Dorcy Jr. New Q&A thread

[Kenom]

Absolutely not for the gluing it down. You need to be able to adjust the focuse from small to large. When you shine it down the way, you just need to focus the dot at the target. it's going to be big in between.

As far as the video is concerned I tried to make it really short and put in all the right details and I never seem to. Folks always have questions afterwards. The trace seems to be the biggest question. If you look on the board itself there is literally lines hidden on the board. those are the traces that your going to sever. As long as you followed the places I indicated and cut alone the point you'll have gotten them.

 

[tone1132]

I adjust it to the smallish beam a foot or so from laser. Then when I shine it down range, its huge again . HUH ?? How do the cheapo pointers stay small for a long ways ? Do I need to glue the focus when I got it right ?
thanks
Dave

Dude are you making jokes on this thread? ive seen your name on threads that have explained this. but herr you go anyways.
when you focus it up close , the light will continue on its path and cross over. try to focus it on something far away.

Oh, And kenom, I think your video is great! its more like a inroduction to give you the idea, then you ask questions and read threads and actually build it.

 

[Kenom]

MY GOD I LOVE THAT PICTURE!!!!

 

[tone1132]

was that sarcasm?

 

[tone1132]

It's pronounced
Kenom not KEEEEEnom
or keynom

ahhhh.... its like "VENOM" But with a "K"

 

[txcwboy]

Youve seen MY NAME on threads ? I was being witty...yes. I said I liked the video and I hope he caught that part. I just said where I thought it needed attention but I made mine from it and it works so it must be good .

 

[tone1132]

Youve seen MY NAME on threads ? I was being witty...yes. I said I liked the video and I hope he caught that part. I just said where I thought it needed attention but I made mine from it and it works so it must be good .

nevermind. do you get the concept of fcusing the laser? did the pic help??

 

[txcwboy]

Got some matches finally. They are white so I gave them the sharpie treatment. Couldnt light the match ! :'( I dont really know what I am looking at so the chart doesnt make sense to me.Its pretty though I found a 5.6 ohm and I am going to redo mine set up today. It has a 10 on it. So your saying DONT focus it on something close ? or its always going to have to be focused ?

 

[Glaserfan]

.. The lens works similar to using a magnifting glass to burn ants in the sun. If you move the magnifying glass away from the ant slowly, the "dot" gets smaller. Once it reaches its smallest point, if you keep moving the magnifying glass farther away, the "dot" gets bigger again. This effect is what the Pulsar diagram earlier in this thread shows.....


You will have to focus the lens for any differences in distance. The aixiz modules I have had give me excellent focus anywhere from 2 inches away to up to about 5 feet away. Beyond that, the focus is VERY touchy, and takes patience to get right. I have managed to pop ballons from about 30 feet away, and light matches at about 8 or so feet. One way to know you have it right is that the "dot" at its smallest size will appear to flicker, since it is small enough to reflect off the grain of most objects. Its much easier to get it close, then move the laser closer ot farther from the target until you achieve the best burn.

For infinity focus, aim at an object 50 or so feet away(use a scope or binoculars) and focus it to a tight dot. Ifd you focus too far, the dot will start to get larger in diameter. Adjust to the midpoint where the dot is smallest.

*EDIT*- A little late with my reply :-/, but hopefully my info helps.

 

[charleytown55il]

kenom, what type of batteries are you talking about not being able to use because of instand death? lithium ion or NI-MH?

 

[tone1132]

.. The lens works similar to using a magnifting glass to burn ants in the sun. If you move the magnifying glass away from the ant slowly, the "dot" gets smaller. Once it reaches its smallest point, if you keep moving the magnifying glass farther away, the "dot" gets bigger again. This effect is what the Pulsar diagram earlier in this thread shows.....


You will have to focus the lens for any differences in distance. The aixiz modules I have had give me excellent focus anywhere from 2 inches away to up to about 5 feet away. Beyond that, the focus is VERY touchy, and takes patience to get right. I have managed to pop ballons from about 30 feet away, and light matches at about 8 or so feet. One way to know you have it right is that the "dot" at its smallest size will appear to flicker, since it is small enough to reflect off the grain of most objects. Its much easier to get it close, then move the laser closer ot farther from the target until you achieve the best burn.

For infinity focus, aim at an object 50 or so feet away(use a scope or binoculars) and focus it to a tight dot. Ifd you focus too far, the dot will start to get larger in diameter. Adjust to the midpoint where the dot is smallest.

*EDIT*- A little late with my reply  :-/, but hopefully my info helps.

very good way of sayin it! +1 rep for you!

 

[sk8er4514]

ok i'm curious what is going on w/ my dorcy.

I've got a long open can diode with a 3.3 ohm 1 watt resistor on a dorcy jr and its all soldered really well. when i turn it on the diode will turn on or flash for a few seconds then not come on again for a while. i've only had it stay on for more than 5 seconds once. the diode is really bright so i know its not burnt out (yet *crosses fingers*). i read that a 3.3 ohm should give around 400-420mA which should make the diode happy but no...

anyone had this happen or know whats going on? thanks

edit: well i had it working but now its flashing again... bah

 

[Glaserfan]

sk8er4514, If I were you I wouldnt risk killing that opencan any longer... from reading about the newer Dorcys(which I am sure you have), plus my own experience, to me it is a much better idea to run a more stable proven boost driver in these, at least with the harder to obtain diodes...

My Dorcy driver, tested after it blew my 16x diode, was putting out an average of 267mA.. BUT would spike over 400mA at startup, and after 30 seconds of on time would jump between 280mA and 320 or so mA.. this was with 2 10 ohm/1 watt resistors. Testing was done with the dead diode still connected.

I can only imagine the current jumps while that laser is "flashing" :-/.

Just trying to help

 

[Kenom]

lithium-ion since it's a boost and the lithium ion is 3.6v to start it usually boosts it too much.

 

[txcwboy]

readjusted the focus for match book distance and fired the match up pretty quick ! I also upgraded the resistor from a 10 to a 5.6 ohm.SO thanks for all the help

Dave