Alt-BEAM Archive
Message #13738
To: beam@sgiblab.sgi.com
From: beam@sgiblab.sgi.com
Date: Thu, 20 Apr 2000 11:11:43 EDT
Subject: model electric car kits
nice little car kits
http://transtronics.com/Kits/scooters.htm
13739 Thu, 20 Apr 2000 08:31:59 -0700 RE: Servo Controler "'beam@sgiblab.sgi.com'" Wilf Rigter
Try this for less parts
<>
The binary inputs IN1 and IN2 control the PWM as follows.
0 0 = CW
1 0 = CENTER
0 1 = CCW
1 1 = HOLD
The HOLD function forces the PWM output low and the servo will remain in
it's present position for a short while.
Raising the ENABLE line high forces the PWM output high and is probably not
very useful.
wilf
> -----Original Message-----
> From: Richard Piotter [SMTP:richfile@rconnect.com]
> Sent: Wednesday, April 19, 2000 9:20 PM
> To: Twin Cities Robotics Group; BEAM
> Subject: Servo Controler
>
> Does this circuit look decent?
>
> 1x 74HC14 (6 inverter gates)
> 1x 74xx00 (3 NAND gates)
> 1x 74xx08 (2 AND gates)
> 3x Silicon Switching Diodes
> 3x Multiturn Potentiometer
> 2x Small Value Resistors
> 2x Capacitors
>
> ___
> ,----|>o--| \
> | | |o--|<--o--/\/\/---.
> | o--|>o--|___/ | ^ |
> | | |____| |
> | | ___ |
> o----|>o--| \ |
> | | | |o--|<--o--/\/\/---o
> | o-------|___/ | ^ |
> In | | |____| |
> A | | ___ |
> O--o---------| \ |
> | | | |o--|<--o--/\/\/---o
> O----o--|>o--|___/ | ^ |
> In | | |____| |
> B | | ___ |
> o---------| \ |
> | | |--. |
> '-------|___/ | ,--/\/\/--o--/\/\/--.
> | | |
> | o----|>o-----||-----o
> ___ | | |
> / |--' '-----||--o--o<|----'
> O------------| | |
> Servo \___|------------------'
>
>
>
>
>
>
>
>
>
> --
>
>
> Richard Piotter The Richfiles Robotics & TI web page:
> richfile@rconnect.com http://richfiles.calc.org
>
> -- Make Money by Simply Surfing the Net or responding to E-Mail!!!
> -- Click below!!!
>
> http://www.alladvantage.com/go.asp?refid=ATL147
> http://www.spedia.net/cgi-bin/dir/tz.cgi?run=show_svc&fl=8&vid=329630
13740 Thu, 20 Apr 2000 11:43:21 EDT Re: Solarizing beam@sgiblab.sgi.com JVernonM@aol.com In a message dated 4/20/00 5:41:00 AM Eastern Daylight Time,
JAF60@student.canterbury.ac.nz writes:
Hey Justin'
I remember your post and it's what got my mojo going.
> The problem was that setting the D1 to the sensitivity required to
> notice
> the shadow (in an otherwise very bright environment) caused serious
> charging losses.
Yep. That's always the problem. It comes on like a heat element in a toaster
depending on a wide range of light levels. A low burn off is easy in slightly
less than bright conditions. I would think something like a combination of
Wilf's SIMD1 and the original would be the ticket. A D1 that comes on at the
light levels of a moderate shadow or more, and snaps on when activated. The
SIMD1 as I understand it only comes on in very dark conditions. Hey
Wilfmiester, can a SIMD1 be configured to snap on at higher light levels. I
know it will work backwards :). Coming on in light and charging in the dark,
but to a solar bot, that's about as useful as teats on a boar hog.
It's 80 degrees today and the Savannah sun is high and strong. This is a
great place to build solar bots!
See ya,
Jim
http://www.geocities.com/SoHo/Exhibit/8281/beamart.html
ICQ# 55657870
13741 Thu, 20 Apr 2000 11:57:45 -0500 Quadrapod 6Nv Microcore-Autostart PNC BEAM Richard Piotter Isn't there a diode based PNC that will keep an Nv loop opperating with
only 1 pulse? I remember 2, and I think one could be scaled up to larger
loops (like 6 Nvs).
Anyone want to point me in the right direction?
