 Green Laser Repair
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Penguin7471
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Registered Member #71
Joined: Thu Feb 09 2006, 08:23AM
Location:
Posts: 63
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Mercury oxide batteries deliver 1.35V if I remember correctly. I would tend to agree with '...' but even 13.5V is a weird voltage... a standard fully charged lead acid battery has an output voltage of 13.8V. I don't usually see it as 13.5, but perhaps thats just me.
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Carbon_Rod
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Registered Member #65
Joined: Thu Feb 09 2006, 06:43AM
Location:
Posts: 1155
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“1 and the 3 has morphed into the three, making it apear as if the circuit calls for a 135 volt battery..†Yeah -- the 7.5k looks like a 75 k too… =)
Actually I remember the original design had two 67.5 vDC batteries in series (visual recall is rarely wrong about these things.) It was adjusted to run with 50ns pulses with a jumper in place of the diode. IIRC it ran at about 15MHz and did required the use of a 1-Ohm carbon resister (also provides a way to scope the related current pulse magnitude.) It also required manual verification that the current pulses are less than 3 times the threshold current (it was common back then to see pulses in the range of 5A – 10A for this diode type.)
I just wish I could remember where it’s from to cite the author. =o/
(No more summertime patio beers…)
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TheMerovingian
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Registered Member #14
Joined: Thu Feb 02 2006, 01:04PM
Location: Prato/italy
Posts: 383
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Use the 5mW redlaser modules that are selled at about 4 bucks x each (
they have lens and internal regulator. So just apply 3V (or 2.5V) and you get a stable, feedbacked laser beam visible from about 500mt at night.
I bought three of them and they work very well. The only warming: NEVER remove the lens or the dust will come in damaging the coerence and scattering some light.
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