Alt-BEAM Archive
Message #03047
To: beam beam@corp.sgi.com
From: James Anderson anderson@cfht.hawaii.edu
Date: Thu, 06 May 1999 09:04:49 -1000
Subject: [alt-beam] Re: step by step FLED SE analysis ( was F#$@ beam)
As a struggling newbie, I certainly do. And if one of yous smart peoples wanna
add reasons for why each step wouldn't work (and what to do about it), that
would be very nice.
Wondering Aimlessly,
James
"van Zoelen, Bram SSI-TSEA-352" wrote:
> I think this is worth to add to the FAQ
>
> Agree?
>
> Bram
>
> > ----------
> > From: Wilf Rigter[SMTP:Wilf.Rigter@powertech.bc.ca]
> > Reply To: Wilf Rigter
> > Sent: Thursday, May 06, 1999 3:52 AM
> > To: 'Bumper314@aol.com'; beam@corp.sgi.com
> > Subject: step by step FLED SE analysis ( was RE: F#$@ beam)
> >
> > <>
> > Hi Steve,
> >
> > perhaps you can check one part at a time as you assemble the whole SE and
> > report what you find.
> > On the attached schematic, what values for C1 and R1, what motor and solar
> > cell? : so we can compare notes.
> >
> > Here are some suggestions for checking each part/step along the way.
> >
> > 1. check the (illuminated) solar cell output (unconnected): 3-5V?
> > 2. add the cap, charge and measure the voltage: 3-5V?
> > 3. touch FLED across the cap: does it flash?
> > 4. charge cap and touch motor across cap: does it turn?
> > 5. connect 2N3904 and the motor across cap, charge cap, then touch a 330
> > ohm
> > resistor between 2N3904 base and +V : motor turns/moves?
> > 6. add the 2N3906 and resistor, then touch a 1K resistor between the
> > 2N3906
> > base and 0V : motor turns/moves?
> > 7. add FLED, if circuit not working: touch 1K resistor between between
> > the
> > 2N3906 base and 0V : motor turns/moves?
> >
> > let us know where you get stuck.
> >
> > (try to) enjoy
> >
> > <>
> >
> > Wilf Rigter mailto:wilf.rigter@powertech.bc.ca
> > tel: (604)590-7493
> > fax: (604)590-3411
> >
> > > -----Original Message-----
> > > From: Bumper314@aol.com [SMTP:Bumper314@aol.com]
> > > Sent: Wednesday, May 05, 1999 5:02 PM
> > > To: swilliam@cadvision.com; beam@corp.sgi.com
> > > Subject: Re: F#$@ beam
> > >
> > > In a message dated 5/5/99 4:58:02 PM Pacific Daylight Time,
> > > swilliam@cadvision.com writes:
> > >
> > > > maybe it has to do with that little problem that seems to come up a
> > lot,
> > > > just having enough voltage to keep the latch on, so it can not
> > > recharge, or
> > > > something like that, try your SE's under different light conditions.
> > >
> > > done that too, I have tried 55W and 65W incondesent, i tried a 40w
> > halogen
> > >
> > > lamp, a halogen 4 D battery mag light, 75W halogen flood light, and of
> > > course, the sun...
> > > STeve
> >
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