Alt-BEAM Archive
Message #07766
To: beam@sgiblab.sgi.com
From: Lee Golden leemon1@yahoo.com
Date: Tue, 16 Nov 1999 15:28:00 -0800 (PST)
Subject: [alt-beam] Re: Chloroplast-o-mania!
Where are you guys (in the U.S.) ordering your MC34164
voltage triggers from?
Thanks for any info...
Lee Golden
__________________________________________________
Do You Yahoo!?
Bid and sell for free at http://auctions.yahoo.com
7767 Wed, 17 Nov 1999 10:21:43 +1100 [alt-beam] Re: Cholroplast thingy "'beam@sgiblab.sgi.com'" "Ben Hitchcock" As I found out with Alf, the only way to use LEDs as photodiodes is to
either use:
a) clear LEDs. These can be any actual colour (I tried red) but have a
clear lens. These put out up to a volt in sunlight.
b) yellow LEDs. These put out a fair bit less than clear LEDs, but still
work. Just ask Alf! You have to be pretty tricky to discriminate against
such small voltages with yellow LEDs, but it will work.
Green LEDs as you discovered just don't put out enough juice.
Good luck!
Ben
----------
>From: Wilf Rigter
>To: "'beam@sgiblab.sgi.com'"
>Subject: [alt-beam] Re: Cholroplast thingy
>Date: Wed, 17 Nov 1999 8:03 AM
>
>Finally tried it with green LEDs for photosensors and ... no go: the leds
>just don't have the photovoltaic oompf! I'l try PDs next.
>
>
> Wilf Rigter mailto:wilf.rigter@powertech.bc.ca
> tel: (604)590-7493
> fax: (604)590-3411
>
>> -----Original Message-----
>> From: Wilf Rigter [SMTP:Wilf.Rigter@powertech.bc.ca]
>> Sent: Tuesday, November 16, 1999 9:46 AM
>> To: 'beam@sgiblab.sgi.com'
>> Subject: RE: Cholroplast thingy
>>
>> This may work but it is untested. The PD or green LEDs act as photovolta=
ic
>> 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
>> >
>> > _____
>> >
>> > =A0
>> > Good day, BEAM cats!
>> > =A0
>> > I'm building some Christmas presents and I've hit a bit of a snag.=A0
>> > Attached is the hookup of the thing that I'm working on at the moment,
>> but
>> > both motors won't run.=A0 All that runs is one of them.=A0 If I unplug the
>> > running one, the non-running one runs.=A0 The motors that I'm using are
>> from
>> > CDROM drives.=A0 I think they are the ones that eject the CD.=A0 Any
>> > suggestions?
>> > =A0
>> > Richard Caudle
>> > www.geocities.com/frankendaddy <http://www.geocities.com/frankendaddy>
>> > Home ICQ - Frankendaddy
>> > =A0
>> > Guardians of the sacred words: Nee, Ptang, and NeeWhon!=A0=A0=A0=A0=A0=A0=A0=A0 <<
>> File:
>> > chloroplast2k.bmp >> << File: photochlor.gif >>
>
>------------------------------------------------------------------------
>A shopper=92s dream come true! Find practically anything on earth at eBay!
>Come and browse the more than 2 million items up for bid at any time.
>You never know what you might find at eBay!
>http://clickhere.egroups.com/click/1140
>
>-- Check out your group's private Chat room
>-- http://www.egroups.com/ChatPage?listName=ABeam&m
>
7768 Tue, 16 Nov 1999 15:43:08 -0800 [alt-beam] Re: Cholroplast thingy "'beam@sgiblab.sgi.com'" Wilf Rigter Thanks for the tip Ben!
Wilf Rigter mailto:wilf.rigter@powertech.bc.ca
tel: (604)590-7493=20
fax: (604)590-3411
> -----Original Message-----
> From: Ben Hitchcock [SMTP:beh01@uow.edu.au]
> Sent: Tuesday, November 16, 1999 3:22 PM
> To: 'beam@sgiblab.sgi.com'
> Subject: Re: Cholroplast thingy
>=20
> As I found out with Alf, the only way to use LEDs as photodiodes is =
to
> either use:
>=20
> a) clear LEDs. These can be any actual colour (I tried red) but have =
a
> clear lens. These put out up to a volt in sunlight.
>=20
> b) yellow LEDs. These put out a fair bit less than clear LEDs, but =
still
> work. Just ask Alf! You have to be pretty tricky to discriminate =
against
> such small voltages with yellow LEDs, but it will work.
>=20
> Green LEDs as you discovered just don't put out enough juice.
>=20
> Good luck!
>=20
> Ben
> ----------
> >From: Wilf Rigter
> >To: "'beam@sgiblab.sgi.com'"
> >Subject: [alt-beam] Re: Cholroplast thingy
> >Date: Wed, 17 Nov 1999 8:03 AM
> >
>=20
> >Finally tried it with green LEDs for photosensors and ... no go: =
the
> leds
> >just don't have the photovoltaic oompf! I'l try PDs next.
> >
> >
> > Wilf Rigter mailto:wilf.rigter@powertech.bc.ca
> > tel: (604)590-7493=20
> > fax: (604)590-3411
> >
> >> -----Original Message-----
> >> From: Wilf Rigter [SMTP:Wilf.Rigter@powertech.bc.ca]
> >> Sent: Tuesday, November 16, 1999 9:46 AM
> >> To: 'beam@sgiblab.sgi.com'
> >> Subject: RE: Cholroplast thingy
> >>=20
> >> 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.
