Q21. What is the drive output frequency when switch S1 only is closed and the analog inputs are connected to a potentiometer set to its 80% maximum position (8V analog input)? Asume that the potentiometer allows for a speed range from zero speed to maximum (70Hz) speed as the input voltage ranges from 0V to 10V. (a) 18 Hz (b) 35 Hz (c) 52 Hz (d) 56 Hz (e) 70 Hz Q22. What is the drive output frequency when switches S1, S4, S5 and S6 only are closed?

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Up-down counter

In digital logic and computing, a counter is a device that stores (and sometimes displays) the number of times a particular event or process has occurred, often in relationship to a clock. A sequential digital logic circuit is the most common type with an input line or clock and multiple output lines. In the binary or binary-coded decimal (BCD) number system, the values on the input line represents a number by several flip-flops connected in a cascaded manner. They are manufactured as separate integrated circuits and are widely used components in digital circuits. These are also a part of larger integrated circuits. These are a specific type of sequential circuit like registers or the value of the flip-flops serving as the output.