Close up of pot and pully system for float down the inside of the pipe.
The creek is Antelope creek and runs from Penyrn through here and onto bigger places.
The Level device uses a float and on a rope and pulley system to
turn a variable resistor (10 turn pot).
A voltage is applied to the pot and is then measured by a analog to
digital device connected to a Macintosh computer through the ADB bus
cable.
|
Close up of pot and pully system for float down the inside of the pipe. |
|
|
|
|
There is a view of the creek as it enters the property from the north and flows South-East.
This is looking East - shows all the rocks I put in to prevent loosing more land.
When the pipe was installed in 97 it was on the east side of the creek where the main flow of the creek was but after several rains the creek changed its course. While this now ment there is more water in the creek than shown by the readout, it still told me when to worry about water being in danger of flooding the house.
To provide the data interface to the computer a analog to digital device was used that connects to the ADB buss. This converts the 0 to 5 volt dc level from the 10 turn pot to a 0 - 255 digital value that is used by the computer and converted to feet and inches for logging and web display.
Digital interface from ADB I/O
Weather instruments from Peet Bros. company
