Alt-BEAM Archive

Message #08620



To: beam@sgiblab.sgi.com
From: pjm@excite.com
Date: Mon, 27 Dec 1999 21:48:28 -0800 (PST)
Subject: [alt-beam] Re: SALE




Im interested.. could you tell me more info thought?

ps why are you leaving?


> Hie all i think i am going off of them beam thinghy...i am selling all my

> stuff...i have 4 servo two airtronics and two from hitec...i will be
selling
> them at 7USD each...all modified......so if anyone is interested email
> me......
> ______________________________________________________
>


8621 Tue, 28 Dec 1999 20:53:21 +1100 [alt-beam] Distance/position measurement beam@sgiblab.sgi.com Rob
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The attached file comes from http://www.medonis.com/ultrasonic.html
Could there be a way to get a positive or negative output by summing the outputs
of two microphones similar to the circuit but without the chip?
Rob


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Attachment: ultrasonic1 from Medonis.com.gif

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8622 Tue, 28 Dec 1999 06:32:26 -0800 (PST) [alt-beam] Re: cap basics beam@sgiblab.sgi.com Daniel Grace
The formulae are the exact reverse of resistors.

Series:

1/Ct = 1/C1 + 1/C2

Parallel:

Ct = C1 + C2

~Daniel


--- David Perry wrote:
> nope, first the cap would be 10uf of 10 farad
> (1,000,000 uf in a farad). By
> hooking them up in parallel you increase their
> storage, but in series you
> increase their voltage and decrease their storage.
> I'm not sure on the exact
> equation for working these out but some one around
> here will know.
> The cap will charge up on just about any power
> source, but i've found with a
> 1381L you'll need two 22x24 suncerams to make the SE
> work. Just about any
> cap with a voltage of 2.5 volts upwards and a
> capacity of 2200uf will work.
>
> hope this helps,
>
> David Perry
>
> -----Original Message-----
> From: Blumojo13@aol.com
> To: beam@sgiblab.sgi.com
> Date: Tuesday, 28 December 1999 2:17
> Subject: cap basics
>
>
> >Can someone fill me in on some basic questions?
> Caps can be connected in
> >parallel but not in series, right? Now if you
> hooked a 10K 6.3volt cap to a
> >1381L SE would this cap fully charge if your power
> source was adequate? How
> >do you determined which cap will work on any
> particular application?
> >
> Blumojo13
>
>


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8623 Tue, 28 Dec 1999 12:29:12 -0600 [alt-beam] FLED photovores "Beam@Sgiblab. Sgi. Com" "Phillip A. Ryals"
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Hi everyone.

I've had absolutely no success in finding a 1381 voltage detector locally,
so I was going to put together a ciruit using a FLED instead. But I can't
find any actual photovore cicuits that use a FLED. Does anyone have a
pre-made schematic, or at least a hint on how to do this?

I've never been completely clear on *exactly* how the 1381 works in the
circuit, so I'm clueless on how to improvise.


Thanks,
Phillip


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>
 

class=3D800082518-28121999> 


class=3D800082518-28121999>Thanks,


class=3D800082518-28121999>Phillip




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