Alt-BEAM Archive
Message #10392
To: alt-beam@egroups.com
From: Ben A Micklin kcimb@juno.com
Date: Fri, 18 Feb 2000 09:00:45 -0600
Subject: [alt-beam] Re: photodiodes
WRONG! Radio SHack is enough for my simple needs of standard parts,
they have hords of stuff thier I wold love to try out on a 'bot. The only
thing is that they aren't the best parts source for "extreme BEAMers", so
I advise you to go and get them from places like Digikey, Jameco, BGM,
etc..
I wish Radio SHack carried the 2N3904 transistor, need one for my SE I'm
building.
They do have it, but only through RSU (Radio SHack unlimited), which
slaps a 2$ shipping charge on it.
Does anybody know of a easy tobuild 'vore that seeks out light? ('cept
for chiu's page)
~ben~
On Thu, 17 Feb 2000 20:35:16 EST BUDSCOTT@aol.com writes:
> hmm, ya know what. probably. i did see CdS photoelectric diodes, or
> whatever
> those things are, frankly they just don't have quite the quaity and
> anolouge
> charecteristics of PIN photodiodes. Oh well, kind of a tangent, like
> i said
> radio shack will never live up to what a BEAMer needs. oops!
>
> -Spencer
>
>
------------------------------------------------------------------------
> Learn more with SmartPlanet. It's a new way of learning online.
> SmartPlanet offers hundreds of courses to take on your time,
> in your space. Join for FREE today!
> http://click.egroups.com/1/1700/5/_/5594/_/950838794/
>
> -- Talk to your group with your own voice!
> -- http://www.egroups.com/VoiceChatPage?listName=alt-beam&m=1
>
>
________________________________________________________________
YOU'RE PAYING TOO MUCH FOR THE INTERNET!
Juno now offers FREE Internet Access!
Try it today - there's no risk! For your FREE software, visit:
http://dl.www.juno.com/get/tagj.
10393 Fri, 18 Feb 2000 08:55:12 -0600 [alt-beam] Re: Non-Beam Question and Rant alt-beam@egroups.com Ben A Micklin Wow, Quite some complicated stuff your son is using.
Check futurebots.com, and email the guy about power suplies, and tell him
this message. I think he told me a simple thing like youre wanting now,
only using a couple of 7805s.
~ben~
On Thu, 17 Feb 2000 23:24:40 -0500 David Simmons
writes:
> Hi Folks,
>
> This is not really BEAM related, but I could really use some help
> here. Until
> recently my son has been quite happy with a 500ma 12v power supply
> we built
> from a kit and/or batteries to power most of his projects. Recently,
> however,
> the supply went belly up and his projects are getting more complex,
> ie
> multiple 12v stepper motors, Op Amp circuits, BEAM, Robotic Arms,
> and so on.
> With this in mind his grandfather bought him a 13.8v 3amp supply.
> This works
> great for his stepper motor work, but he needs to limit the amps and
> drop the
> Voltage to +9v, -9v and +5v, -5v. Does anyone have a simple circuit
> using the
> 7805, 7809, 7905, 7909 regulators? Can I use ceramic resisters to
> kill some of
> the amps, so he stops blowing IC’s. He, of course, is really hoping
> to build
> something to solve his problem rather then spend all his budget on
> different
> power supplies.
>
>
>
> Thank You,
> David
>
> BTW This next part is a personal rant, feel free to ignore it
> entirely.
>
> In 1997 my son Kyle (then 6) was labelled a slow learner and I was
> told he
> would never make it in the “normal class room” will his peers. At
> first I was
> hurt, and scared, but then I got mad. The problem, as the teachers
> put it, was
> with communication. His printing was very poor, reading was nearly
> impossible,
> so we started working from the ground up. Every day for hours we
> worked. But
> nothing seemed to get him started, it was frustrating. But one day
> the VCR
> gave out, just died. Kyle wanted to take it apart, see what made it
> tick. I
> sat with him, let him hack away at it with my tools.
> He worked on the that VCR for a week, asking questions that I had
> no answer
> to, he ripped out a small motor and got it running with a battery,
> still more
> questions. So we started looking for answers. Books, Internet,
> anything we
> could find. The VCR still sat in parts while we tried to find out
> how the
> circuits worked, what made the motors start and stop. Then in the
> library one
> day I was reading about learning disorders while Kyle flipped though
> a picture
> book. The book talked about teaching a child to read using symbols
> in one
> chapter and later on about using something a child is interested in
> to promote
> learning. It was like a light bulb lighting up, we could use both.
> We started with simple circuits, a battery, a switch, a lamp. I
> would draw
> the circuit using standard symbols from a book and he would put the
> parts
> together and make it work. He built parallel circuits, series
> circuits, and
> gates, nor gates, anything I could find that could be build with
> switches and
> lamps. Soon he was drawing the circuits on his own. His grades
> started to go
> up in school.
> Next we moved onto a breadboard and discrete components, then ICs
> and
> soldering, and now Robots, especially BEAM. Robots Rising was like a
> defining
> moment in his young life, his drive in everything has changed. He is
> now a C
> or B Student, most of the time. A picture of his hero Mark T hangs
> over his
> desk, looking down from under his big hat as Kyle solders his latest
> project
> together. When it is done and working he holds it up as if he is
> really there
> and says. “It works, it works. See it follows that light.” His
> first head is
> working, and I mean the pun.
>
> Thank You Mark T.
>
>
------------------------------------------------------------------------
> Shabang!com is the place to get your FREE eStore, Absolutely FREE
> Forever. If you have any desires to sell your products or services
> online, or you want to expand your customer base for FREE, Come check
> out Shabang!com FREE eStores!
> http://click.egroups.com/1/1299/5/_/5594/_/950849293/
>
> -- 20 megs of disk space in your group's Document Vault
> -- http://www.egroups.com/docvault/alt-beam/?m=1
>
>
________________________________________________________________
YOU'RE PAYING TOO MUCH FOR THE INTERNET!
Juno now offers FREE Internet Access!
Try it today - there's no risk! For your FREE software, visit:
http://dl.www.juno.com/get/tagj.
10394 Fri, 18 Feb 2000 10:44:03 -0500 Cutting Perf Board
> Greetings BEAMers,
>
> To try something new and perhaps even find a building method I prefer
to
> free-forming, I've built the usual photopopper photovore on a Perf board.
I
> knew I'd need to cut it so I bought a X-acto Razor Saw. Guess what- that
> razor saw doesn't work so well. Not well at all. I had no idea perf board
was
> so hard to cut.
> The question is: How would I go about cutting this stuff? What methods do
you
> use?
>
> Thanks
> -Brien the TurtleTek
Home