Fuzzy logic multimeter - 1:

Together with the associated software, this circuit is not only a 3%-digit PC-controlled digital multimeter (DMM) with a plethora of bells and whistles, but also a very flexible measurement input for a control system based on fuzzy logic. Whether a sensor converts to current, voltage or resistance, the DMM can handle its output signal. Your sensor has a non-linear response? No problem for fuzzy logic. In the first two instalments we describe the PC-driven multimeter, while the last instalment will present a fuzzy logic control system that makes use of the present DMM.