I am trying to build a sistem for measuring , control and command in the
house. There are consumption of
any kind of energy (electric, oil, gas..), water... , statistic, and so on,
and so on..
In my mind i have two sort of signals which i have to bring to PC. First
signal is very low frequency (0,01Hz
to about 10Hz) TTL, and it's frequency is not stable. I mean first channel
is measuring kWh ( by special sensor-
1pulse = 1kWh), so at low consimption there's 1 pulse on a minute (or even
more than one minute), but at high consumption there's maybe one pulse at
the second ( or even more than one pulse at the second), so this line must
be readeble all the time.
Second signal is olso TTL signal, frequency between 1 to 4kHz
and it is
multiplex of 16 diferent signals. This line could be readeble once at the
second (no need faster), parallel of this line are 4 lines (adress of the
multiplexer) and must be readeble at the same time (needed for the
demultiplexer in softwear).
For output i need eight diferent digital signals (simply ON/OFF).
I am shure, it's interested for many of users of LabVIEW and want to do some
experiments for low price.
(WIN98, LabVIEW 6.1, Pentium 166 MMX,Motherbord Chaintech 430TX chipset ,
ECP parallel port)
Thanks for help!
Joe
