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Well, if you don't need the recoil, the circuit is very easy ..... just a microswitch, a monostable circuit (555 IC) and a battery ..... in this case, a lot of space, in the gun, cause you take away all the "unneeded" parts (cylinder, springs, and so on), and for this reason also a cheap "spring...

Consider one thing, anyway ..... if you want to have a "realistic recoil" and a laser shooting at the same time, you will probably end needing a lot of space inside the weapon, so need to get a big gun (and also, any modifications will be permanents, no way for turn the airsoft back to shoot...

^ yes, also that can be done, but you need a specific software for that ..... if you remember the first "shooting games" for TV consoles, they was working exactly in that way ..... a lens that focus the sensor on the screen, as more precisely as possible, and a software in the console that was...

Argh ..... this mean i already have lost another occasion to post some stupid comments in PM ..... damn ..... (just kidding, ofcourse :p :D) Well, i suppose that this may depend from the woman attitude ..... (LOL, sorry, can't resist ..... absolutely no offense intended, anyway ;))

^ well, i made them as "passtime" in the free time, for friends ..... i don't have commercial capability to made them on order or sell them, sorry ..... Anyway, with airsoft guns, the main problem is the intrinsic "precision" of the assembly, and for this, the maximum precision that you can...

^ it means "direct exposure". If you look directly the sun at zenith in a summer day without clouds and without blink, you can bet your vision will develope a "permanent black spot" in the middle in few seconds (where "brief exposure" is intended probably as some seconds, not milliseconds :p :D)

The main problem, there, is that you can not build something similar to the ones linked in your post, without industrial machinery (i mean, never build a small unit like these ones, to fit them inside the barrel of a real gun) BUT, if you want only to build a training system, and you want to...

^ THAT, was your error ..... it's a common law of nature, to never let your girlfriend know that YOUR expenses (especially for hobbies) are greater than HER ones ..... :p :D :crackup:

ROTFL ..... well, considering that all the time a girl admit being a girl (and proof that), online, there's some hundred more posts on their threads with "funny" comments, i bet most of them hides their gender ..... It's all your fault, bunch of perverts :crackup: (by the way, any phone number...

Well, no, light speed is a constant only in a known, given medium (in this case, "c" is referred to light speed in the vacuum), and changes with the density of the medium that it need to cross through ..... in atmosphere, that have a higher density than vacuum, light speed is slower than "c"...

It's difficult to say, not knowing the experiment setup ..... as example, today on news a speaker said, literally, that "for 3 times the neutrinos arrived 60 nanoseconds before the light", giving the impression that the experiment had a light source as reference timing ..... yesterday, instead...

Well, (only partially joking, you cannot know if this IS possible ..... yet) if both the things are true (the light speed as limit, and the 3 tests they made had really all the 3 the 60 nanoseconds result), one of the possible cause CAN (with a lot of doubts) be the real existence of different...

Uhm, maybe they just used chronons instead neutrins for an error ..... chronons travels also in time, other than in space, so if they shooted negative chronons, they traveled back in time during the path, and arrived before the expected. Pity they have not charged them more ..... in that case...

^ well, it don't LOOK as a FAC, but that is one of the problems, from that point of view only, is difficult to say what it can be (also the lens ..... only cause it look round and enclosed in a tube, it don't mean 100% that is just a lens) ..... also, a reflection gain medium ? ..... hm ...

^ I think trees or similars ..... it seem a photo from Thailand or similar zones, and there, the concept of "safety" in work and road circulation, seem "a little bit lack" :D Like this: I know that all those bottles are empty, but, wth ..... try to go around in this way here, and you become...

Never heard about the elementar concept of "overload" ? :p :D

The one you marked "green blocking filter" is more probably the 808->1064 converter ..... the one marked "?" can be a mirror or a waveplate filter, but is difficult to say it precisely, without have it in hand for do some tests, sorry. EDIT: can be interesting if the next one that want to rip...

Then is probably an intracavity setup, with the 808-1064 directly coupled to the LD, and the doubler in the cavity (the concavity of the end mirror is probably focused in the center of the crystal, for better efficence) ..... is strange that there is no thermal sensing, together with the...

Hm ..... it look as a direct-coupled diode-crystal assembly, placed in a folded cavity ..... not sure about the electro-actuated optical element in the middle of the cavity, can be a piezo-drived etalon unit ? ..... like in the Fabry-Perot interferometers ? ..... just an idea, i'm not sure about...

ROTFLMAO :crackup: Sorry, but this remembered me an old discussion i had with one of my professors, when i was young (ages ago :p :D) A perfect example of a totally incomplete question, that is ..... and i used that same example ..... the only possible answer to that specific question is...