Q2 Robotics gdocs reviewer

• relay : an electricity-operated switch consisting of input terminals for single or multiple control signals and a set of operating contact terminals.
• counters : a device that stores (and sometimes displays) the number of times a particular event or process has occurred, often in relationship to a clock signal.
• up counter : increases the count for every rising edge of the clock.
• counters : are sequential circuits that count the number of pulses can be either in binary code or BCD form.
• timers : used to measure specific time intervals.
• on delay operation : in this mode of operation, the timer counts the output of the system after a specific interval of the specified delay.
• off delay operation : the timer starts its operation as soon as the input starts and the output is also started but the output of the timer is stopped once the set time of the timer has expired.
• the gate indicator light in cars is a basic example of an off delay timer
• microcontroller : It is a compact integrated circuit designed to govern a specific operation in an embedded system.
• control system : manages, commands, directs, or regulates the behavior of other devices or systems using control loops.
• open-loop control : is one in which the output does not feedback to the input to correct variations. Instead, the output is varied by varying the input.
• feedback control system : the applied input or controlling factor depends on the output of the system. 
• closed-loop system : also known as feedback control system, because in such systems comparison between input and achieved output is done to get the desired output signal.
• programmable logic controller : is an industrial computer that has been ruggedized and adapted for the control of manufacturing processes, such as assembly lines, machines, robotic devices, or any activity that requires high reliability, ease of programming, and process fault diagnosis.
• fixed/integrated/compact PLC : is most commonly called the Fixed I/O PLC.
• fixed I/O stands for fixed “input/output”
• modular PLC : is a type that allows multiple expansions of the PLC system through the use of modules, hence the term “modular”.
• a type of modular PLC is the rack mount PLC
• on-off control : is the simplest form of feedback control.
• A common example of on-off control is the temperature control in a domestic heating system.
• on-off controller : simply drives the manipulated variable from fully closed to fully open depending on the position of the controlled variable relative to the set point.
• fuzzy logic : attempts to solve problems with an open, imprecise spectrum of data and heuristics that makes it possible to obtain an array of accurate conclusions.