PHR-803T Laserlighter safety and focus build:

the15thwiseone · Feb 22, 2011

anselm said:
You can create your own and then print them out yourself:
http://laserpointerforums.com/f44/my-warning-label-generator-yeah-i-bored-45360.html

Or if you search in the buy/sell/trade section, there are one or two members printing
them on metal foil and selling them.

Thanks a bunch Anselm, that will hopefully get the point across that it is dangerous and should be used with caution.

I already had a discussion with my friends about how dangerous it is.

Leodahsan said:
be very aware to not exceed 110mA on the poor diode.

I won't: however i've noticed that several people recomend 4 1N40001 diodes, some recomend 6, others recomend 5...for the test load. Which one will result in the proper voltage reading over the 1 ohm resistor? I noticed 1 person that made the mistake of using 6 silicons and losing 2 diodes in a matter of minutes. (i would rather not make this mistake)

Leodahsan · Feb 22, 2011

for the PHR I recommend 4 diodes in series for the test load. I use 4 for the 445s and it work fine.

the15thwiseone · Feb 22, 2011

Sweet, should be able to set up and test the driver in a couple of weeks, (preferably both drivers.) to tell which i would use.

Pictures soon of the completed housing/modifications to the housing. Also, looking into battery replacement compartments (so the sefety switch doesn't have to come out for the batteries to be changed)

anselm · Feb 22, 2011

Yeah, but the 445nm doesn't worry much if you miscalculate/misread current.
It'll just take it and ask for more.

The 405nm on the other hand is very sensitive to overcurrent and will go POP in the blink of an eye if
you're not doing it right.

Go by the original pictures/instructions from rog8811's tutorial.

the15thwiseone · Feb 22, 2011

According to him its 6 diodes and 1 ohm resistor in parallel (the resistor follows the diodes from the + lead) which isn't so bad i ordered 6 anyways.

I can't wait to get started >,< but patience is a virtue with building lasers.

anselm · Feb 22, 2011

Don't I know it....

In the meantime, practice your soldering skills on things really tiny.

the15thwiseone · Feb 23, 2011

What class would a 405nm 90-110mW range be considered? I read the previous scale and it makes sense, however...the newer scale confuses me sense "reflections" from this laser would cause harm upon contact, and sense class 4's burn and could potentially cause a fire hazzard, wouldn't this laser be concidered class 4 under the new standard?

Ps: how tiny? like...wire to wire tiny?

Leodahsan · Feb 23, 2011

The diode has 5.6mm diameter.

>5mW <500mW = IIIB

the15thwiseone · Feb 24, 2011

In news, i updated the consept: The white tubing will be made from plastic possibly from a white pen, will be 2 inches long, and have a white removable lid to it. The heat sink will be made from aluminium, and be covering the entirity of the front of the Aixis module, which will be in the design of a lighter heat shield (can be removed, thicker than the heat shield, and has 2 "slits" in it.) The Safety switch will have a "flip-top" cover, that you flip open, and can toggle. I wish i could draw as well as i did on paper as i did on MS paint.

Also: as far as the batteries go: does anyone know of hearing aid battery holders? That can hold 3 hearing aid batteries so i would be able to use 2x these holders and get 9 V to drive Jib77's driver. I'm just curious cause those would be the perfect size, and i calculated out the battery life with the driver included, and it came to 3.303 Hours (which isn't bad).

Leodahsan · Feb 24, 2011

3.303 hours not considering driver and diode inneficiency, right?
As the battery holders, sorry but I do not know where to get one

the15thwiseone · Feb 24, 2011

no i considered both:
I took the power coming from the driver into the diode (110[max]mA) times the voltage needed to power the diode (4.7v). then added that to: 9V-4.7V=4.3V*110mA and it came out to 990mW for both combined, this then divided from the mW hours of the batter which was...
9V at 360mAH and came to 3.303...repeating so roughly 3 hours.

Leodahsan · Feb 24, 2011

Oh yeah, didn't realized that this could work.
:wtf: great job dude. Are you considering a 9v battery then?

Edit: If you use two li-ions you will get better results IMO. Longer operating time etc.

the15thwiseone · Feb 24, 2011

Well the issue is fitting it in the host...the host is small, smaller than a laser pen: 9V batter is coming from 6 1.5V zink-air batteries, which have roughly 60mAhour each. If it was a 9v batter it would be 630 mA hours and roughly 5 -6 hours of operation. So yes, i know using thse small batteries is a issue with how long it will last. But its the only way i can see fitting it into the host.

Leodahsan · Feb 24, 2011

You can build/buy another host. Some at dealextreme are $4 and fit a 10440, 4.2v @ 400mAh.

the15thwiseone · Feb 24, 2011

Now your asking me to change my project entirely from a Lighter host to a Flash light like host?

Leodahsan · Feb 24, 2011

Oops my bad. Didn't remembered it was a laser lighter project :sorry:

Oh well, adapters for hearing aids batteries can be hard to find, thats up to you.. I can't help you in that part.

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