We assume that your microcontroller is clocked at 10 MHz and has a 16-bit free-running counter. The sprinkler controller system controls two different zones by turning the sprinklers within each zone on and off. To turn on the sprinklers in a zone, the controller needs to receive a 152.589 Hz PWM signal from its microcontroller. To turn off the sprinklers in the same zone, the controller needs to receive the PWM signal with a different duty cycle. B.- After 15 min, your microcontroller must send the PWM signal with a 15% duty cycle of 10 ms to turn off the sprinklers in zone one.

A coffee maker has a full automatic feature. The coffee maker is in standby mode and starts when a start button is pressed, which generates a signal C. It sequences through the following stages: "mixing with milk", “adding sugar", and “dispense". There is a “no sugar" option switch D, which, if turned on, causes the coffee maker to jump from “mixing with milk" stage to “dispense" stage. When the start button is pressed, a timer begins ticking, which generates an output signal ST. The timer generates an input signal TE at the end of the time period, and then resets itself and starts again. Assuming that all stages take the same duration of time, design the coffee maker by including all the following items: • the state diagram • the state transition table • Boolean expressions for the next states and the output • the logic circuit

PWM is the method that; 1. Sends an encrypted message. 2. Brakes a motor. 3. Creates an equivalent analog effect from digital pulses. 4. Creates an equivalent digital effect from analog pulses. 5. Runs a motor in forward and backward.

24)A PLC scan cycle contains each of the following operations EXCEPT A)read inputs B)perform diagnostics & communication C)execute logic D)compile installed ladder logic program

Plc

1. Fill-in the blanks with the correct answer or chose the correct answer. the blue wire 1-3. Given a 3-wire NPN inductive sensor, the black wire is to be connected to the and the brown wire to the to the 4. After connecting the load to an NPN sensor, the other terminal of the load will be connected to the 5. If a PLC, serving as load, uses a sinking input card, it needs a (PNP/NPN) proximity sensor. 6. Capacitive, Inductive, Photo electric sensors are called proximity sensors because