If I thought the COB LED panel was big the last time, then this is now officially the biggest I've ever seen. It's based on a solid panel of aluminium with a PCB layer laminated on. The COB aspect (Chips On Board) indicates the way the bare LED chips are bonded directly to the PCB layer and bond wires attached between the chip contacts and the PCB. The board has a dam of silicone piped round the desired outline and is then flooded with a layer of phosphor loaded silicone gel to protect the LEDs and convert the blue light from the chips to white.
This panel has a massive 600 LED chips on it in a 30 by 20 array.
The LEDs are wired in rows of 30 parallel chips in series groups of four rows to make up the desired 12V rating. There's no current limiting so any voltage fluctuation will result in wide intensity variation and any cable resistance will have an effect on the current through the panel.
The LEDs are not well matched on this panel so there will be a wide current difference between the chips and it could damage them if run at high current.
The PCB bus bars are arranged to provide as equal a resistive path to all LEDs as possible to ensure that track resistance does not cause an intensity variation.
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This panel has a massive 600 LED chips on it in a 30 by 20 array.
The LEDs are wired in rows of 30 parallel chips in series groups of four rows to make up the desired 12V rating. There's no current limiting so any voltage fluctuation will result in wide intensity variation and any cable resistance will have an effect on the current through the panel.
The LEDs are not well matched on this panel so there will be a wide current difference between the chips and it could damage them if run at high current.
The PCB bus bars are arranged to provide as equal a resistive path to all LEDs as possible to ensure that track resistance does not cause an intensity variation.
If you enjoy these videos you can help support the channel with a dollar for coffee, cookies and random gadgets for disassembly at:-
http://www.bigclive.com/coffee.htm
This also keeps the channel independent of YouTube's advertising algorithms allowing it to be a bit more dangerous and naughty.
watching this on an HDR monitor makes me want some goggles myself
At what point does it become a quantum board lol
MADE IN CHNA, that's why its shite
When they say 200W, I'm figuring this is the 'equivalent' brightness to an incandescent lamp of 200W. At 4 minutes 31, you are showing 3.01A @ 11.89V = 35.8W x 5.5 (as a rough efficiency multiplication factor comparing circa 600 small LED's running at a reasonably modest 1/17th of a watt (circa 14mA each) to an incandescent) gets you to 196 Watts.
Wtf this is beast
I want to put something like these in old Mole Richardson 1K light fixtures. Zip/Softlights. Why can’t LED’s make that happen yet?!
the big panels still give softer shadows than smaller sources
Hello, have you tried put them all leds in series and put under the sunlight to see how many volts you get?
Tip: RPP Nigel Cheese technology
EVEN BIGGER!!!!
200 watts at 12 volts is 16 amps… that's too many amps…
first time YT has been so bright i squinted 😛
i want to make a lightbox with a cutout logo in plywood infront of it.
I want it to be very bright because i will have a color plexiglas 3mm between the glas and the cutout.
which do you recommend?
its a closed box 20x30cm and its closed so no aircooling 😁
I'm getting Electroboom vibes
If they were green it would be a still frame of the matrix background. 🙂
you still havnet hit a million subz yet thsts suck youll get there soon brother soon
If my LEDs are not matched and I still want to wire them together in such numbers – is there a reasonable way to get it done without adjusting single LEDs?