Checking out a large COB array.

The row that lights last at low voltage could just be one bad diode, as they are all in a series + parallel arrangement. The 'cool white' ones are easier to see through - it's 4 banks in parallel, rather than 28 series sets.

Andy Brown

Using an iron for pre-heating pcbs is a good idea. I use a 250W glass-topped hot-plate when reworking SMD - came from Good Will for £2 (less than $3) and works pretty well

Gordo

We've always had Kit Kats, but only a small range. There are a few more these days though. Peanut, chunky and plain chocolate versions.

Big Clive

I'm in the US and I have never heard of Oreo Thins till you mentioned them before. I wonder if Oreos in the UK are are doing what KitKats in Japan did.

Kadah

I am seriously considering buying four of these for my garage. 12V power supply, 2W 4.7 ohm resistor for each to limit current/forward voltage. Hm. or maybe one of those cheap bare-board adjustable power supplies set at 20V? Run them 2s2p? That would be 10V across each.

09Klr650

It's so specialised that I doubt it would be available to the layman. It's a phosphor loaded gel where the phosphor ratio, density and thickness are all a factor in the final colour.

Big Clive

Looks as though it'd be bit overkill in most vehicles - maybe as lights inside the roof of a truck body or something. But amsuing to see you chop the thing in half.

Moz in Oz

Does anyone know what that yellow gel is they use on COBs? Can it be purchased?

Lostngone

I was thinking about replacing a halogen bulb in a torchere floor lamp with one of these. They need a bit of heat sinking.

Shades of the French Revolution there :)

Phil Collins

Yeah!

Bill Browning

That was fun! The chopping was unexpectedly cool. Always something great on this channel. Thanks Clive!

Michael Thompson

Yeah chop it up :)

Frank