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From: "Sir Charles W. Shults III"
References: <3dd9fae3.50578103@News.xtra.co.nz> <email@example.com>
Subject: Re: Logic simulator for kids
X-Newsreader: Microsoft Outlook Express 6.00.2600.0000
Date: Tue, 19 Nov 2002 16:25:53 GMT
NNTP-Posting-Date: Tue, 19 Nov 2002 11:25:53 EST
Organization: RoadRunner - Central Florida
"Gary Tait" wrote in message
> On Tue, 19 Nov 2002 09:45:29 GMT, firstname.lastname@example.org (Mike
> Harding) wrote:
> >Nah! Give him the breadboard and the real stuff.
> >You wouldn't give the son of a carpenter a picture
> >of a saw would you? :)
> But TTL instead, a little more forgiving IMO.
On this point I would agree. TTL is pretty much bullet proof. It can
directly drive LEDs at the outputs (and you really don't need much more than
that to demonstrate most working circuits to a kid) and it can be used without
worrying greatly over floating inputs. You can actually use the gates with no
more than some grounding wires, and this is something a kid can do easily.
You would be surprised at what you can build with a 7404 and a 7400.
My robotics, space and CGI web page - http://home.cfl.rr.com/aichip
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