The next generation COB LED? (Radical new style of bare LED chip.)


  • Am Vor 9 Tage

    bigclivedotcombigclivedotcom

    Dauer: 20:55

    I'm not sure how I missed this. It's possibly because it's a secret that has been hiding underneath a phosphor loaded gel out of sight.
    Could this be the answer to the bond-wire problems in the early low voltage 20-100W LED modules? It's a new package of bare LED dice/chip that can literally be soldered onto a PCB as if it was a standard surface mount component. Just a very-very small one. It makes me wonder how they pick and place these and check the orientation before placing on the PCB. I guess the bare chip could be dabbed across some tiny contact pads to check if it emits light.
    When I tested this COB (Chip On Board) array with very limited current the LEDs all glowed uniformly, even at the point they were all just barely visible. The same can't be said for the older style low voltage module I also show in the video. It had a high number of defective LEDs exhibiting damage in the form of parallel resistance suggesting film damage. Possibly caused by the wire bonding process. When powered the older module would also extinguish whole rows of LEDs when pressure was applied to the busbars at the end of each series string.
    Just for fun I tested this LED with a 470nF capacitor in series to act as an external current limiter. The power indicated by the Hopi was 3.4W and the module put out a useful amount of light without getting warm, and would probably last decades with that very low current. Could be a useful way to switch a floodlight made with one of these between normal power and a low level ambient output.
    The contact block on the PCB which was clearly not bear-proof looks more like a push-in style for solid core wires. My attempt to treat it like a Wago terminal and "open the spring loaded contacts" just forced the folded contact strip apart and broke the little tab that is just a wedge that is supposed to part the sides just enough to get a wire back out again.
    I wonder how reliable this new type of LED panel will be over time. It's a foregone conclusion that the manufacturers will be pushing everything to its limits so thermal stresses may be an issue.
    As with all this style of driverless, or more accurately DOB (Driver On Board) LED module there is no smoothing. So the flicker at 100/120Hz is strong. They could design a COB to take an external capacitor or externally rectified and smoothed supply if they increased the number of LEDs in series to accommodate the higher smoothed voltage while still allowing a margin to drop across the active current limiting circuitry.
    I'm guessing that the new LED chips may be limited to Gallium Nitride technology at the moment, hence the use of phosphor to make the red and yellow COBs. The green ones seem to be available either with phosphor loaded gel or as bare green chips.
    Note that if converting a 110V COB to 220V by swapping the links the current will still be set higher, so the parallel resistor cluster may need to be adjusted. If converting a 220V COB to 110V the current will be lower than a stock 110V COB.
    If you enjoy these videos you can help support the channel with a dollar for coffee, cookies and random gadgets for disassembly at:-
    www.bigclive.com/coffee.htm
    This also keeps the channel independent of DE-film's advertising algorithms allowing it to be a bit more dangerous and naughty.

SamTheWurzelbacher
SamTheWurzelbacher

I've seen these 440 blue 'driverless' or integrated-driver style modules available from a few online retailers and in addition, many of these purveyors also sell cool and warm white light led modules. However, I have not seen any of these sellers offering led modules in the bright/deep/far red spectra. Is there some technical or practical reason why deep red leds are not offered in this style of module?

Vor 13 Stunden
SamTheWurzelbacher
SamTheWurzelbacher

+bigclivedotcom Thank you for the reply. I understand the point you are making, but I'm wondering whether it would be practical to drive a 50-watt deep red LED chip using circuitry similar to the 'driverless' white/blue LED COBs? Maybe because red LEDs use 33% less voltage than blue LEDs, they are more prone to damage by voltage fluctuations in these type of circuits? We have 120v line power in my home, but my Killawatt device shows a wide range of voltages throughout the day, anywhere from 110 volts to ~120v, and the voltage fluctuates even more when the clothes washer is on the same power circuit. For example, I've noticed that when I'm washing clothes, my COB garden lights will flicker significantly. I can only guess that a similarly-designed red LED chip w/ integrated driver would have a narrower range of tolerance for line voltage fluctuation. What do you think?

Vor 9 Stunden
bigclivedotcom
bigclivedotcom

The new flip chips seem to have been optimised for gallium nitride technology since it's the biggest market. (White LEDs.) I'm not sure if they'll do gallium arsenide in the same way.

