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Sensing and Interfacing to the Outside World
Controlling the Outside World
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actuator address bus allow amplifier bar code binary number bits block byte chapter circuit circuitry clock common complete computer system connected control applications control system converted cost cycle data bus decoder described detector development system devices display electrical electronics encoder ensure EPROM example given hardware heaters hook I/O gates I/O lines important industry instance integrated circuits internal interrupt keyboard light look LSI I/O chip machine manufacturer mechanical membrane keyboard memory location method microswitch motor MPU system multiplexing needed normally operator interface opto-isolator output lines parallel communications parameters pattern position possible power supply problem process control processor produce pulses range relay resistor sensor serial serial communications shown in Figure simple single chip standard stepper stepper motor stored strain gauge switch temperature thermistor thermocouple thermoformer transistor TRIAC voltage voltage level weight