This is a multi-channel ADC - which requires that you have to both send
signals from the PC (to select the channel) as well as fetch the
information from the device. A single channel ADC will be a lot simpler
- unless you need multiple inputs. A single ADC can be connected easily
to the parallel port of a PC. A multi-channel one is much more
complicated in hardware and software.
To drive a fan, you can use a solid state or mechanical relay to switch
the fan on and off, controlled by one of the output lines of the
parallel (printer) port.
You have a wide range of languages to use. C++ is the most usual. I
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