Please compare drone technology to autonomous vehicles.

) Design a simple embedded system with PIC16F84A microcontroller (using 20MHz resonator). The system can drive a LED light on for 52.6ms on and 26ms off repeatedly. A watchdog timer should be enabled and have a time out period of 72 ms. Sketch the circuit and write the complete assembly program.

In C++

Demonstrate inheritance. Create an Airplane class with the following attributes: • manufacturer : string • speed : float Create a FigherPlane class that inherits from the Airplane class and adds the following attributes: • numberOfMissiles : short

Post a one paragraph summary about the different types of modulations used with modems. ( Pls no copy from the internet its just 1 paragraph )

1.15. Errors inherent in the device itself are called?

1) Application error

2) Characteristic error

3) Dynamic error

4) Sensitivity error

DSB:

Write the code for an m-file (script) to generate a DSB signal. The modulating (message) signal is a single tone signal with frequency 1kHz and the carrier frequency is 30kHz. Time Vector: 3001 points over range from 0 to 3ms (3 cycles of the modulating signal). Plot your original message signal both in time and its spectrum. (Note: use the cosine functions for your signals). In your report you should include the plots for the modulated signal in time and for the spectrum of the modulated signal.

AM:

For the same message signal and same carrier as in part a. write the code for an m-file to generate an AM signal. Do simulations for the following percentages of modulation: 1. 25% 2. 50% 3. 100% and 4.125%. In your report you should include the plots for the modulated signal in time and for the spectrum of the modulated signal for each of the 4 cases.

Discuss the results relative to the modulation index m.

SSB:

Use Matlab to implement a 4 pole-pair Butterworth band-pass filter to select the lower frequency component of the DSB modulated signal in part a. Plot the signal at the output of the filter in time and its spectrum.

Matlab filter responce and magnitude of filter question.

I have been working on this HW and I am not sure if I did something wrong. Here is my code.

%y[n]=x[n]+x[n-1]-x[n-4]-x[n-5];

%y[n]=y[n-1]-.9*y[n-2]+x[n]+x[n-1]

clear

clc

[x,fs] = audioread('toto.wav');

x = x(:,1);

dt = 1/fs;

t = 0:dt:(length(x)*dt)-dt;

plot(t,x); xlabel('Seconds'); ylabel('Amplitude');

num=[1 1 -.9];

den=[1 1 0 0 -1 -1];

sys=tf(num,den);

k=filter(num,den,x);

subplot(3,1,1);

plot(t,k);

title('filter response');

w=0:0.001:pi;

[h,om]=freqz(num,den,w)

m=20*log10 (abs(h))

an=angle(h)

subplot(3,1,2)

plot(om/pi,m)

title('mag spectrum of filter')

xlabel('freq')

ylabel('mag in db')

subplot(3,1,3)

plot(om/pi,an)

title('phase spectrum of filter')

xlabel('freq')

So I was playing around and when I use the 2nd equation at the top like in this code my filter response or the magnitude don't change. Why is that? Did I do something wrong? It doesn't even change if I change the values of the den either.

Say we have a transfer function that is H(s)= (2s^2-5s+3) / (s-1). Which of these statements is correct?

This system is stable, since one of its zeros is in the right-hand part of the s-plane

This system is stable, since one of its poles is in the right-hand part of the s-plane

This system is unstable, since its only zero is in the left-hand part of the s-plane

This system is stable, since its only pole is in the left-hand part of the s-plane

This system is stable, since one of its zeros is in the left-hand part of the s-plane

This system is unstable, since one of its poles is in the right-hand part of the s-plane

This system is stable, since its only zero is in the left-hand part of the s-plane

This system is unstable, since its only pole is in the right-hand part of the s-plane

All other answers are incorrect

Assume that a 50-Hz, 50-kVA, star-delta transformer bank of vector group Yd11 is accidentally paralleled with a 50-Hz, 50-kVA, star-star transformer bank of vector group Yy0. Both have a bank ratio of 2000/200-V. The equivalent impedances referred to the respective secondaries are ZΔ = 0.1106/60.2° Ω and ZY = 0.0369/60.2° Ω. (a) Assuming the load switch to be open, draw the connection diagram   (3.0 marks). (b) Determine the magnitude of the current circulating in each transformer secondary   (15.0 marks). (c) Express the current in (b) as a percent of the rated transformer current for each transformer   (2.0 marks).                                                                                  Use the method of mesh analysis applied to the three-phase circuits (marks will not be awarded for using the single-phase equivalent method). show all your steps