Vor 12 Stunden
roadburp
roadburp

It needs to run doom or I won't fianace it.*

Vor Tag
D. Abbo
D. Abbo

The indication 220V on the LEDs always makes me a little nervous. Here in Germany the mains voltage is normally 235V. Oh! And at 2:40 I see, Your mains are at 245V!

Vor Tag
bigclivedotcom
bigclivedotcom

Yes. The 220V appears to be the Chinese voltage. This does result in more work for the driver circuitry.

Vor Tag
Ian Farquharson
Ian Farquharson

Could you please tell me if wired correctly are these lights safe? I won't hold it against you either way lol. Seem a great way to get a high performing light without the crazy prices companies are asking. ThankQ. TkEZ>UK

Vor 2 Tage
bigclivedotcom
bigclivedotcom

If the chunky heatsink they have to be mounted on is earthed/grounded and the cable used can handle the temperature then the light module may be fine if mounted in an area that it doesn't get directly touched. I can't tell you how reliable these are yet.

Vor 2 Tage
Ivan G-S
Ivan G-S

'I washed it with soap and water - as one does with leds' :D 6:45

Vor 2 Tage
Made 2 Hack
Made 2 Hack

Would you use a smoothing capacitor on the input to get rid of the flicker?

Vor 2 Tage
bigclivedotcom
bigclivedotcom

That would increase the smoothed voltage and put a lot of extra strain on the regulator.

Vor 2 Tage
petrol devo
petrol devo

I did the same thing changing a battery on a casio watch. They have that delicate quick snap on the metal snap so you wind up breaking the plastic tab on the watch module while installing the new battery. Now the watch is useless and i wasted 3 bucks on a battery...

Vor 3 Tage
BenPlays YT
BenPlays YT

"Thats a good start"😂😂

Vor 3 Tage
L1m3r
L1m3r

17:55 - Oh come on, they're probably using isolation transformers to poke around on the metal plate on their lap... they aren't idiots ;-)

Vor 3 Tage
Leo Leo
Leo Leo

when it shows no light u need to check if its infrared energy is coming through...your eyes cant see it ...it may our may not be but should still be check  Solar charging at night .....think about it ... use less get more... open up the mind ... a Flower is really not just A Flower....they are keys put them on the rings of your mind....

Vor 4 Tage
Will McGregor
Will McGregor

@bigclivedotcom do you have a way I can get in touch with you? Need to speak to you for some advice.

Vor 4 Tage
Joe Sammy
Joe Sammy

they can place chips with sound levitation now

Vor 4 Tage
Wilson Solt
Wilson Solt

18 minutes, I don't think legs work like that :p

Vor 5 Tage
Dingus E. Dow
Dingus E. Dow

Why your videos aren't in my feed?

Vor 5 Tage
bigclivedotcom
bigclivedotcom

Check you're still subscribed and click the bell next to the subscribe button to check notification settings.

Vor 5 Tage
condew
condew

It would be helpful to talk about what kind of heat-sink these sorts of LEDs require. I'd guess the board itself could dissipate about 5 watts, but 30 or 40 watts would require heat-sinking. I don't know how to figure the size of the heat-sink or whether it would need to be fan cooled.

Vor 5 Tage
condew
condew

+bigclivedotcom Looking at ebay listings for LED floodlights, I see it's not worth the trouble to work out the heat sink to turn an emitter into a powerful light -- unless, of course it's for artistic reasons. It looks like a sheet of aluminum about a foot square would do the job. Lamp fixtures were about 7"x9", with some shallow fins on the back that look more for show than function.

Vor 5 Tage
bigclivedotcom
bigclivedotcom

Fan cooling makes a huge difference, but convection cooling is viable. It does require a very big heatsink though. For an idea of size check out the style and dimensions of 50W LED floodlights.

Vor 5 Tage
telemetryz
telemetryz

Push harder... its thin plastic and cheap. Nice job.

Vor 5 Tage
Dennis McKee
Dennis McKee

Hi, thought I'd offer a bit of insight from a previous job. I worked for RCA Semiconductor and serviced Shinkawa wire bonders (www.shinkawa.com/en/products/wire_bonder/), among other neat stuff. These machines were used to ultrasonically weld the wires between the IC chip and package. I imagine that is how these LED packages are connected.

