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Subject: Re: Timer circuit design w/o 555?
References: <0001HW.B9D1935C02BEE5C71662EAD0@news.covad.net> <firstname.lastname@example.org>
X-Newsreader: Forte Agent 1.8/32.553
Date: Wed, 16 Oct 2002 12:39:04 -0400
NNTP-Posting-Date: Wed, 16 Oct 2002 12:39:13 EDT
Organization: Bell Sympatico
Now that you had plenty of suggestions in how to modify your timing
circuit, let me ask you , have you consider a different approach ?
Like a more "liberal" idea of giving the plants the best quantity of
water for their grow ?
Using the principle used by the meters they sell at the corner store
to measure the humidity one can design a circuit that maintains a
constant amount of humidity. That may not be the ideal condition but
electronically one can adjust to different specs.
This subject is of particular interest to me. Once I built a rotating
platform for a plant that periodically rotate the vase a few degrees.
The idea was to expose all the sides of the plant to a more equitable
amount of day light and consequently a better round plant.
I had no patience to wait for the number of the months required to see
the results and the project was shelved.
Now I am playing with mirrors and so far I have managed to make a few
interesting burning designs due to over exposure of light.
On Tue, 15 Oct 2002 19:05:05 GMT, email@example.com (Wouter van Ooijen
>>Any suggestions how I could achieve the same results without using the
>Use a microcontroller? A lowly 12F675 would be sufficient. But some
>programming will be required ;)
>Wouter van Ooijen
>PICmicro chips, programmers, consulting
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