wquiles
Flashaholic
I just finished my third "D" size M*g LED project. The first two were U bin LIII in DD (L voltage bin) which drive anywhere from 700-1000mA depending on the type of battery (11000mAH NiMH are best!). I am using the O-sinks, Artic Alumina epoxy for the LED and a light coat of Artic Alumina (non-epoxy) between the O-sink and the M*g body.
This 3rd one is a V bin (T voltage bin) LV also DD but from 6 AA NiMH (2200mAH) using a 6AA-2D adapter (from CPF's, of course!) in a Black 2D body with an UCL lens (what else!).
When I first turned it on was like: holly cow! - this thing is REALLY bright /ubbthreads/images/graemlins/buttrock.gif. I have a nice "W" bin with a 1000mA downboy in a M4 with a Turbo Head and the LED adaptor and a KL6 modded for 1A and this "V" bin simply blows them away easily.
Worrying that something might be out of wack I decided to then measure the voltage/current reaching the LED: voltage at the LED was right around 6.9-7.0 volts and the current was about 1650-1700mA!. No wonder this thing was so bright - I am overdriving the heck out of it!. 7 volts times 1.7A is 11.9 watts !!! /ubbthreads/images/graemlins/naughty.gif
Now, from all of my reading on the Space Needle II (SNII), the SNII typically uses a a "W" or "X" bin LV direct driven by 3 CR123 cells, which is a nominal 9 volts or so. That should be even higher voltage and current (I though), so I felt safe with the 6xAA's until I saw the 1.7A draw.
No-load voltage at my pack was right around 8volts so I was not expecting this high current value. I did notice the body of the M*g near the head getting warm after 10-20 seconds of use, but I am afraid of running longer times at this point /ubbthreads/images/graemlins/str.gif
So how much current does the SNII draws on fresh cells? Why is my lower voltage pack delivering such a high current?
Am I about to kill my "V" LV by keeping it on a 1.7A draw? /ubbthreads/images/graemlins/mecry.gif
Will
This 3rd one is a V bin (T voltage bin) LV also DD but from 6 AA NiMH (2200mAH) using a 6AA-2D adapter (from CPF's, of course!) in a Black 2D body with an UCL lens (what else!).
When I first turned it on was like: holly cow! - this thing is REALLY bright /ubbthreads/images/graemlins/buttrock.gif. I have a nice "W" bin with a 1000mA downboy in a M4 with a Turbo Head and the LED adaptor and a KL6 modded for 1A and this "V" bin simply blows them away easily.
Worrying that something might be out of wack I decided to then measure the voltage/current reaching the LED: voltage at the LED was right around 6.9-7.0 volts and the current was about 1650-1700mA!. No wonder this thing was so bright - I am overdriving the heck out of it!. 7 volts times 1.7A is 11.9 watts !!! /ubbthreads/images/graemlins/naughty.gif
Now, from all of my reading on the Space Needle II (SNII), the SNII typically uses a a "W" or "X" bin LV direct driven by 3 CR123 cells, which is a nominal 9 volts or so. That should be even higher voltage and current (I though), so I felt safe with the 6xAA's until I saw the 1.7A draw.
No-load voltage at my pack was right around 8volts so I was not expecting this high current value. I did notice the body of the M*g near the head getting warm after 10-20 seconds of use, but I am afraid of running longer times at this point /ubbthreads/images/graemlins/str.gif
So how much current does the SNII draws on fresh cells? Why is my lower voltage pack delivering such a high current?
Am I about to kill my "V" LV by keeping it on a 1.7A draw? /ubbthreads/images/graemlins/mecry.gif
Will