Vor 5 Tage
sei shin
sei shin

Can you try to photograph those white paint pcbs with different color filters to see if maybe infrared goes through and lets us see the traces?

Vor 5 Tage
bigclivedotcom
bigclivedotcom

That might be interesting to try.

Vor 5 Tage
Mumbo - Jumbo
Mumbo - Jumbo

I would say they are good dies...with well matched emitters. BUT, I hate the ridiculous size of the boards.

Vor 5 Tage
Okinawan Suidii
Okinawan Suidii

its not radical, it's just a cheap driverless cob

Vor 5 Tage
K.o.R
K.o.R

2:35 I see that Wilko trailing socket ;)

Vor 5 Tage
Mydas Murray
Mydas Murray

ok i retract my statement, this channel is far more technical than ashens. ignore my ignorance

Vor 5 Tage
Amin EnJan
Amin EnJan

5:23 Grab A Pen To Duddle With!

Vor 6 Tage
Pappa Lazarou
Pappa Lazarou

Almost 162k views....? Clive hits the big time... Clive's changed....

Vor 6 Tage
bigclivedotcom
bigclivedotcom

It's very random. Some videos just catch people's attention.

Vor 6 Tage
Mawk Theone
Mawk Theone

Hey Clive, if you're in Ireland hit me up and I'll give you a tour of my led factory. Let you do some wirebonding

Vor 6 Tage
bigclivedotcom
bigclivedotcom

I'll keep that in mind. What sort of stuff do you make?

Vor 6 Tage
Jessica Anderson
Jessica Anderson

Nice video 👌

Vor 6 Tage
CreamyCornCob
CreamyCornCob

I dont have any LED's on my Cob, please take your video down.

Vor 6 Tage
Kevin Bauer
Kevin Bauer

I would expect the incident that left a skid mark on the gentleman's trays also have left a skid mark in his trousers.

Vor 6 Tage
bigclivedotcom
bigclivedotcom

It would take a huge electrical boom to leave a skidmark in my pants.

Vor 6 Tage
Ramon Bril
Ramon Bril

Clive, how would you go about correcting that flicker? It irritates me, but I love these chips. In the botanical garden we use these with great succes for difficult plants. And yes I always earth my lamps

Vor 6 Tage
Ramon Bril
Ramon Bril

+bigclivedotcom These seem to me the best artificial lighting, which generally is better than natural sunlight. It's weird. I grow nasty plants that love to die, minature orchids species and such. I think there is little output of atp (batteries of the cell) flicker noticeable for the plant cells, so they don't mind. My consciousness however, does mind.

Vor 4 Tage
bigclivedotcom
bigclivedotcom

I wonder if the flicker has an effect on the plant growth

Vor 6 Tage
Mark Gigiel
Mark Gigiel

If it wasn't for the flicker, they seem great.

Vor 6 Tage
Mark Gigiel
Mark Gigiel

They attach them with a tiny drop of superglue and then melt the solder and bond them with hot air or sometimes wave solder depending on the components. They have had this technology for a very long time. I have a hot air bonding machine with a temperature controlled chimney and a tiny vacuum cup for component removal, as well as a handheld hot air soldering iron. It takes good eyes and a steady hand.

Vor 6 Tage
Mark Gigiel
Mark Gigiel

You just push the solid wire in. It's only push to release.

Vor 6 Tage
Wael Sadek
Wael Sadek

Not sure how the outside connectors switch between 110 and 220 for led series parallel thing , I wish if there was some drawing for that....

Vor 6 Tage
bigclivedotcom
bigclivedotcom

It may also require the current sense resistors to be adjusted.

Vor 6 Tage
KnightsWithoutATable
KnightsWithoutATable

They are pick and placed. I have seen components this size in electronics before and they are surprisingly low cost parts when you order boards in the hundreds or thousands with them.

Vor 6 Tage
jlucasound
jlucasound

CLIVE!! YOU ROCK!! :-)

Vor 7 Tage
Paul George
Paul George

I'm honestly interested to see a teardown and explanation video for oled lighting.

