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PICList Thread
'PIC-related brainteaser'
1996\09\18@092723 by Clyde Smith-Stubbs

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Here's a PIC-related brainteaser, just to add fuel to the fire;

A device contains only two off-the-shelf components, is powered from
an external constant-voltage supply, and has an input-output transfer
function that looks like the first 180 degrees of a sine wave. The
output units are volts.

What are the input units, and how many digits are required to express
the full input range?

Bonus question - why is this PIC-related?

--
Clyde Smith-Stubbs       | HI-TECH Software,       | Voice: +61 7 3354 2411
spam_OUTclydeTakeThisOuTspamhitech.com.au      | P.O. Box 103, Alderley, | Fax:   +61 7 3354 2422
http://www.hitech.com.au | QLD, 4051, AUSTRALIA.   |
---------------------------------------------------------------------------
For info on the World's best C cross compilers for embedded systems, point
your WWW browser at http://www.hitech.com.au, or email .....infoKILLspamspam@spam@hitech.com.au

1996\09\20@094751 by Andrew David

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part 0 572 bytes

I don't suppose you'd tell me the answer if I asked nicely? ;-)

The question on Fast Forwards page (under "what we want") has a
simple answer. Squircle.

regards,

- Andy.


*************************************************************
Andrew David               Senior Project Engineer - Software

Ultronics Division         AndyspamKILLspamUltronics.co.uk
Ultra Hydraulics Ltd.
Anson Business Park
Cheltenham Road East
Staverton
Glos. GL2 9QN

Tel.: (01452) 858376 (Direct)  Ultronics Fax.: (01452) 858377
*************************************************************

1996\09\20@112704 by Clyde Smith-Stubbs

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Andrew David <.....AndyKILLspamspam.....ULTRONICS.CO.UK> wrote:

> Clyde,
>
> I don't suppose you'd tell me the answer if I asked nicely? ;-)

Well, since only Kalle has solved it so far, I will enlighten the
rest of you.

The input units are degrees rotation, and the number of digits
required is two - thumb and finger. (Or if you use
a slider pot, it's mm and one).

The two components are a pot and a resistor. The exact circuit
is left as an exercise for the reader :-)

Oh, the bonus question; the answer is nothing - I lied about
it being PIC related. Sorry :-)

--
Clyde Smith-Stubbs       | HI-TECH Software,       | Voice: +61 7 3354 2411
EraseMEclydespam_OUTspamTakeThisOuThitech.com.au      | P.O. Box 103, Alderley, | Fax:   +61 7 3354 2422
http://www.hitech.com.au | QLD, 4051, AUSTRALIA.   |
---------------------------------------------------------------------------
For info on the World's best C cross compilers for embedded systems, point
your WWW browser at http://www.hitech.com.au, or email infospamspam_OUThitech.com.au

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