The biggest LED COB panel yet! Voltage/current tests.

This thing is huge and bright. It runs at around 12V, but has no integrated current regulation. This means that if connected directly in a vehicle application the current could be very high and the voltage drop across the supply cable will be a factor in limiting the current.
The circuitry is basically four large parallel arrays of LEDs connected in series to make up roughly 12V combined forward voltage. I did some voltage/current tests as follows:-

10V 7mA 70mW
10.5V 170mA 1.8W
11V 790mA 8.7W
11.5V 1.72A 19.8W
12V 2.85A 34W
12.5V 4.2A 52W
12.8V 5.2A 66W Current Limit of bench supply.

As you can see form the voltage to current ratio the current increases significantly with a small voltage change.

A typical eBay search for this might be:-
https://www.ebay.com/sch/i.html?_from...

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