Vor 7 Tage
Long Plays
Long Plays

Interesting. I bought a similar thing (different form factor) a few months ago to experiment on since it was very cheap, but then I realized that it takes main voltage. It's been sitting in a box since. I might dig it out after this video :)

Vor 7 Tage
LegacyMicro
LegacyMicro

Thanks for answering a question I've had for some time. Which is . Why are they so much cheaper than the traditional modules? Now I wonder if the AC circuit can be removed and drive them with a Dc driver.... Hmmm...

Vor 7 Tage
bigclivedotcom
bigclivedotcom

These are optimised for mass production fast. But there's also the slight risk that we might be the guinea pigs for their prototypes.

Vor 7 Tage
tripzero
tripzero

i wonder if they have COBs made like that without the integrated driver.

Vor 7 Tage
bigclivedotcom
bigclivedotcom

Yes they have. They're based on the older 10 by 10 LED grids, but now have the LEDs mounted directly like the centre of this panel. Typical voltage is around 35V when run on a current limited supply matched to the modules power rating.

Vor 7 Tage
Shanee Vanstone
Shanee Vanstone

Lovely video. Can you remove the flicker from these?

Vor 7 Tage
bigclivedotcom
bigclivedotcom

Their simple design makes that difficult. I made another video on an earlier version where I did add a capacitor, but it puts extra stress on the regulator circuitry.

Vor 7 Tage
John Conrad
John Conrad

Thanks for sharing. after watching your video I bought one of those with white LED's .

Vor 7 Tage
Mark Penrice
Mark Penrice

That's very cool, despite obviously not being cool at all...

Vor 7 Tage
John Rehwinkel
John Rehwinkel

Apparently one of the resistors near the IC is a NTC one used to monitor temperature. I looked at the 110V ones on eBay and saw they indeed had the other two links fitted to put the two banks of LEDs in parallel. I wonder if the current sense resistors are different too so the LED current is higher for the parallel arrangement.

Vor 7 Tage
bigclivedotcom
bigclivedotcom

I'll have to see if there are any clear pictures on eBay to see what the resistor values are.

Vor 7 Tage
Kaizer Power Electronics
Kaizer Power Electronics

Horrible drivers on those boards, flickering will be noticeable at almost any situation.

Vor 7 Tage
Tim Stroud
Tim Stroud

Is there an easyplace to splicd in a smoothing circuit?

Vor 7 Tage
theskett
theskett

I found this interesting, answers some of our questions :-) http://www.led-professional.com/resources-1/articles/3-pad-led-flip-chip-cob Also, AliExpress has similar for ~$4; "50W Hight Powr Grwoth COB LED AC-220V 110V No need driver Full Spectrum 380-840nm/white/Natural White/warm white"

Vor 7 Tage
PinkysPain
PinkysPain

There's a lot of new 12V COBs which seem to be flip-chip/CSP as well, dunno if they balance as well as these high voltage arrays, but should be a little safer at least.

Vor 7 Tage
Harrison
Harrison

Hey Clive I was wondering if you could do a video some day about hooking computers up to UPS systems, namely line interactive ones, and lots of the mixed information out on how such a thing would "clean" computers power and how much of a difference such a thing actually makes to operation. I am seeing lots of hearsay and mixed information online on the matter and I'm just a laymen, but it seems like such a thing is blown out of proportion and many of the protections needed are already built into PC power supply units and other devices as well.

Vor 7 Tage
Gold Leaf
Gold Leaf

My 50W led flood light driver was die after 9 month. When looking for led driver replacement i found so many new driverless led flood light. So many type until dont know which one ori and which one copy.

Vor 7 Tage
MOTO MOUSE
MOTO MOUSE

hahahaha this is awesome! you destroyed the thing after 2 minutes XD

Vor 7 Tage
Ryan Smith
Ryan Smith

Hi big Clive. I imagine you might now see this but I could do with some advice. On my aquarium I am running a rather large LED light bar. It’s runs at 12v dc at 3 amps. Sadly the intensity isn’t good enough. Would u recommend either getting a 15v or higher power supply or getting a great amp rating 12v power supply. Hope you are someone else can help

Vor 7 Tage
Ryan Smith
Ryan Smith

bigclivedotcom thanks for that. I will do some mutilmetre testing first to determine what voltage and current draw there is. And then see if there any current regulating chips within the LED bar. It just seems very under run compared to similar size ones I have of the same brand.

