Alt-BEAM Archive
Message #09526
To: beam@sgiblab.sgi.com
From: "Timothy Flytcher" flytch@hotmail.com
Date: Tue, 25 Jan 2000 00:19:06 PST
Subject: [alt-beam] Re: Incredible gear motors
Ok I have a theoretical question for anybody/everybody... say I have a motor
in my hand... how could/would I determine torque??? the only thing that
comes to mind is a spring scale and a leaver arm... is this truly
accurate??? is there a better way???
Timothy...
>I don't have a handy way to measure the torque. At 2.5v it is pretty easy
>to stop the motor by hand, but at 5v it takes a fairly tight grip. Yes, I
>know, not exactly rocket science.
>>Just out of curiousity, what is the torque of these
>>motors?
______________________________________________________
9527 Tue, 25 Jan 2000 23:13:33 +1100 [alt-beam] New robot and FRED update beam "Ben Hitchcock"
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content-transfer-encoding: 7bit
All,
I have built another robot around the FRED solar engine. You can see it at:
http://wollongong.apana.org.au/~ben/seaplane/index.html
It's another matchbox conversion, this time a little seaplane. It doesn't
move itself, but the propellor spins around in little jerks.
Also, I've updated the FRED schematic. It's attached to this message. The
changes from the last version are:
1) You can now add touch sensors to the robot.
2) The low light performance is improved even more.
It is important to note that the FRED SE still suffers from the full sun
lockup problem. If you do decide to build it, make sure that the FLEDs
aren't going to receive full sun on them (paint the top black, or shield
them underneath a solar panel, or put heatshrink around them). But, you
still have to let a bit of light in because that's the only way that the
robot will know where to go!
Ben
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Attachment: schematic.gif
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9528 Tue, 25 Jan 2000 06:58:08 -0800 [alt-beam] Re: PSH V2 - havin fun "'beam@sgiblab.sgi.com'" Wilf Rigter The tutorial?
wilf
> -----Original Message-----
> From: Senior [SMTP:kyled@cruzers.com]
> Sent: Monday, January 24, 2000 8:43 PM
> To: Beam List
> Subject: PSH V2 - havin fun
>
> I know I'm a bit late, but.... :)
>
> My PSH V2 works great on the breadboard, but I just soldered it up on a
> proto board and it doesn't work at all! The LEDS are both full on (Or so
> it looks). No response from pot-tweeking, or disconnecting the second
> half of the circuit (The NU part, I beleive). All connections are
> checked and checked and checked! ANy one with similar results? Wilf?
>
> Thanks!
> Kyle
9529 Tue, 25 Jan 2000 07:05:58 -0800 [alt-beam] Re: PSH V2 - havin fun "'beam@sgiblab.sgi.com'" Wilf Rigter Hello Elmo...the PSH designer (Power Stuffed/Stupid/Screwed Head)
heheh!, and Kyle,
Since you went to all that trouble, I will try to duplicate your PSH
problems and give you the definite solution.
havin fun
wilf
> -----Original Message-----
> From: Elmo [SMTP:elmo@ilid.com.au]
> Sent: Monday, January 24, 2000 10:23 PM
> To: beam@sgiblab.sgi.com
> Subject: Re: PSH V2 - havin fun
>
> Yep....got the same problem....
>
> I spent weeks disecting Wilfs circuit in order to properly understand its
> operation. Did a white board or three full of schematic squiggles. Got a
> good design sorted out and working on my bread board.....super sensitive
> to
> my presence. It would detect me leaning in to adjust the trim pots when i
> was about a meter or more away from it. Drew up my design so i could wire
> up
> a chip bed with the circuit and.......NADA! Not a damn thing. The
> oscillation stage seems to keep ticking but the whole front end went dead.
> Months later i still haven't been able to get a replicated circuit working
> on a bread board like the old one did. I am doubting my own ability to
> reproduce my design. I am wondering if i had it wired all wrong on the
> bread
> board and _fluked it_ working.
>
> My inital wiring i did do wrong. I drew up my wiring diagram looking from
> the top down (like you do when you look at your breadboard), but when i
> wired it up i was working from the underneath of the chip socket and so
> had
> it all arse-backward......*DOH*
>
> My PSH hasn't been finished and its six months after i started it. Mid you
> i
> understand the design down to the last component.....but that does nothing
> for the moral.
>
> Elmo...the PSH designer (Power Stuffed/Stupid/Screwed Head)
>
9530 Sun, 23 Jan 2000 09:56:18 -0600 [alt-beam] Re: PSH V2 - havin fun beam@sgiblab.sgi.com SG -never could get solar to werk.
but head runs happily on batteries.
remember to place the 10uf cap b'tween 10 and twenty.
-sparky
At 07:05 AM 1/25/00 -0800, you wrote:
> Hello Elmo...the PSH designer (Power Stuffed/Stupid/Screwed Head)
>heheh!, and Kyle,
>
> Since you went to all that trouble, I will try to duplicate your PSH
>problems and give you the definite solution.
>
> havin fun
>
> wilf
>
>
>> -----Original Message-----
>> From: Elmo [SMTP:elmo@ilid.com.au]
>> Sent: Monday, January 24, 2000 10:23 PM
>> To: beam@sgiblab.sgi.com
>> Subject: Re: PSH V2 - havin fun
>>
>> Yep....got the same problem....
>>
>> I spent weeks disecting Wilfs circuit in order to properly understand its
>> operation. Did a white board or three full of schematic squiggles. Got a
>> good design sorted out and working on my bread board.....super sensitive
>> to
>> my presence. It would detect me leaning in to adjust the trim pots when i
>> was about a meter or more away from it. Drew up my design so i could wire
>> up
>> a chip bed with the circuit and.......NADA! Not a damn thing. The
>> oscillation stage seems to keep ticking but the whole front end went dead.
>> Months later i still haven't been able to get a replicated circuit working
>> on a bread board like the old one did. I am doubting my own ability to
>> reproduce my design. I am wondering if i had it wired all wrong on the
>> bread
>> board and _fluked it_ working.
>>
>> My inital wiring i did do wrong. I drew up my wiring diagram looking from
>> the top down (like you do when you look at your breadboard), but when i
>> wired it up i was working from the underneath of the chip socket and so
>> had
>> it all arse-backward......*DOH*
>>
>> My PSH hasn't been finished and its six months after i started it. Mid you
>> i
>> understand the design down to the last component.....but that does nothing
>> for the moral.
>>
>> Elmo...the PSH designer (Power Stuffed/Stupid/Screwed Head)
>>
>
>
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