Trombley

The Y-6 and Y-8 part of the board number looks like the power rating (6 and 8 watts).

Paul Slootman

The day after you did the last video showing how to do this, I bought one of those poundland bulbs and did exactly what you have just shown- it worked- 2.3 w from 6.3w so the following day I bought one for each lamp in the house, hacked them all and now I don't expect to replace them for ever. Your video is my datestamp for their longevity.

Mike Hughes

I've gone on a bit of an LED buying spree here in Australia. It looks like a lot of the LEDs sold here are designed in such a way where the top PCB only has LEDs on it, with the driving circuitry behind a metal lid that is almost impossible to get off without damaging anything. But, at least, most of the 'cheap' store-brand bulbs are easy to resistor mod.

Jurek Biel

Thanks for showing the spudger seal method, I've done the same thing for some years now but newbies will benefit greatly. Bone-handles knives with a thin end tip work an absolute treat for opening stuff, and often totally without damage. I have a couple of early examples of the linear regulated lamps, l must dig them out of the junk and take a look.

Anton

The Kinky Palculator.

Anton

Keep ‘em coming! We moved into a new house this time last year, and the first thing we did was replace all of the ceiling lamps with led models - one that seemed to be good quality from home depot here in the US. One just failed - almost exactly one year to the day. Going to open it up to assess the quality per your recent analyses.

Matt Hessinger

Love all of the bulb videos, they're awesome!

Brendan Perkins

You have to love the pinkulator.

Dave Davies

They will grill the LEDs...then WE shall resist! "The dark fire will not avail you, flame of Udun!" (Just for you playing along at home Mike has compared a Balrog to a LED bulb manufacturer)

Michael Thompson

That's the magic of sleep: I want make a new animated series featuring Clive's tools. Pink Calculator, Vise Knowledge, X-Ray V1.0, everyone. I understand Jackson Public is free...

Michael Thompson

Gone are the days when we sold light bulbs up to 250 watts.

Jeremy Travis

I do the same. Always take one apart, it never gets old. I was thinking of adding a pot on the "globe" and turn it into a "built in bulb dimmer" just because.... Using a plastic shaft and knob Pot/VR.

You have been busy:) very nice!

Mike Weijmans

Don’t apologize. These videos are excellent. You would never think all of these different aspects that go into a simple light. Now whenever I go to buy bulbs, I always open one to count the number of LEDs to see how hard they are being pushed. Keep up the great work Clive.

c

Extra Trashy. My love life in 2 words. hardy-har-har ..

It does work, but by using subtractive filtering it reduces the intensity. Standard translucent PLA looks OK, but I have some transparent red PLA on order to test.

Big Clive

Would it be possible to 3d print a small cap in coloured translucent PLA that would fit over the LED chip to colour the light (instead of changing the LED chip itself)? I would think a multicoloured crystal bulb could look pretty good.

Ross Robertson

I'm going to bed. I'll save this when I wake up. It's nap time for me. My schedule is where it wants to be, but I'm eating well. LOL

Michael Thompson

Thinking the same thing lol

John Carr

Go to bed Clive. 😴💤

Benjamin Esterson