Vor 7 Tage
bigclivedotcom
bigclivedotcom

If the unit is rated for a specific current it may have built in regulation. Using a higher voltage risks over-driving the LEDs and shortening their life or putting extra burden on the regulator if one is used. It might be worth checking that your power supply is actually putting out 12V and if it is then it may be time to add some extra lighting.

Vor 7 Tage
Mechotronic
Mechotronic

Any idea if these are eye safe? Do they make UV? Also any idea what color would be good for general bench lighting?

Vor 7 Tage
bigclivedotcom
bigclivedotcom

They use blue LEDs to stimulate phosphors to create the other colours needed to make white light. There will be no UV. The flicker could make these unpleasant for some people.

Vor 7 Tage
checksignalcable no
checksignalcable no

its waste of time, and they will die fast, so you will spend more on replacing them eventually than buying lets say vero 29 d for 17€ with 10 years of warranty, lol.

Vor 7 Tage
Leeroy
Leeroy

it can't be smaller then 0201, right?

Vor 7 Tage
bigclivedotcom
bigclivedotcom

It is smaller.

Vor 7 Tage
tasmedic
tasmedic

Clive's been splicing armoured cables during his day job. Hence the ham fisted wrecking of the frittery stuff....

Vor 7 Tage
Arno nümuss
Arno nümuss

Maybe they use indium to solder at low temperature. It would be interesting if someone could analyse the material.

Vor 8 Tage
gile
gile

Great video man

Vor 8 Tage
dtiydr
dtiydr

These types of LED is the very cheapest there is, they are so cheap that you can hardly not even get them you self because they are menat for the industry only so they can make even cheaper high wattage LEDs like this but of course as usual not cheaper for the customer one bit. These are just made to produce light by the simplest way possible, no conformity of the light fex what so ever and so on.

Vor 8 Tage
warlockmohl
warlockmohl

was that manila paper?.....bold move lol

Vor 8 Tage
Rob Taylor
Rob Taylor

Ah.... I found the link for the QuickTest here http://www.newark.com/cliff-electronic-components/cl1850/electrical-tester/dp/68C8457?ost=quicktest&selectedCategoryId&categoryId=800000005787

Vor 8 Tage
Devour C
Devour C

he is the bob ross of electronics

Vor 8 Tage
Rob Taylor
Rob Taylor

Can anyone provide a link on where to get the AC Plug w/ quick test connections ?

Vor 8 Tage
Nick Bird
Nick Bird

Hi I did a search on Ebay and had no luck, however on Amazon just typed in " quick mains tester " then scroll down. Atb nick

Vor 5 Tage
mavos1211
mavos1211

Great video Clive thanks. Do you think these style/design are going to be commonplace moving forward and do you prefer them?

Vor 8 Tage
bigclivedotcom
bigclivedotcom

Time will tell. I hope they at least do version with smoothing and higher numbers of LEDs to compensate for the higher voltage.

Vor 8 Tage
Steel PC Gaming
Steel PC Gaming

how to get ahold of clive

Vor 8 Tage
George Dennison
George Dennison

I stumbled upon the low voltage DC LEDs 4-5 years ago, and built a pair of 30W work lights with cooling fans, and a AC-DC power supply. They are still working. A year or so, later, I went back to eBay to buy more, and begin to replace my old floros in my shop, (I priced a box of 4' tubes, and choked on the price. It had been 20 years since I had bought any, I'd been using used bulbs I got from a local grocery store which was replacing all bulbs every six months.) I discovered the 'next gen' COB LEDs, with the integrated AC-DC power supply. I bought a full watt range, (30W to 150W), in 240v AC and 120v AC versions, from two different eBay vendors. Some of the LEDs were identical from the two vendors, but about half were a different design. I was excited about going completely LED, and being able to see, again. It took me weeks to brow beat the vendors into providing me a 'suggested' operating temp. When I got the suggested temp, I was able to test different heat sinks until I could get a stable operating temp. I installed 5-6 120v AC LEDs in my shop, as tests. Within six months every one of the LEDs has failed. They lasted different lengths of time, some failed over the Summer, but others failed during the Winter, in an unheated shop, which makes me question an operating temp. One of the eBay vendors promised a three year warranty, but I haven't got around to testing the promise. Do you have any speculation regarding the failures? Should I experiment more with operating temp, and heat sinks? Or am I looking at an over current issue/ gold wire problem? (one vendor was boastful about 'their' design using gold conductors rather than aluminum, being the newest, superior design). I desperately need to get some lighting, but am hesitant to buy more, soon to burn out, LEDs. Any suggestions, recommendations? Me« very much a beginner in electronics. Thanks, for any suggestions, or thoughts.

