- Dec 30, 2016
I see a lot of talk about amperage this and amperage that but what about voltage, can a few watt blue laser be ran off 3.6 volts ?
With a boost driver, yes. Many lasers you see here run on a single 18650 for 445nm and 405nm. You just need something that can slightly increase the voltage the diode sees for ideal operation.Let me rephrase my question, could the laser diode that is in a cheap Chinese host run on 3.6 volts with a driver change ?
The laser is now running on 7.4 volts.....
The operating voltage of laser diodes generally depends upon their semiconductor bandgap.I'm not sure about a blue laser but the 800mw Oclaro laser I have uses 3.6 and the 800mw 980 uses the same.
Yeah. As long as you have a boost driver, it should work. Though, that Ni-Cd might not give you great performance compared to some of the li-ion batteries. A single good 18650 will have more capacity with better current characteristics.The reason I asked the question is I'm looking to power the most powerful blue laser diode/driver/boost I can get/afford and power it with a custom host that houses a battery which is rated at Ni-Cd 3.6V 1.8Ah, Is this possible ?
Where are you getting that from? All Li-Ion batteries are going to perform a bit better than any Nickel Cells in both load performance and capacity. Nickel cells are mainly just safer and can be cheaper.But it should be light years above 2 each 16340 3.7v 2800mAh batteries I would think ?
It does depend upon the resistance vs temp curve of the diode itself. Basically, the diode has to maintain a resistance that won't let too much current through from the battery's supply voltage.I had mentioned this not long ago and was told this is not correct. But I know I have read this before. I would definitely like our upper level members to clarify this.
I can believe that The very light Li-Ion batteries (2 cells) on the right have more capacity than the Ni-Cd battery (3 cells) on the left ? Is that correct ?!?Where are you getting that from? All Li-Ion batteries are going to perform a bit better than any Nickel Cells in both load performance and capacity. Nickel cells are mainly just safer and can be cheaper.
You said you were going to use a 1.8Ah battery. How is that supposed to be better than 2×2800mAh (5.6Ah)? Granted, you do need good cells to trust that rating, and it's probably a good bit lower.
No that would be 5600 mAh (mega Amp hours) with the Ni-Cd being 1.8 Amp hours
Li- cells are the most energy dense battery chemistry that's widely available. They carry more energy per volume and mass than any other battery you can get. They're usually at least twice a Ni-Cd in energy density.I can believe that The very light Li-Ion batteries (2 cells) on the right have more capacity than the Ni-Cd battery (3 cells) on the left ? Is that correct ?!?
How can that be ?