Alt-BEAM Archive

Message #07854



To: beam@sgiblab.sgi.com
From: Wilf Rigter Wilf.Rigter@powertech.bc.ca
Date: Sat, 20 Nov 1999 10:52:38 -0700
Subject: RE: Cholroplast thingy



This may work but it is untested. The PD or green LEDs act as photovoltaic
generators and steer the 100K resistor current to the MPSA12 with the lower
light level. Try adding a little positive feedback by crosscoupling the
collectors to the opposite bases.

Wilf Rigter mailto:wilf.rigter@powertech.bc.ca
tel: (604)590-7493
fax: (604)590-3411

<>
> -----Original Message-----
> From: Richard Caudle [SMTP:richard@cqc.com]
> Sent: Saturday, November 13, 1999 10:15 AM
> To: BEAM
> Subject: Cholroplast thingy
>
> _____
>
>
> Good day, BEAM cats!
>
> I'm building some Christmas presents and I've hit a bit of a snag.
> Attached is the hookup of the thing that I'm working on at the moment, but
> both motors won't run. All that runs is one of them. If I unplug the
> running one, the non-running one runs. The motors that I'm using are from
> CDROM drives. I think they are the ones that eject the CD. Any
> suggestions?
>
> Richard Caudle
> www.geocities.com/frankendaddy <http://www.geocities.com/frankendaddy>
> Home ICQ - Frankendaddy
>
> Guardians of the sacred words: Nee, Ptang, and NeeWhon! << File:
> chloroplast2k.bmp >>


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