Mk1 Hope LED internal photos

[nixie]

I had my hope led apart tonight to repair a dodgy connection. Thought I might as well do some internal shots while it was apart. Hopefully someone will find them useful.

They are can currently be found on my flickr account here;

http://www.flickr.com/photos/27324215@N02/sets/72157608595326024/

 

[herulach]

is that a vision 2? Picture 5 looks like some kind of quad die LED,would have expected it to be a cree/p4

 

[LukeA]

I haven't seen that LED before. I wonder if it's a clone of the MC-E? Or something else?

 

[nixie]

Its what is now the vision 2. Its the 300lm version, one of the very early ones as it has the old type battery connectors. I thought it used Luxeon LEDs at this stage. The new version is 480lm I think.

I'm hoping at some point I can swap the LEDs out for something with either more power, or better efficiency.

 

[Szemhazai]

Can you measure driver output voltage and current ?

Some other version of this lamp :

The led on the right looks to have a bad case of humidity rash. The epoxy has reacted badly with moisture and fractured the epoxy, probably during initial manufacture, I would complain to Hope. The led looks to be a LEDENGIN 5 watt led so you maybe able to buy a replacement if they dont come good
__________________
Cheers
WeLight

http://www.ledengin.com/ledengin_products.html

 

[nixie]

Should be able to. Have reassembled the light now but will be messing with a battery pack at some point so can try then. Will try an get measurements at each of the 3 settings.

 

[nixie]

Whats the best way to measure current on a circuit like this? AM I going to need to break the circuit so the current passes through the multi meter (for example by unsoldering the connection to the first LED)?

 

[nixie]

Right, the driver seems to put out 700ma on high, 270ish on medium and 140 on low. Voltage is 7.4V. See my other thread for plans to put 2 cree mc-e leds in here