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ArcticMyst Security by Avery

FS: ***Selectable test load up to 3A (assembled or DIY kit)*** IN STOCK!

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I'm sorry what I meant was that in parallel they would be able to handle double the rated wattage. In series they would still only be able to handle 5W, but then I see how it would still work since it would still dissipate about the same wattage as in parallel.
 





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My main point was if you were making new boards you might want to consider revising the design for using two resistors. As it is though they work great.
 
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I'll put some thought in it and maybe do small batch to see if there is any interest

And the test loads are back in stock! :beer:
 
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I saw that you should use 4 jumpers for blue. Is this true for the 9mm diode?
 
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The 9mm 445s have a higher Vf than the regular 445s, but only by a little bit. I think they top out at 4.8V @ 2A
 
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Blue is blue. It shouldn't matter.

This isn't very true. PL450 diodes for example use significantly higher voltage than a M140 and 9mm diodes use less voltage than an M140.

At 2.1A my test load is at the correct 4.9V for a 9mm on the second jumper. For currents 1.8A and over for an M140 I use the third jumper.

The 9mm 445s have a higher Vf than the regular 445s, but only by a little bit. I think they top out at 4.8V @ 2A

Haha, I found quite the opposite actually. My M140s typically draw 5.1V to as high as 5.6V.
 
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Sooooooooo, for a 9mm @ 2.3a, what jumper should I use? Had a hard time deciphering ur last message :D
 
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#3 would be a good fit. Be careful your pushing the current limit on that 9mm! I'd dial it down just a tad to be safe. :beer:
 
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I would say the second jumper may actually be closer in voltage but being a little over isn't really bad either. Its under that seems to be the worst idea.

9mm diodes typically can actually handle 2.5A easy enough if you have a large enough heatsink. Typically I would suggest 2.1A for long life, 2.3A for power, and 2.5A for an all or nothing laser. My exp shows that a 9mm can handle up to even 3A but there are usually little to no output benefits and the life span would decrease.
 
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@irishluck: Yes, they're in stock! I only have 1 available and 1 pending payment.

@AliceInChains: PM replied!

I'll have to edit the first post for future changes because for some reason the thread title can't be changed. And I also forgot to change my signature :eek:
 




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