> >>=20
> >> Wilf Rigter mailto:wilf.rigter@powertech.bc.ca
> >> tel: (604)590-7493=20
> >> fax: (604)590-3411
> >>=20
> >> <>=20
> >> > -----Original Message-----
> >> > From: Richard Caudle [SMTP:richard@cqc.com]
> >> > Sent: Saturday, November 13, 1999 10:15 AM
> >> > To: BEAM
> >> > Subject: Cholroplast thingy
> >> >=20
> >> > _____ =20
> >> >=20
> >> > =A0
> >> > Good day, BEAM cats!
> >> > =A0
> >> > I'm building some Christmas presents and I've hit a bit of a =
snag.=A0
> >> > Attached is the hookup of the thing that I'm working on at the
> moment,
> >> but
> >> > both motors won't run.=A0 All that runs is one of them.=A0 If I =
unplug
> the
> >> > running one, the non-running one runs.=A0 The motors that I'm =
using are
> >> from
> >> > CDROM drives.=A0 I think they are the ones that eject the CD.=A0 =
Any
> >> > suggestions?
> >> > =A0
> >> > Richard Caudle
> >> > www.geocities.com/frankendaddy
> <http://www.geocities.com/frankendaddy>
> >> > Home ICQ - Frankendaddy
> >> > =A0
> >> > Guardians of the sacred words: Nee, Ptang, and =
NeeWhon!=A0=A0=A0=A0=A0=A0=A0=A0 <<
> >> File:
> >> > chloroplast2k.bmp >> << File: photochlor.gif >>=20
> >
> =
>-----------------------------------------------------------------------=
-
> >A shopper's dream come true! Find practically anything on earth at =
eBay!
> >Come and browse the more than 2 million items up for bid at any =
time.
> >You never know what you might find at eBay!
> >http://clickhere.egroups.com/click/1140
> >
> >-- Check out your group's private Chat room
> >-- http://www.egroups.com/ChatPage?listName=ABeam&m
> >
7769 Tue, 16 Nov 1999 23:58:43 GMT [alt-beam] Re: BICORE POWER beam@sgiblab.sgi.com "Mike Kulesza"
website up but not comlete - robot not complete
>From: "Richard Caudle"
>Reply-To: beam@sgiblab.sgi.com
>To:
>Subject: Re: BICORE POWER
>Date: Mon, 15 Nov 1999 19:45:23 -0500
>
>Got a link so I can see yer 'bot?
>
>Richard
>
>
______________________________________________________
7770 Wed, 17 Nov 1999 00:03:46 GMT [alt-beam] SPLIT BICORE POWER beam@sgiblab.sgi.com "Mike Kulesza"
Can i run 5V to the 240 through a 7805 volateg regulator, and supply the
full 9V to the h-bridge?
that will keep the chip safe, and increase the motor power
______________________________________________________
7771 Wed, 17 Nov 1999 19:04:25 -0600 [alt-beam] Re: Cholroplast thingy beam@sgiblab.sgi.com SG Thanks Wilf!
Standing By!
-Sparkeeeholic
At 01:03 PM 11/16/99 -0800, you wrote:
>Finally tried it with green LEDs for photosensors and ... no go: the leds
>just don't have the photovoltaic oompf! I'l try PDs next.
>
>
> Wilf Rigter mailto:wilf.rigter@powertech.bc.ca
> tel: (604)590-7493=20
> fax: (604)590-3411
>
>> -----Original Message-----
>> From: Wilf Rigter [SMTP:Wilf.Rigter@powertech.bc.ca]
>> Sent: Tuesday, November 16, 1999 9:46 AM
>> To: 'beam@sgiblab.sgi.com'
>> Subject: RE: Cholroplast thingy
>>=20
>> 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.
>>=20
>> Wilf Rigter mailto:wilf.rigter@powertech.bc.ca
>> tel: (604)590-7493=20
>> fax: (604)590-3411
>>=20
>> <>=20
>> > -----Original Message-----
>> > From: Richard Caudle [SMTP:richard@cqc.com]
>> > Sent: Saturday, November 13, 1999 10:15 AM
>> > To: BEAM
>> > Subject: Cholroplast thingy
>> >=20
>> > _____ =20
>> >=20
>> > =A0
>> > Good day, BEAM cats!
>> > =A0
>> > I'm building some Christmas presents and I've hit a bit of a snag.=A0
>> > Attached is the hookup of the thing that I'm working on at the moment,
>> but
>> > both motors won't run.=A0 All that runs is one of them.=A0 If I unplug=
the
>> > running one, the non-running one runs.=A0 The motors that I'm using are
>> from
>> > CDROM drives.=A0 I think they are the ones that eject the CD.=A0 Any
>> > suggestions?
>> > =A0
>> > Richard Caudle
>> > www.geocities.com/frankendaddy <http://www.geocities.com/frankendaddy>
>> > Home ICQ - Frankendaddy
>> > =A0
>> > Guardians of the sacred words: Nee, Ptang, and NeeWhon!=A0=A0=A0=A0=A0=
=A0=A0=A0 <<
>> File:
>> > chloroplast2k.bmp >> << File: photochlor.gif >>=20
>
>
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