Welcome to Laser Pointer Forums - discuss green laser pointers, blue laser pointers, and all types of lasers

LPF Donation via Stripe | LPF Donation - Other Methods

Links below open in new window

ArcticMyst Security by Avery

Mohgasm Clearout sale

andrewb

andrewb

0
Joined
Sep 7, 2011
Messages
144
Points
28
Put me down for:
10 x Black focus adapters ($20)
10 x Benboost ($40)
1 x 5.6mm Kryton ($23)
3 x 9mm Kryton ($69)

If the focus adapters and/or benboosts aren't available in the above quantities, I'll take as many as you have, and just make up the difference by adding more 5.6mm Krytons to make it > $150.

PM sent.

Thanks!
Andy
 





cheech226

cheech226

0
Joined
Jun 25, 2011
Messages
1,481
Points
63
Does anyone in the us want to sell me a ben boost and a copper c6 sink?
Can the current be "easily" reset on the ben boost?
 
Last edited:
Mohrenberg

Mohrenberg

0
Joined
Aug 30, 2008
Messages
6,891
Points
83
Just have to replace the set resistors

These are all leftovers from a large order which was canceled, that's why they are preset.
 
Last edited:
C

cmendoza

0
Joined
Dec 26, 2007
Messages
137
Points
18
Mohrenberg, This is a great deal on the Benboosts for us. Thanks!

Does anyone know of a link or schematic on how to set the current with the resistors? I looked in the BenBoost thread but didn't make it through all 51 pages.

Thanks again!
 
benmwv

benmwv

0
Joined
Sep 10, 2010
Messages
1,380
Points
48
All the info you need is right in the first post. Formula for calculating them and a list of combinations you can use with no math involved!
 
C

cmendoza

0
Joined
Dec 26, 2007
Messages
137
Points
18
Ben, thanks! Since these are 1.25A I assume there are 2 R30 resistors. I don't see a value for one R30. Will it work with one and what would that current be?

Elsewhere Moh lists possible currents for the BenBoost Mini not listed on the first post, including 100ma. Do you know which resistors would need to be used for 100ma.

Thanks again!
 
benmwv

benmwv

0
Joined
Sep 10, 2010
Messages
1,380
Points
48
If you look right above that table you will see this formula:

Current is calculated by: I (in Amps) = 0.19 / Rset (in Ohms)

So 0.19/0.3 = 0.633A, but i'm not sure if matt used two R30 for them.

Rearranging the formula, .19/.1 = 1.9 ohms for 100ma out.

Also there are two spots so dont forget to calculate parsllel resistance if you use two resistors. You just do 1/R for all you resistors, add up the results then do 1/x again for the total. Or use an online calc for it.
 
C

cmendoza

0
Joined
Dec 26, 2007
Messages
137
Points
18
benmwv,
Got it. Thanks! It's been awhile since I did this in Physics class.
I appreciate your help!
 
LaZeRz

LaZeRz

0
Joined
Feb 19, 2011
Messages
2,549
Points
63
9 benboosts
3 5.6mm krytons
1 9mm kryton
3 copper c6 heatsinks
1 flashlight holster
1 black anno c6 heatsink
1 plain alum c6 heatsink
2 black ano focus adapters
1 un-ano'd focus adapter

That comes to 152 dollars plus shipping. I'll get TonyT to pm you his area code so shipping can be calculated. Hoping it doesn't come out too high.
 
Mohrenberg

Mohrenberg

0
Joined
Aug 30, 2008
Messages
6,891
Points
83
Took me a bit but everything is out.
Back to work tomorrow, but will be back home on Monday.
I'm going to lower the minimum order to $50 and move stuff onto Mohgasm.com sometime over the weekend... Still got a decent amount of stuff to get rid of.

Also starting a second full time job in a little over a week so I'll be crunched for time (as if I'm not already) once I start.
 
Last edited:
You must log in or register to reply here.




Top