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

Buy Site Supporter Role (remove some ads) | LPF Donations

Links below open in new window

FrozenGate by Avery

List of 445nm diodes

Diode: A140
Driver: Micro Boost @ ~1.2A
Lens: AixiZ 445
Power: >1.1W
Host: Ehgemus 18650, Press fit diode, full aluminum body.
 
Last edited:





If you see 5 amp current draw, your driver and/or battery are crapping out. Its not unlikely either, since many drivers were designed to drive lasers at much lower power levels, and the inductors on them go into saturation if you demand this much current from them.

You might reconsider switching drivers though.. 2 lithium cells in series and a good (not lm317) driver are a very good match here. With the batteries supplying about 7 volts and the diode taking a bit over 5, its a very good match for proper linear drivers. A well designed linear driver will not require more than 1.1 volt drop, so there is a bit of room to work with!
 
I am not sure if this is the exact same one you got T_J but I do have to say I really like it. The threading feels great and I really like the focus adapter. The clicky has a really smooth feel to it and the pill area has great space. Great work Ehgemus your build quality and look are second to none.:beer: I am just waiting on some diodes to get here to get it running and do a review. ;)

p1010485t.jpg

p1010486fz.jpg
 
Just finished my latest 445 and it's one of the sweetest hosts I've seen. :)

Side button clicky from Pontiacg5... (the side button material is a solid piece of stainless steel)

pontiac%201.jpg

pontiac%202.jpg

pontiac%203.jpg


I had PM'd Pontiacg5 and he told me that he had scrapped the project for now, but that he had a host laying around...

He told me that it needed work to get it set up because it did not fit an 18650...

No problem... I just set it up for an 18500...

I also replaced the momentary switch that he included, with an 'on/off' clicky. I used the spring from the clicky and re-shaped it for fitting the bottom of the battery compartment to give tension for the 18500 battery...

Really nice clean work with the host and focusing adapter. Absolutely perfect once built. :cool:

I had to leave long leads from the diode pins, and then slide the switch/driver assembly in place, being careful not to let the wires get bunched up and in the way...

The assembly was a little tricky, but well worth it!

* A-140 diode
* Micro Boost at 1070mA's
* AixiZ 445 lens
* 930mW's

pontiac%204.jpg
 
Last edited:
Sweeet host Jay.
I have a 18500 driving a 445@1A. Works great.:beer:
 
It's 131mm...

About 1/4" shorter than the custom host I got from you...

pontiac%204.jpg
 
DTR said:
Here are the numbers I got out of a fresh A140 with a G-1 lens. It is a new diode so I did not test it past 1.8A.

mA@V=mW

400@3.9=249
450@4.0=319
500@4.0=391
550@4.0=450
600@4.1=514
650@4.1=596
700@4.1=646
750@4.1=706
800@4.2=770
850@4.2=816
900@4.2=874
950@4.2=941
1000@4.2=996
1050@4.3=1046
1100@4.3=1077
1150@4.3=1163
1200@4.3=1219
1250@4.3=1268
1300@4.3=1306
1350@4.4=1367
1400@4.4=1434
1450@4.5=1494
1500@4.5=1550
1550@4.5=1597
1600@4.5=1630
1650@4.5=1652
1700@4.5=1670
1750@4.5=1692
1800@4.6=1710
Click to expand...

Thanks very much for that, it's really useful. I've just put together my first 445nm, using the same setup you have (A140, G1 lens, Micro Flex Drive V5). I don't have a laser power meter that goes up high enough, so I'm just measuring the current. I'm powering the Flex from 4x Alkaline C cells, and the most current I can get through the diode is 1.2A.

Is my choice of batteries likely to be the reason? I would have thought C cells would have a sufficiently low internal resistance?
 
Last edited:
Where do you measure the current? Between battery and driver, or between driver and laser diode (NOT RECOMMENDED)?
I'm not familiar with the flexdrive, but I think the input current is NOT = the output current.

Also, remember that every diode has a different efficiency, so the correspondance of mA -> mW might not be the same for your diode.
 
You must log in or register to reply here.


Back
Top