For successful process control, the parameter to be controlled should be sensed by a suitable sensor, converted
into a signal which will truly represent the parameter and present it to the controller for further action. Signal
conditioning using passive circuits are extensively used for many years. As microcontroller can not recognize
voltage beyond 5 Volt, so it is necessary to convert the voltage signal into 0-5Volt range. In this present research
work we have designed a Sensor analog signal conditioning circuit shown in Fig.4. that converts 0-12Volt output
signal of the tachogenerator into 0-5Volt for each variation in the process variable (speed of the DC Motor).