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Ah - scratch that theory then. I figured it had something to do with bandgap voltage or something.
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The efficiency will hopefully improve, but I think the basic electrical characteristics (Vf of between 7V and 8V) are probably not going to change for these diodes.
And Ben.. I think that's mostly what *these* diodes are already. I heard through the grapevine that >520nm IS available.. but at an extreme price increase.
What we will see is that as the technology improves, price will come down on the >520's, and these 'low wavelength' diodes will simply vanish as the manufacturing processes improve and they simply quit showing up in batches.
Well, for now. These are still just "failed prototypes", essentially. I am sure the finished products would require a standard of... I dunno, 4V? It seems that the lower the wavelength, the more voltage is required, with blue being at 4.5V and red being at 3.5V, so green would probably be at around 4V. If my simplistic model of the technology works
Ah - scratch that theory then. I figured it had something to do with bandgap voltage or something.
There are plenty of 8.4 V and 9.6V NIMH battery packs for RC cars. There a little bulky, so you might want to keep them external and just make a cord from the laser that plugs into the battery in your pocket. Otherwise you'll need a big host.
I can't see any appeal to using a NIMH power source, given that our concerns relate to needing a higher voltage supply.