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Subject: Re: Laser Pointer Project
X-Newsreader: Forte Agent 1.92/32.572
Date: Sat, 07 Dec 2002 15:32:47 -0500
NNTP-Posting-Date: Sat, 07 Dec 2002 15:32:48 EST
Organization: Bell Sympatico
Can this be used to drive your minor or the laser ?
I just took a part an old Seagate hard drive . On it there is the
mechanism that positions the heads on the plates. The travel is about
1.2 inches. The quality of the workmanship is excellent with roller
bearings etc..Original cost $500.00 !!!
I applied 1.5 volts from an old aaa battery to the coil and it
traveled from one end to the other. I inverted the voltage and it went
bang to the other side.
Old hard drives are a buck a dozen.
On Sat, 7 Dec 2002 18:52:22 +0000 (UTC), Soeren
>Thorfirstname.lastname@example.org (P!erCer) wrote in
>> Also, I am still wondering about blinking. I know it's possible, at
>> least with certain lasers, to blink them very fast (think gigabit
>> fiber). Anyone know if this will work with cheap laser pointers?
>Do they need to blink any faster than you can perceive ?
>If you need to see the blinking effect, you will have to stau below 20Hz
>and that is quite allright.
>> And what kind of signal do I need to drive it?
>Gate the supply on/off with eg. a BC327 (PNP) or BC337 (NPN).
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