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FrozenGate by Avery

Review: 1.9A DTJRFX maglite laser gun

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Aug 30, 2010
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Greetings folks.....! Here's a review of the Jayrob modded (flipped backwards) 1.9A maglite laser gun that I've decided to call the DTJRFX.

Before I continue I want to sincerely thank Jayrob and DTR for making this possible. Actually it almost wasn't possible, at least not at first or the way I wanted it to be. The story goes like this. Somewhere about 3 months ago I came across this litegrip gun handle by sureshot made for maglites.

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After I saw a picture & video of what this grip was made for, I immediately thought 'laser gun yesss!!'. This is of course thanks to builders like DTR and Jayrob, specifically for this powerful maglite laser!

Right away I thought to myself, I had to have one - there was no question about it. The only problem was I didn't like the way it looked with the maglite centered over the grip handle, it didn't look very 'gunlike'. It had to be this way though because maglites are forward clicky's and that's just the way the handle was made by sureshot to 'fire' the flashlight :thinking: I couldn't have it, it had to be different. I thought about it for a few minutes & took the flashlight components and reversed them to see how that worked.

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It looked way better to me with the handle hitting the switch at the rear of the maglite. Now it looked like a gun, the only problem was making it work like one. :thinking:


Here's the deal
I got in touch with Jayrob and passed this idea by him to see if there was a way to reverse engineer a maglite so the switch was towards the rear rather than the front. At first Jay was hesitant, pretty much telling me there wasn't. Then after a few hours, a few more messages and even some drawings - low and behold Jay came up with a way to make it work! I've said it before and I'll say it again, I truly feel privileged to know a guy like Jayrob. I have nothing but respect for this man!!

The build
There were 2 parts to completing this project, one of which I couldn't have done without Jay's help. The more difficult 1st part IMO was just that, having the maglite body switched backwards so the clicky was in the back rather than the front. Jay has a thread on how this was done here. :D

The 2nd part was simple, which was just assembling the components. This involved mounting a preset (1.9A) FlexmodP3 driver to a massive heatsink that fills the entire head of the maglite, soldering a wire from the battery contact board to the driver & soldering 3 wires to the diode. (case pin used) After that it was getting some 32600 batteries and putting it all together. A 1.9A maglite laser gun! I'll let the pictures & video tell the rest.


Pictures

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Now something interesting happened to the way this laser functions since the time it was built and the time I am writing this. One of the batteries was shorted out and damaged recently when I was traveling. The TSA apparently saw it in my luggage & had suspicions. I'm guessing they tested it somehow & blew it out - because it's siding was burnt off in one of my bags. I had no notice from them about this or any inspection, but the battery was near dead & burnt out. I taped it up & charged it in a protected environment in case it blows up because it's unstable. After 2 full days it only puts out 3V instead of 3.7 (4Vpeak). Because of the voltage input indifference, the driver doesn't have enough push to send 1.9A to the diode. This lack of voltage causes the driver to discharge before reaching 1.9A and consequently delivering a nanosecond partial charge to the diode. The result from this is obvious in the videos, because no matter how fast you're moving your arms around our pulling the trigger - you're always firing a perfectly, equally timed single nanosecond laser pulse. THAT is what makes firing this thing so unique and addictive :beer:

Anyways, until my replacement batteries show up I can only use the laser in low power mode. This came from an accident but has now yielded 2 preferable outcomes. (1)The laser was only high power mode, but now can be used at low power mode. Now I can demo the laser to people indoors without worrying about blinding anyone I'm not shooting. (2) Because of the voltage shortage to the driver, the laser fires in single pulse mode. What this means is no matter how slowly or quickly the trigger is pulled, each shot fired is a short pulse that geniunely resembles a laser blast. This is not firing short incriments of a beam from quick trigger action, just one short perfect laser pulse everytime. Have a look... :beer:



After making & submitting that video, I was told that it was missing the pew pewing. They were right, but I also thought of this originally but wasn't going to worry about crossing that bridge until I got to it. The next day I went out and got this...



Within a half an hour I took the toy gun apart to gut it's soundboard & circuits to install in my laser ;)

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I'm only using electrical tape right now because I haven't drilled out the host & the surefire grip yet for a permanent install. For now I'm mounting the soundboard trigger directly behind the surefire trigger with double sided tape for (1) height adjustment to accurately time the soundboard PEW when the laser fires, and (2) so it sticks.

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I also drilled out a lens cover to the size of the button on the trigger to cover it because I needed the additional space between fully pressing it in & shooting.

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Here's the soundboard & battery going in the 'extra space' Jay had from his original design.

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Again, the electrical tape is temporary just to hold and test these components.

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And here's the result...



Again I want to thank Jayrob, DTR and litegrip and this forum for making one of my childhood dreams a reality. I finally own a laser gun, capable of shooting in low and high power modes - and I just cannot put the thing down. Thanks for reading :beer:


UPDATED 2 DAYS AFTER POSTING:

I ended up not throwing away the other toy laser guns & decided to see what I could do with them instead, take a look :cool:




UPDATED AGAIN 2 MONTHS AFTER POSTING, 07/09/11:

Just a follow up folks, I just wanted to update what I did with the toy laser guns from the original project. Here's the short story... Since the maglite project I've been working more with the toy guns trying to make them into monopulsing laser guns. For 2 months I've been working on building a circuit with a very respected member on this forum (a million thanks HIMNL9) and redesigning the guns to make this possible. After testing and installing the IC into these laser guns they are finally where I want them to be! :cool: Monopulse firing laser guns, meaning no matter how fast or slow you squeeze the trigger - the laser will fire one short perfect pulse each time! Have a look




:beer:
 
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Very nice review of an incredible build +1, no +100 to you sir. That is just awesome, and being able to run around screaming PEW PEW PEW with sound effects must be hours of entertainment! What made you go withy 1.9A? I just had my custom ehgemus host at 1.8A degrade, so I turned it down to 1.7
 
Interesting mod with the sound board...