--
Richard Piotter The Richfiles Robotics & TI web page:
richfile@rconnect.com http://richfiles.calc.org
-- Make Money by Simply Surfing the Net or responding to E-Mail!!!
-- Click below!!!
http://www.alladvantage.com/go.asp?refid=ATL147
http://www.spedia.net/cgi-bin/dir/tz.cgi?run=show_svc&fl=8&vid=329630
13742 Thu, 20 Apr 2000 12:03:23 -0500 Re: Servo Controler beam@sgiblab.sgi.com Richard Piotter HAHAHA!!!I just threw that idea at another list (maybe It got sent here
too, but I'm not sure).
Anyway, as usual, Wilf comes to the rescue with yet another idea, just
in time to keep us from redoing it ourselves! (I actualy had it in my
head, just not on paper! :)
Thanks!
Wilf Rigter wrote:
>
> Try this for less parts
>
> <>
>
> The binary inputs IN1 and IN2 control the PWM as follows.
>
> 0 0 = CW
> 1 0 = CENTER
> 0 1 = CCW
> 1 1 = HOLD
>
> The HOLD function forces the PWM output low and the servo will remain in
> it's present position for a short while.
> Raising the ENABLE line high forces the PWM output high and is probably not
> very useful.
>
> wilf
>
> > -----Original Message-----
> > From: Richard Piotter [SMTP:richfile@rconnect.com]
> > Sent: Wednesday, April 19, 2000 9:20 PM
> > To: Twin Cities Robotics Group; BEAM
> > Subject: Servo Controler
> >
> > Does this circuit look decent?
> >
> > 1x 74HC14 (6 inverter gates)
> > 1x 74xx00 (3 NAND gates)
> > 1x 74xx08 (2 AND gates)
> > 3x Silicon Switching Diodes
> > 3x Multiturn Potentiometer
> > 2x Small Value Resistors
> > 2x Capacitors
> >
> > ___
> > ,----|>o--| \
> > | | |o--|<--o--/\/\/---.
> > | o--|>o--|___/ | ^ |
> > | | |____| |
> > | | ___ |
> > o----|>o--| \ |
> > | | | |o--|<--o--/\/\/---o
> > | o-------|___/ | ^ |
> > In | | |____| |
> > A | | ___ |
> > O--o---------| \ |
> > | | | |o--|<--o--/\/\/---o
> > O----o--|>o--|___/ | ^ |
> > In | | |____| |
> > B | | ___ |
> > o---------| \ |
> > | | |--. |
> > '-------|___/ | ,--/\/\/--o--/\/\/--.
> > | | |
> > | o----|>o-----||-----o
> > ___ | | |
> > / |--' '-----||--o--o<|----'
> > O------------| | |
> > Servo \___|------------------'
> >
> >
> >
> >
> >
> >
> >
> >
> >
> > --
> >
> >
> > Richard Piotter The Richfiles Robotics & TI web page:
> > richfile@rconnect.com http://richfiles.calc.org
> >
> > -- Make Money by Simply Surfing the Net or responding to E-Mail!!!
> > -- Click below!!!
> >
> > http://www.alladvantage.com/go.asp?refid=ATL147
> > http://www.spedia.net/cgi-bin/dir/tz.cgi?run=show_svc&fl=8&vid=329630
>
> ------------------------------------------------------------------------
> Name: SERVOLOGIC.gif
> SERVOLOGIC.gif Type: GIF Image (image/gif)
> Encoding: base64
--
Richard Piotter The Richfiles Robotics & TI web page:
richfile@rconnect.com http://richfiles.calc.org
-- Make Money by Simply Surfing the Net or responding to E-Mail!!!
-- Click below!!!
http://www.alladvantage.com/go.asp?refid=ATL147
http://www.spedia.net/cgi-bin/dir/tz.cgi?run=show_svc&fl=8&vid=329630
13743 Thu, 20 Apr 2000 12:09:51 -0500 Re: Servo Controler beam@sgiblab.sgi.com Richard Piotter Just one question? You can use the 7404 like that? Didn't realize that!
I'll have to grab a couple & expiriment.
Wilf Rigter wrote:
>
> Try this for less parts
>
> <>
>
> The binary inputs IN1 and IN2 control the PWM as follows.
