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Re:Use of Aquadyne controllers
Peter W O'Dwyer wrote;
>I have been considering building my own using an inexpensive PC,
>specifically, the PLCDirect DL405 and DirectSoft software. However,
>very expensive solution (~$2K) and will require a lot of programming.
>anyone used a PLC to automate all systems on there aquarium? If so,
>did you interface the pH probe and perform calibrations?
I don't know what a DL405 is but MPJA(www.mpja.com) sells a PC data
acquisition kit for $170 or $180 assembled. It plugs into the
parallel port, monitors 16 digital inputs, 11 analog inputs(0-5vdc,
10bit ADC) and has 8 digital outputs. With the rapid obsolesce of
computers you should be able to pickup a useable computer for less
than $100. Obviously it will require some understanding of
electronics and computers to use this approach but it would be an
interesting project and would cost no where near $2k.