Vor 8 Tage
George Dennison
George Dennison

Was afraid you would say something like that. Well, I bought a bunch of auto and non-auto 12v COBs. Originally planned on using them as equipment mounted lighting; guess I'll focus on those, instead to get some illumination back. Thanks, anyway. I seem to remember you did a vid or two about the assembled COB worklights. Have you heard anything about their reliability being better than the bare LEDs?

Vor 5 Tage
bigclivedotcom
bigclivedotcom

The modules are improving over time. The biggest issue is the manufacturers over driving the LEDs.

Vor 8 Tage
Dan Hard
Dan Hard

easy to see now why they were celling the other COBB lights for almost nothing because they were about to be out of date and no one is going to want them

Vor 8 Tage
Nelson Di Salvatore
Nelson Di Salvatore

can you show it working?

Vor 8 Tage
Alex C
Alex C

One device is trying to say danger Will Robinson and than the next (LEDs) tries to cause seizures.

Vor 8 Tage
bledlbledlbledl
bledlbledlbledl

If it's anything like the LED bulb I bought (the one that lasted about a month past its warranty and then died), what'll die is that 8-pin chip, and it'll turn out that the chip has had its part number scraped off at the factory to prevent anyone replacing it

Vor 8 Tage
mark layton
mark layton

You broke it .... bloody hell

Vor 8 Tage
[Whatever name goes here]
[Whatever name goes here]

9:25 sorry but I cannot unsee the weird man with raised legs...

Vor 8 Tage
Sean Mangan
Sean Mangan

Hello Clive. I'm requesting a subject for future video. I just heard about LEP flashlights It would love to know more. Thank you for all your educational videos.

Vor 8 Tage
andreleger2001
andreleger2001

Excellent

Vor 8 Tage
Patchuchan
Patchuchan

I wonder if it would be possible add a smoothing cap to get rid of the flicker?

Vor 8 Tage
bigclivedotcom
bigclivedotcom

It raises the voltage and results in higher heat dissipation from the control circuitry.

Vor 8 Tage
Roger Froud
Roger Froud

Is it possible that this the chip you have? That code you think is the date code just happens to be a constant current driver that is perhaps controlling the transistor? http://www.digchip.com/datasheets/parts/datasheet/413/LB1931T-pdf.php

Vor 8 Tage
Mshojat
Mshojat

First time In my life that I've seen —or at least noticed— a 0-Ohm "resistor". I think that I was never told about these in college; I guess it's not a hard concept to grasp though. What sort of applications are these LED arrays used for?

Vor 8 Tage
Charles Williamson
Charles Williamson

:-)

Vor 8 Tage
C B
C B

I found myself with one of these somehow, no idea how to power it, thanks for your vid, very informative and enjoyable,

Vor 8 Tage
Rico Swave
Rico Swave

It's wafffer thin...

Vor 8 Tage
randy lehahee
randy lehahee

The flickery display of the hopi is alright alright

Vor 8 Tage
Mike Guitar
Mike Guitar

Thanks Matthew McConaughey

Vor 8 Tage
Antonio Claudio Michael
Antonio Claudio Michael

Very intresting Big Clive

Vor 8 Tage
Antonio Claudio Michael
Antonio Claudio Michael

Intriguing

Vor 8 Tage
Simon Wilkinson
Simon Wilkinson

Clive not sure if this is the chip http://search.datasheetcatalog.net/key/1089B

Vor 8 Tage
Scot Harkins
Scot Harkins

Dude, you need a USB microscope.

