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Re: the lowest power laser can kill the Mosquito NOOOO! pest distruction MUST involve massive technoillogical overkill. death is a bad thing so at least we can make it fun. i suggest two 6ft freestanding tesla coils with co2 lasers pumping ion trails from the capacitance hats to the target...

totally correct, the chinese have access to a massive array of hardware, combined with low health and safety requirements and low pay. they have a true free market economy. who would have thought the communists would get there first? they will make cheaper higher power products while they sell...

16.6 ambient, 78 stable. 1000mW 17.7 stable from the 200mW the metal is 20x20mm with 10mm dia port either side for input and measurement. the test piece is held in a 30x40 expanded polystyrene block 20mm thick ie 10mm front and 10mm rear. the measurement port is sealed to the ir thermometer so...

your the kind of friend i need! i also am not sure i should have not used kelvin in the first calc... i shall take the dogs out and retry you scheme.

cokoo 1000mW blue: start 19.5c 1 minute end 59.5 300mW?

my math skills have rusted like a 1970's fiat. thats why im posting the readings rather than my dodgy working out. volunteers are more than welcome to put me straight....please! i dont think my first working was so good, 9mw???? i used this: http://www.endmemo.com/physics/specificheat.php

first exposure: lazerpoint green 200mw (advertised power) start temperature 18.6c 1 minute exposure end temperature 19.8c 1.2c rise in 0.5g mass of Al specific heat 0.91 Kj/Kg/c or 0.22 Kc/Kg/c maths is not being my friend... it seems 60 seconds gives me 0.546 j or 9.1 mW! lets try with a...

first pics

im branching off here. feel free to join me and see my dismal journal of failiure ;) http://laserpointerforums.com/f70/bs-detector-lpm-experiment-81466.html#post1170199

ok, starting this thread as a journal. first test is a block of styrofoam housing a 0.5 gram aluminium sheet blackened with marker pen. an aperture at the front and back allows laser to enter and hit the sheet, and a infrared thermometer secured to the rear to record temperature change over a...

yes i feel the same way. im not looking for huge accuracy in the milliwatt range. only the hardcore want to know if a beam is 5mw or 10. i dont imagine most care. if light is anything like radio it takes a doubling of power before a change is noticed so we use decibels instead. for example...

BurnaPeanut thats a link by the way also infrared thermometers can be had for 10 bucks now, removing the need for the tthermal mass of a contact probe, and liquid. now thinking about a 100mg aliminium sheet insulated on all sides exept the measurement and laser apatures, one each side...

nice. we should have a new thread: laser presidents. if i may, i will harp on a little more about measuring power. i think it feasable to make a small bomb calorimeter to measure the joules of a laser over a period of seconds. similar to the famous burning peanut experiment from school class...

bulgarian english spanish some french and german, learning russian. try to understand american english but the spellings all wierd. the universal languages should be linux and clingon

the 317 disipates excess power as heat. you get 2.5w from usb and need no more than 40mw for the worst possible driver circuit in the pointer. check out some of the maxim chips that use switch mode to drop 5v to 3 volt. maxim do all sorts of power ic's to step voltage up or down with brilliant...

wow! give him a break already, its not like hes run off with your wife or something. if astronomers are happy because his laser turns on, points, and they can see it point to a star, thats a 100% perfect product. nobody can run a business making unique pointers with nasa acuracy in solid gold...

Re: the lowest power laser can kill the Mosquito 200 mw burns the ticks off one of my dogs without hurting the dog (white dog) black dogs just singe the fur. but for white fur/black evil tick: win! much nicer than using a ciggarette (and i no longer smoke) and you do have to burn them to get...

i didnt know that alignment was the issue with low temperature, thats very interesting, in my electronics experience the crystals we use are resonators ans change frequency with thermal expansion. clearly lasers are a different mechanism. i have learnt something new, thanks. in my comment i...

i come from a electronics design background, and seeing your product i imagine the best way to solve the cold problem is to sell a heated sleeve. its the nature of semiconductors that they perform best within narrow temperature limits. trying to work around this using electronics alone is...