On Sat, 1 Feb 2003 11:22:38 +0200, Peter L. Peres wrote:


That is precisely what I did, and with the dip in the water yes the capacitance changed from about 10pF to 20nF, however the 74LS132 refused to oscillate and the 4093BE didn't do much better.

My optical approach failed completely, I probably should have modulated the infra-red beam.

And for moisture detection, I have found a pair of stainless steel dough hooks work admirably with my current set up.

Colin


What kind of rain detector ? The kind with a funnel that leads to a
bootle
where you measure what fell ? The level sensor I described above works
fine, the last time I used it I used a sensor ready made and I made
the
electronics. There is nothing magical about the sensor. If you don't
believe how well it works quickly build one on perfboard and dip it
into a
glass of water. That's how I tested it out first (I am very wary of
great
claims of performance and check everything I have time to).


--
cdb, bodgy1@optusnet.com.au on 01/02/2003

I have always been a few Dendrites short of an Axon and believe me it shows.

Light travels faster than sound. That's why some people appear bright until they speak!

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