Must be using a separate battery supply for that huh?

It would be cool if you could wire it so that it can use the same supply as the laser, and also the same switch as the laser. But that would be hard to do because you would have to get the positive from the front end of the build...

Too bad somebody messed with it. Hopefully it's only the battery. Probably cause it looked like a gun maybe??

I guess in hind sight, you probably should have taken the batteries out. Maybe the pistol grip handle off too...
 
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I am using a separate battery for the soundboard, a 3.6V 14500 tucked down in the spacing. I also didn't want to wire anything to the laser circuit because I don't know how the different or combined voltages would effect the overall circuit.

I didn't bring the gun handle with me when I traveled, not a chance! I did bring the maglite host, the batteries and the driver all packed separately in different bags. I always take apart my lasers when I travel. The batteries were in with my toothpaste, mouthwash and deodorant - packed in a plastic side pocket with nothing else. The host was in the suitcase with a bunch of clothes & the drivers and diodes go in my carry on laptop bag.

Thanks Jake :D I went with 1.9A on the driver because that's IMO pushing a 445 to the max while not burning it out too soon :eg: It is a blast (ha) to have though, no kidding... I've been shooting the hell out of my basement & those posters for days. I swear my arm is ready to fall off.
 
That's kind of strange that the battery had the visible damage when it was just in a plastic bag??

Maybe the altitude affected it or something?? That's weird...
 
Yeah it is strange Jay, I've often wondered if it was ever tampered with also & instead somehow discharged itself to a point of destruction in flight.

I'm happy the outcome yielded what it did though, because now I'm seeking a way to 'single pulse' the driver per trigger squeeze at full power. I've done some exstensive searching on 'pulsed drivers' here, but most of the threads I've found talk about increasing the power in PW and at different frequencies - something I'm not interested in.

While I know there's pulsed drivers out there, I don't yet know if there's one that will do one pulse per closing a circuit, giving me that 1 pulse 'shot' seen in the videos but at high power! THAT feature is what makes this 1000% better IMO, and something I'll be working on quite soon :beer:
 
What power output are you getting with that dan? If that is your real name Dan ;)
 
That looks like a maglite with a pistol grip.:crackup:
The sound FX is epic!

danefex said:
While I know there's pulsed drivers out there, I don't yet know if there's one that will do one pulse per closing a circuit, giving me that 1 pulse 'shot' seen in the videos but at high power! THAT feature is what makes this 1000% better IMO, and something I'll be working on quite soon
One way I could think of would be to set up a 555 in monostable mode, it'll give you a single
pulse (width= your choice) per input signal.
555 timer
Then you'd feed the 555's output to the FlexMod's TTL input, done.:cool:
 
What power output are you getting with that dan? If that is your real name Dan ;)

I'm guessing around 100mW Jake, but I'm not sure because it's such a short pulse and I can't meter it. From my retina's guess, and comparing the dot alongside a 200mW 445 that I'm trying to imitate the speed of the pulse - it appears to be 1/2 of what the 200mW puts out. So that's just a guess though, and yes my name is Dan :beer:

That looks like a maglite with a pistol grip.:crackup:
The sound FX is epic!

One way I could think of would be to set up a 555 in monostable mode, it'll give you a single
pulse (width= your choice) per input signal.
555 timer
Then you'd feed the 555's output to the FlexMod's TTL input, done.:cool:

I've read about those 555s and MOSFETs in general in some of the older threads, but again I haven't found any info on installing one yet and/or setting it to what I'm interested in. That is not my area of expertise, but I'm getting there and I know it can be easily done. I just haven't found the simpiliest and most effective method to apply it yet.

I'd love any input or suggestions on how I could add firing a full power (or preset) single mode pulse per closing the circuit (trigger pull) each time. Thanks for addressing this Anselm and for the link! Ahh that's awesome, that's absolutely what I need! Pulling this off would be a killer win!! :D
 
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OP updated, last video added showing what I've been doing the following 36 hrs after finishing the 1st laser gun :beer:
 
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Sweet build. Like the mod for the sound effects.:beer:
 
Sweet build. Like the mod for the sound effects.:beer:

Words fail me DTR, this would have never been if it hadn't all started with your maglite build. As with Jay, I can't thank you enough. My new thing now seems to be laser guns hehe :beer:
 
Uhh.... no! It looks as if I need to send you one of my guns hehehe, OR WE NEED TO HAVE A LASER SHOOTOUT!!! Either way man, That's just awesome Jay! :beer:
 
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Thought you might like it... :)

It has two sound choices, and I'm using copper for the module heatsink, as well as the driver heatsink...

Did you notice the blue LED light coming out of the vent plate on top? :cool:

Here's another video of a 12X version: :D (for the 'pulse' effect, it's just a matter of letting off the trigger)



Lots of details on the build, including close up pictures of the cone tipped EzFocus adapter and stuff shown in my tutorial: (wiring sketch too!)
http://laserpointerforums.com/f51/tutorial-12x-star-trek-phaser-mod-46886.html
 
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