Vor 8 Tage
Sai Skanda
Sai Skanda

" washed it with soap and water , as one does with LEDs" 😁😝 6:47

Vor 8 Tage
David Richard
David Richard

How about scraping off the gel of the bridge rectifier and solder on a capacitor to smooth out the blinking? I think I will have to try that and see if it works if I ever order a bunch because I really dislike that flickering. What do you think about this idea?

Vor 8 Tage
bigclivedotcom
bigclivedotcom

I demonstrated that with another COB. The higher voltage across the capacitor results in higher dissipation from the regulation circuitry.

Vor 8 Tage
Mephistahpheles
Mephistahpheles

@1:26 Connect the wires...you don't need the screwdriver at all. Just push the wires in. (Use the screwdriver to release the wire. Gently increase pressure WHILE pulling on the wire. The wire will come free long before you put excessive pressure on the connector.) It's even easier than you thought.

Vor 8 Tage
Stuart McCloud
Stuart McCloud

Hey Clive, what is that 240v tester doodab with the 3 terminal wire connectors and the big red snap over switch lid? I need one of those in my life. Cheers, loving your work!

Vor 8 Tage
bigclivedotcom
bigclivedotcom

Cliff quick test.

Vor 8 Tage
Andreas Meyer
Andreas Meyer

A nice article about COB LED constraction http://www.led-professional.com/resources-1/articles/3-pad-led-flip-chip-cob

Vor 8 Tage
Jamal Cole
Jamal Cole

Big Clive! When will you start doing par readings?

Vor 8 Tage
Pepe Lange
Pepe Lange

If You want to avoid a flickering display dail down the shutterspeed of your camera to something less that 100/sec or even 50/sec. done

Vor 8 Tage
NivagSwerdna
NivagSwerdna

Broken at @1:35. Good job. Perhaps you should test it's ability to grow things?

Vor 8 Tage
Stephen Eyles
Stephen Eyles

Dirty LEDs? Just pop them in the dishwasher, Economy program, then dry them in the microwave for a few seconds... Guaranteed to never work again but it should be fun watching them 'cook'!! :-D

Vor 8 Tage
Roger Smith
Roger Smith

Well .... If the "hydroponics posse" means what I assume it does... I can't say I'm shocked that they are less than cautious with their lab experiments!! ✌

Vor 8 Tage
The Mechanical Philosopher
The Mechanical Philosopher

Gold Bond medicated wires!

Vor 8 Tage
Mike Guitar
Mike Guitar

Thanks Johnny

Vor 8 Tage
MrMegaPussyPlayer
MrMegaPussyPlayer

20:37 I only know ... if you have a big bag of those leds and sneeze ... you got a problem.

Vor 8 Tage
Galbi 3000
Galbi 3000

ARGH THE FLICKERING! I AM ANNOYED!!! #sarcasm

Vor 8 Tage
matt franklin
matt franklin

I have been running a dozen of these for 6 months and they are amazing for growing, not to mention extremely reliable.They have ran 18 hours a day for over 6 months without a single problem. I would never buy led's that needed separate drivers ever again. It makes no sense, these chips are only 10.00 a piece. Stalks the size of my thumb in 2 months , phenomenal. You just twist the end of the wire and slide it gently into the each hole of the connector. It's literally that simple, you don't poke them with anything like you did, they naturally grip the wire all by themselves and they unhook just as easy. It's no wonder you broke the connector, wtf we're you doing? Your a smart guy, but that was just idiotic. All you had to do was slide 2 bare wires gently into each connector and watch as it lit up perfectly. Lmao.

Vor 8 Tage
BearTwigs
BearTwigs

The question I have is... What do these cheap chinese LEDs do as far as RF spectrum pollution. With noise floors getting higher and higher every year, these are a major issue according to a lot of folks..

Vor 8 Tage
bigclivedotcom
bigclivedotcom

These ones probably have a soft turn on for each half wave. Much quieter than units with switching drivers.

Vor 8 Tage
The Fake Russian
The Fake Russian

If there are idiots out there probing things sat on metal with 240v live probes you really shouldn't tell them to stop. Natural selection has a tough enough time getting rid of the idiots without them being given warnings. The "That's a great idea, hold my beer .....A few weeks later ............. Dearly beloved we are gathered here today ............" thing isn't heard often enough these days.

Vor 8 Tage

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