Alt-BEAM Archive
Message #12080
To: beam@sgiblab.sgi.com
From: "Mike Kulesza" mikekulesza@hotmail.com
Date: Sat, 18 Mar 2000 18:30:32 GMT
Subject: [alt-beam] Re: NEW 2nd BORN A:\MVC-030X.JPG
I just have to say that that's a REALLY nice-looking bot!! wow
www.geocities.com/beambotix
______________________________________________________
12081 Sat, 18 Mar 2000 12:05:09 -0500 (EST) [alt-beam] PM1 SE beam@sgiblab.sgi.com jester96beam@iname.com I just finished a bot using the unicore circuit. It works really well from a power supply, but I can't seem to get the PM1 SE working properly. It uses all the same values as on BEAM-Online, but I used the TRZVN2106 from solarbotics instead of the 2N7000, a 0.33F gold cap, a 1381 J, and two 24x33mm solar cells in parallel.
The cap charges past 2.7V, and keeps going to about 3.3V. At that point I stopped it since the cap is only rated at 2.5V and it obviously wasn't going to trigger anyway. The cap was also a little warm, but only slightly.
I've checked the circuit and everthing appears to be right. One thing I wasn't sure of though is the diode. Is that a signal diode or a reguler diode? I used a signal diode cause that's all I had anyway.
Oh, all the components are brand new except the diode and the cap.
Thanks in advance
Chris
---------------------------------------------------
Get free personalized email at http://www.iname.com
12082 Sat, 18 Mar 2000 14:27:45 -0500 (EST) [alt-beam] Re: NEW 2nd BORN beam@sgiblab.sgi.com jester96beam@iname.com I agree, but some text would be nice! What circuit does it use? Does it turn? (has 2 feelers)
Chris
---- you wrote:
>
> I just have to say that that's a REALLY nice-looking bot!! wow
>
> www.geocities.com/beambotix
>
> ______________________________________________________
> Get Your Private, Free Email at http://www.hotmail.com
>
---------------------------------------------------
Get free personalized email at http://www.iname.com
12083 Sat, 18 Mar 2000 11:08:20 -0800 [alt-beam] Re: Aesthetics beam@sgiblab.sgi.com Bruce Robinson Justin wrote:
>
>Randy Howard wrote:
>
>> Print PCb's out, photostat em' onto trans, and since
>> carbon conducts electricity, pathways can be made.
>> components can be stuck by whatever means, like
>> conducting epoxy, or sticking another piece of plastic
>> onto the connections and melting em' , i.e. laminatin'
>> em'.
>> Would look nice if wrapped around caps, or motors :)
>> any comments? (or criticisms?) :)
>
> Just one - I don't think it will work :-)
> First test - does photocopy toner actually conduct? Does it do so
> without massive resistance?
An interesting idea, and worthy of a test. A complication is that
different brands and types of copiers/printers use different inks and
toners. I happen to have a transparency right here, with a PCB layout
printed on it, as well as some documents from identifiable sources.
Here you go, using an analog VOM, with the scale set to x10k (most
likely to show even a slight conductance) ...
- LED printer* on transparency material .... infinite resistance.
- Inkjet printer on paper ... infinite resistance.
- Xerox photocopier on paper ... infinite resistance.
- Canon photocopier on paper ... infinite resistance.
That's a pretty good spectrum ... you might be able to a specific brand
of photocopier or laser printer that has conductive toner, but I
wouldn't count on it.
Interesting idea, nevertheless.
Bruce
12084 Sat, 18 Mar 2000 11:07:31 -0800 [alt-beam] Re: Music wire beam@sgiblab.sgi.com Dave Hrynkiw > You can't find music wire? Check any hobby/craft store for a K&S
> display. They're everywhere.
It's also available (in Canada & the US) from industrial supply stores.
It typically comes in 1 lb rolls, for about $20 CDN in the smaller
sizes. Good if you are building a whole lot of robots, and also a
standard material for making custom springs.
Unlike all the other wire numbering systems (I know of 6 systems), music
wire diameter increases as the gauge number increases. A sampling of
sizes (lengths are approximate):
- 13 ga. = 0.031" = 1/32" = 385 ft (115 m) per lb
- 17 ga. = 0.039" = 1mm = 265 ft ( 75 m)
- 26 ga. = 0.063" = 1/16" = 95 ft ( 30 m)
- 30 ga. = 0.080" = 2mm = 60 ft ( 18 m)
- 33 ga. = 0.095" = 3/32" = 40 ft ( 13 m)
- 38 ga. = 0.118" = 3mm = 27 ft (8.2 m)
- 39 ga. = 0.124" = 1/8" = 24 ft (7.4 m)
- 43 ga. = 0.162" = 4 mm = 14 ft (4.6 m)
Music wire is both hard and stiff ... and in this form also has a slight
curvature. It's hard to get it dead straight. The hobby shop versions
are usually short, straight lengths. If you buy it by the roll, don't
forget that it's a tightly coiled spring in the package.
A final note ... there is a SECOND system of music wire (W & M music
wire gauge) which is ever so slightly different. The differences are
typically 0.002" in diameter or less.
Bruce
12085 Sat, 18 Mar 2000 12:58:56 -0700 [alt-beam] Re: Mark Tilden Tact(Mr.mark T please reply) beam@sgiblab.sgi.com Dave Hrynkiw At 03:04 AM 3/18/00 , Jason - wrote:
You can't find music wire? Check any hobby/craft store for a K&S display.
>>They're everywhere.
>thanks a lot dave but what is a K&S display........
K&S Tubing - they send displays of their product to almost every
craft/hobby store I've ever seen.
-Dave
---------------------------------------------------------------
"Um, no - that's H,R,Y,N,K,I,W. No, not K,I,U,U, K,I,_W_. Yes,
that's right. Yes, I know it looks like "HOCKYRINK." Yup, only
2 vowels. Pronounciation? _SMITH_".
http://www.solarbotics.com
12086 Sat, 18 Mar 2000 16:15:43 EST [alt-beam] Decrease motor voltage beam@sgiblab.sgi.com "Corey Centen" Is there anyway to decrease the voltage requirement of a motor? It will go
slower but require a smaller voltage. Does anyone know how?
______________________________________________________
12087 Sat, 18 Mar 2000 16:32:45 -0500 [alt-beam] Yes!! [not for advanced people with no time for beginner junk.....] "BEAM" "William Cox" Yes!! I got it working. My pvore! Oh, the exultation. Bwahaha. Believe it or
not, the FRED circuit really is phototropic. I'm happy.
-William
____________________________
http://robot-central.webjump.com/
Robotics books, projects, resources,
links, news, and more!
Home