Alt-BEAM Archive

Message #03031



To: beam@corp.sgi.com
From: "van Zoelen, Bram SSI-TSEA-352" Bram.A.A.vanZoelen@is.shell.com
Date: Thu, 6 May 1999 10:07:46 +0200
Subject: [alt-beam] Re: step by step FLED SE analysis ( was F#$@ beam)


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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