Super small blue build?

[jaybob]

Hey i was just fantasizing about a small 445 build the other day, and i kinda wondered if the idea that popped into my head would work, could i use one of DTR's 1.5-2w 445 diodes, and hook it up to a resistor and then an 18650?
or drop the resistor and run it straight through a 10180? I know neither option is very good for the driver but im not looking for a massive run time... how much would you estimate the mw output to be? how long would the diode last?

I'm still new so cut me some slack for my ignorance, i just couldn't find anything on it through the search... thanks for your replies! :thanks:

 

[ARG]

Look up the LM317 driver/DLL Driver it's a good DIY Driver that should work for you.

 

[jaybob]

The point was i was trying to avoid using a driver, thats been done before, and of all the like 20,000 questions i just asked that didn't answer any of them... :thinking:

 

[JLSE]

Members here have hooked a 445 straight to an 18650 with no problems
and a max output of 700mW IIRC.

Personally I wouldn't recommend it, but it has been done and without a resistor...
You will get better results with a boost driver.

 

[jaybob]

Thanks for the info wannaburn, any idea how long a diode would last hooked straight to an 18650? also your 2.8 and 3.5w dual diode builds are AWESOME!

 

[JLSE]

Thanks

The problem running straight from a single cell is that even though there
is plenty of current available, once the voltage begins to sag, the output
drops.

Here is a thread which may cover some of your questions.. You have to skim
to find the related info.

http://laserpointerforums.com/f65/direct-drive-445-host-52918.html

 

[Ghostchrome]

Is that you, Kipkay?

 

[chipdouglas]

Hey i was just fantasizing about a small 445 build the other day, and i kinda wondered if the idea that popped into my head would work, could i use one of DTR's 1.5-2w 445 diodes, and hook it up to a resistor and then an 18650?
or drop the resistor and run it straight through a 10180? I know neither option is very good for the driver but im not looking for a massive run time... how much would you estimate the mw output to be? how long would the diode last?

I'm still new so cut me some slack for my ignorance, i just couldn't find anything on it through the search... thanks for your replies! :thanks:

that wouldn't even be close to the smallest 445 build.

 

[jaybob]

Is that you, Kipkay?

Don't be silly, kipkay couldn't type this, im sure he has to have burned his fingers off or his eyes out by now, right along with everyone who tries his builds and doesn't use glasses!

that wouldn't even be close to the smallest 445 build.

I never said it was the smallest build. However i would like to make the smallest 1 watt build i can as a novice, if you have a way to shrink it any smaller i would loveeeee to hear it though!

 

[chipdouglas]

it's expensive because you have to get creative with batteries/driver/ and a must for a compact high power build would be a jayrob g1 lens.

michael.

 

[Fiddy]

using a resistor to limit current is a lot more inefficient than a DDL driver, not to mention there's no regulation so as the battery voltage decreases so does the brightness.

 

[LaZeRz]

I guess you can buy a really small AAA host and get a module or direct press heatsink made to fit inside

 

[mpwn]

Check out jayrobs kit there super small super power

 

[532 with Envy]

Here is Jayrobs build, nice clean and shinny and a better build than mine, with its nice diode press heat-sink.......geez I wish I had space for a lathe.:yabbem:
http://laserpointerforums.com/f64/fs-stainless-steel-10440-kit-awesome-45919.html

And just because I think it might be one of my own favorite builds...and for a bit of info for your part. It could be set higher, but I wanted to keep it conservative.
http://laserpointerforums.com/f65/10440-140-micro-build-58538.html