The idea of this project is to use an arduino to count every drop of water that goes through the water company meter.
For this project you will need:
– an arduino
– an ethernet shield + sd card (based on the W5100 chip)
– a proto shield
– a realtime clock (http://www.ebay.com/sch/i.html?_nkw=DS1307+Based+Real+Time+Clock)
– a shmitt trigger (e.g. 74C14N)
– a capacity (1 microF)
– some resitors (20kohm and about 100Kohm)
– a reed switch
– a reed switch-enabled water meter (Gioanola, about 75 euros http://www.gioanola.it/download/downen/08_eloutput_EN_HI.pdf)
The ethernet connection is used to answer a handful of basic http requests. A log of all water meter activity is saved on the SD card.
Using an SD card and an ethernet connection together has proven challenging (both use an SPI connection) until he used the W5100 chip based ethernet shield with an integrated SD card.
Great tutorial there: http://www.ladyada.net/learn/arduino/ethfiles.html
Source : http://www.instructables.com/id/Water-meter-Arduino-Aquameterduino-/
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