LED update, COB LED

With LEDs there is always something new just around the corner, and the new stuff creeps up very quickly. I had heard about COB LEDs but only started researching them last week. COB stands for Chip On Board LED. Rather than go into an explanation here I recommend that you have a look at this link: CLICK HERE.  That should give you an over view.

I was on ebay like a rabbit and came up with some COB strips 15cm long and advertised as being 6 watts. A pair was less than four pounds sterling (5 Euros). I ordered a pair of white and a pair of red to play with. the red ones came with a black aluminium frame and the white with a silver frame. The frames can be removed and swapped around or they can be used without the frames.

oneThe explanation to the picture as as follows: On the left is a frame that I have removed from the first COB which is a white COB despite being yellow when switched off. The second COB is also a white one with the frame still attached. The next two are red COBs with black frames. These can ba attached with any modern waterproof double sided tape. If they are to be used where the rain could get to them then I will take all the frames off and cover the soldered terminals with a blob of silicone seal.

twoThis blew my mind a little, I wired one of the reds up to a 12 volt battery and was amazed by how bright it is. Not only is it bright but it also gives out a good spread of light.

threeThis is one of the white ones and it is even brighter than the red. These are such a leap forward that I would imagine that using one of these as a DRL on the front of the bike will make you very noticeable. I do not believe that they use as much as 6 watts, but they seem to be very efficient. You could not use these as an aid to driving in the dark, they are not designed for that.

fourThe red one fits perfectly onto the rear of the standard ST pannier as an auxiliary brake light – it is far too bright to be a rear marker light. If you want it to function as both then a small 510 ohm resistor will dim it down enough to operate as a rear light and then bypassing the resistor restores it to full brightness.

I have considered fitting both the red ones into the ST standard rear light with one row coming on dim through a resistor, and then both rows coming on bright when the brakes are applied. I will look into that and report back.

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s