>
> 0 0 = CW
> 1 0 = CENTER
> 0 1 = CCW
> 1 1 = HOLD
>
> The HOLD function forces the PWM output low and the servo will remain in
> it's present position for a short while.
> Raising the ENABLE line high forces the PWM output high and is probably not
> very useful.
>
> wilf
>
> > -----Original Message-----
> > From: Richard Piotter [SMTP:richfile@rconnect.com]
> > Sent: Wednesday, April 19, 2000 9:20 PM
> > To: Twin Cities Robotics Group; BEAM
> > Subject: Servo Controler
> >
> > Does this circuit look decent?
> >
> > 1x 74HC14 (6 inverter gates)
> > 1x 74xx00 (3 NAND gates)
> > 1x 74xx08 (2 AND gates)
> > 3x Silicon Switching Diodes
> > 3x Multiturn Potentiometer
> > 2x Small Value Resistors
> > 2x Capacitors
> >
> > ___
> > ,----|>o--| \
> > | | |o--|<--o--/\/\/---.
> > | o--|>o--|___/ | ^ |
> > | | |____| |
> > | | ___ |
> > o----|>o--| \ |
> > | | | |o--|<--o--/\/\/---o
> > | o-------|___/ | ^ |
> > In | | |____| |
> > A | | ___ |
> > O--o---------| \ |
> > | | | |o--|<--o--/\/\/---o
> > O----o--|>o--|___/ | ^ |
> > In | | |____| |
> > B | | ___ |
> > o---------| \ |
> > | | |--. |
> > '-------|___/ | ,--/\/\/--o--/\/\/--.
> > | | |
> > | o----|>o-----||-----o
> > ___ | | |
> > / |--' '-----||--o--o<|----'
> > O------------| | |
> > Servo \___|------------------'
> >
> >
> >
> >
> >
> >
> >
> >
> >
> > --
> >
> >
> > Richard Piotter The Richfiles Robotics & TI web page:
> > richfile@rconnect.com http://richfiles.calc.org
> >
> > -- Make Money by Simply Surfing the Net or responding to E-Mail!!!
> > -- Click below!!!
> >
> > http://www.alladvantage.com/go.asp?refid=ATL147
> > http://www.spedia.net/cgi-bin/dir/tz.cgi?run=show_svc&fl=8&vid=329630
>
> ------------------------------------------------------------------------
> Name: SERVOLOGIC.gif
> SERVOLOGIC.gif Type: GIF Image (image/gif)
> Encoding: base64
--
Richard Piotter The Richfiles Robotics & TI web page:
richfile@rconnect.com http://richfiles.calc.org
-- Make Money by Simply Surfing the Net or responding to E-Mail!!!
-- Click below!!!
http://www.alladvantage.com/go.asp?refid=ATL147
http://www.spedia.net/cgi-bin/dir/tz.cgi?run=show_svc&fl=8&vid=329630
13744 Thu, 20 Apr 2000 10:11:31 -0700 RE: Solarizing "'beam@sgiblab.sgi.com'" Wilf Rigter
Hi Jim,
This is the venerable D1 circuit but the diode has been replaced with a
2N3904 transistor. It can be used just like the D1 but turn-on is not so
mushy and it switches rapidly when the light drops just a little. The 1M
resistor across the solar cell can be changed to a smaller value (ie 100K)
to adjust sensitivity and make it turn on even faster.
<>
regards
wilf
> -----Original Message-----
> From: JVernonM@aol.com [SMTP:JVernonM@aol.com]
> Sent: Thursday, April 20, 2000 8:43 AM
> To: beam@sgiblab.sgi.com
> Subject: Re: Solarizing
>
> Hey
> Wilfmiester, can a SIMD1 be configured to snap on at higher light levels.
> I
> know it will work backwards :).
13745 Thu, 20 Apr 2000 08:58:39 -0600 Re: BiCore Occilator (Another idea) beam@sgiblab.sgi.com Eric Seale >i'm using them for IR proximity sensing too,
>>although i just used a 555 timer.
>
>How did you use a 555? Could you send me a schematic?
Oooooohhhh! *PLEASE* post this to the list (inquiring minds want to read...).
Thanks,
Eric
--------------------------------------------------------------------------------
Eric Seale | "Time is a great teacher, but unfortunately it
| kills all its pupils."
Eric.Seale@pobox.com | - Hector Berlioz (1803-1869), French composer
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