US2.5 Question

**grayven** · 10-12-2009, 06:51 PM

Originally Posted by Jedi-Loreen

In parallel? The 2AA battery packs aren't set up that way. I never heard of anyone using those batteries in parallel. Where did you hear that?

As far as I know, people are using the Trustfires if they are using a Lux V. Otherwise, people are using 6V.
3.7V is only enough to power the P4s or the red or amber LEDs.

Also add Lux III cyan. I have a Graflex with a US2.1 1 14500 running a Lux II cyan. Can't tell much difference on the brightness factor either.

**Jedi-Loreen** · 10-12-2009, 07:04 PM

Maybe he was just saying that they can be run in parallel.

**Kal El Rah** · 10-12-2009, 07:16 PM

That's exactly what I'm saying. here is an example of a 3.7v 15,600 mah pack:

http://www.batteryspace.com/li-ion18...lewithpcb.aspx

all the batts are paralleled.

end of confusion.

**ronzomi** · 10-16-2009, 09:05 AM

Hello All,

thanks for all the responses.
Yes I did mistype the Voltage of my trustfires. I know they are 3.7V, but they tend to put out 4.2V. A side note, one seems dead, so either the charger isn't working or the battery is toast. I have seen people runnning batteries in parallel before for other apps.. its a weird thought I know.

But back to my question(s), which I think was answered in there somewhere:
What is the input voltage I can put to the US 2.5 board? Should I go for the 4 x 1.5V setup and give only 6V out tothe board, or can I use rechargables that output 1.2V (giving 4.8V), or can I use a set of the trustfires? which in my case probably output about 8V?
What is the boards MAX input voltage?

Again, I do not want to damage the board before I get going and try to use it, that would be a very expensive hundred dollar mistake, and I have seen conversations tend to go both ways - some people doing it and some recommending to NOT do it.

I thought in the video I watched (link posted on this forum someplace by Nova?) they were using the trustfires to power the US2.5 board, vs using 4 x 1.5V alkalines (or other).
I was really trying to get an idea, based off of what I have read in the forums and seen in the videos, on whether or not driving the US2.5 board with the trustfires was a good idea or not? Sounds like it is not. So I will stick with trying to just go the 6V route, unless I get some positive feedback from everyone suggesting otherwise.

I think this is a great forum for idea exchange and that everyone brings a lot of their own personal experiences to the table.

As a ridiculous side note: was at Target the other day and they have X-mas stuff out already. They had a string of LED X-mas "lights" you could buy, they had Purple (okay, it was white with a purple shell). Just thought it funny, but could be a great way to pick up some different colored accent LEDs.

thanks ALL

**Strydur** · 10-16-2009, 09:22 AM

If you don't want to damage your board then just follow the voltage recommendations listed on the product description.

Battery input voltage:
Maximum for board = 9.6V
Minimum/Maximum for Luxeon 3, K2, P4 = 4.5V / 7.2V (6V recommended)
Minimum/Maximum for Luxeon 3,P4 Red/Amber = 4.8V / 6.0V
Minimum for Luxeon 5 = 7.2V
IMPORTANT! (be sure to use the correct voltage/power with corresponding LED type)

**ronzomi** · 10-16-2009, 03:17 PM

Thanks Tim,

I will.
Guess I was being a little paranoid and wanted to really make sure, since I had seen some back and forth on the forums regarding the input voltage for the board.

I am also liking the chrome finish on the Graflex replica parts, though I still can't get the replica red button switch to thread properly. I don't mind getting a correctly sized tap for that so I can do it right. Do you know the threading on that. I believe I sent a one off mail to you about it in the summer.

Thanks
Ron

**darthdan** · 10-17-2009, 07:29 AM

Ya know,

I'm guessing that the reason Ultra doesn't have a manual is just because they just don't feel like putting one together. Something nice for this site at least would be an unofficial Ultra 2.5 manual with everything we collectively know about it. Eandori, you look like you have it pretty down...

Plus if one was put together and the work was done for them, Ultra might just take it and include it from now on, helping the entire saber community. Think of it as charity work. For a bright shiny charity.