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Well I'm sure many of you know the machine that goes ping from Monty python. I want to make a circuit and put it in a little box so when you push a button it goes "ping". pretty simple... I'm wanting to do this because a teacher i had in high school (ive just graduated) promised an "A" to...

Now most of us will have some funny party stories, this may or may not involve lasers i don't mind, i just find funny party stories are usually really amusing :P. i have plenty being in high school :P a good one was this Tuesday just gone, me and about 20 friends threw a surprise party for a...

Hey guys just been reading a post and instead of "dr u. gs" there was "im a stupid spammer" i personally like this sort of stuff. could we have some other things maybe swear words that are normally #$%#@ or whatever replaced with funny/witty things. not really a major thing just something that...

ok guys im reminded of some movie i once saw..... dunno wat.... but anyway i was chewing on a ink tube thing from a pen trying to get the stopper out so i could get the ink out to smear on a door handle (makes a mess on persons hand who touches it) anyway i pulled and pulled at this thing then i...

hey there guys, SenCat said something interesting in another topic, no Australians have been getting together for laser related stuff, from this forum....sooo is there anyone else here from QLD?? or anyone who reckons they could hold some sort of meeting?

hey guys i just thought of something that would be kinda handy. laser glasses with interchangeable lenses or lenses that clip onto normal glasses, like the type u can get in sunglasses for driving.

http://www.technologyreview.com/Infotech/19142/?a=f i hope u guys find this interesting. personally i think its a REALLY cool idea!.

hey guys just telling ya all that im not here for a week, because im going skiing!!!!.... yeah i know skiing in Australia, not expected right? well we actually have some pretty good snow here.... 1.7 meter base :). im going with school and about 8-10 of my good friends are going so it should be...

sounds too good huh? well i looked at wikipedia (unreliable but its been there for a while so im assuming its got some truth to it) and saw that holographic discs use green lasers in the order of 1WATT!... http://en.wikipedia.org/wiki/Laser just scroll down to "Example uses by typical output...

hey guys ive just conducted a physics experiment dealing with converting laser energy back into electrical energy. ive only just done the testing but i can tell you its not very efficient but it does produce some results. We used two lasers, a green and my homemade dvd burner red firing across...

So whats the fuss bout IR??? i mean i though it was absorbed by most materials making reflections unlikely. also wouldn't it only be really harmful if it was focused at the eye, i heard IR does not focus like the visible light or something so i suppose it could get in your eyes if the laser was...

hey just yet another sad post about people doing the wrong thing. recently in Australia many people have been pointing lasers at planes and this really really.... bugs me.... heres the article. http://news.ninemsn.com.au/article.aspx?id=280067 tho how on earth do you stop some 9 year old with a...

ok guys its something thats been nagging me but i have not asked for a while... whats the difference between AAA and AA batteries? i mean is it just physical size or is there more to it?

hey guys a friend and I are doing a physics experiment and surprise surprise were thinking of using lasers. what im wondering is what would be a reasonably cheap laser power meter that i can get hold of in australia. The laser being used will be approximatly 100mW so it dosent need to be...

yes theres always that "but".... last night i was shining my green 50 mW ebaser (still very happy with it) at a pink woolen blanket hung over a handrail by the stairs and it looked very green and normal till the laser hit the part that was folded on the floor and WOW bright yellow..... and i...

hey guys with all the veteran laser people here there must be some pretty cool stories that have to be told..... scaring/amazing someone.... any good stories here?????

hey guys quick question.... what is "warm upp time" for lasers... with my 50 mw greenie the instructions say "warm up time under 2-3 minutes....what does it mean... does that mean dont run it for that long or it will over heat.... or it wont run properly until 2-3 min??????

can anyone help me with what i hope is a quick question my newish laser when i turn it on its really bright but after .5 sec it dims to a much weaker level.... is this prob just the batts running low? i don't have any more to test so is this typical of low batteries?

hey guys im officially the owner of a green laser!!! my 50mW ebaser came today and i must say its very very cool! i haven't tried a balloon but from bout 5 cm after a bit of trying it made a sharpied match light i could see the beam in darker areas of the house however i can now see it all over...

hi there i just got 2 diodes out of a dvd reader /writer and i found one to b infrared (used mobile phone to see it :P) and the other one which i assumed to be red wont work... ive got the polarity right i know cos i tested on multimeter however i hook it up with bats and resistor and no...