1-what is the best choice of a single phase motor for compressor?
a) a shaded pole motor
b) a split phase motor
c) a capacitor start induction motor
d) a capacitor run induction motor
e) a permanent split capacitor motor

2- Stepper motors typically operate with:
a) A single phase
b) Three phases (X,Y and Z)
c) 4 phases
d) 2 phases ( A and B)
e) The number of phases varies with the motor design

3- A 200 step stepper motor:
a) Has 200 poles
b) Has 100 poles on 2 phases
c) Has 4 poles on each of 2 phases
d) is not commercially available
e) is too complex to manufacture

4- When a stepper motor moves from one step to another:
a) The motor may overshoot
b) There is no possibility of overshoot
c) The overshoot will not exceed 1/2 step
d) A and C but not B
e) All of the above

5- The controller in an industrial servo motor system:
a) Is universal, any controller will work with any motor
b) Is always sold with the motor
c) Must be match to the motor according to manufacturer's recommendation
d) A and B
e) B and C

6- Industrial servo motor:
a) are not capable of holding a fixed position
b) have a holding torque that hold a fixed position with no movement
c) hold a fixed position by making small corrections as the load moves, resulting in small oscillations
d) are better than a stepper motor of holding a fixed position
e) do not have enough torque that hold fixed positions with no movement

7-Limit switches can be used:
a) with stepper or servo systems
b) can be used to prevent machine over travel
c) can be used to automatically set the 0 point for a motor controller
d) B and C
e) A, B and C

8- Stepper motors of the same faceplate sizebut longer length:
a) offer no difference in performance
b) generally run at higher speed
c) are generally capabe of producing more torque
d) generally run at lower speed
e) generally run at longer period of time

9- For an intermittent load, such as a manual lathe, which method should be used to size the motor:

a) The motor’s nominal size should match the minimum load
b) The motor’s nominal size should match the RMS horsepower calculated based on the anticipated loads
c) The motor’s nominal size should match the maximum anticipated load
d) Any available motor can be used, the operator will adapt their work methods

10- A motor is running at 90% of its nameplate voltage. Compared to running under the same condition at 100% of name plate voltage you expect the temperature to:

a) Increase
b) Decrease
c) Remain the same

11- A motor is running at 90% of its nameplate voltage. Compared to running under the same condition at 100% of name plate voltage you expect the current to:
a) Increase
b) Decrease
c) Remain the same

12- A motor is running at 90% of its nameplate voltage. Compared to running under the same condition at 100% of name plate voltage you expect the speed to:
a) Increase
b) Decrease
c) Remain the same

13- A motor is running at 110% of its nameplate voltage. Compared to running under the same condition at 100% of name plate voltage you expect the starting torque to:
a) Increase
b) Decrease
c) Remain the same

14- Motors with the same NEMA frame size are:
a) Electrically interchangeable (identical voltage and current ratings)
b) Mechanically interchangeable (same mounting hole locations and shaft size)
c) Mechanically interchangeable (same speed and horsepower rating)
d) Both electrically and mechanically interchangeable
e) The same colour

15- Which is not a component of a DC motor:
a) Field Winding
b) Squirrel Cage Rotor
c) Armature winding
d) Brushes
e) Commutator

16- In a permanent magnet DC motor the magnets take the place of the:
a) field Winding
b) Armature Winding
c) Bearings

17- If the field coil of a DC shunt motor is opened, the armature speed will __________.
a) increase
b) decrease
c) stay the same
d) runaway
e) stop

18- The __________ DC motor has the highest starting torque.
a)series
b)shunt
c) additive compound
d) subtractive compound
e) long shunt

19- Which of the following factors determine the synchronous speed of an AC motor?
a) inductance of the rotor windings
b)the frequency of the applied voltage
c) the number of field poles per phase
d) the physical load driven by the motor
e) both b and c

20- Which of the following inductance motors use a centrifugal switch?

a) resistance-start, induction-run
b) capacitive-start, induction run
c) shaded pole
d) a and b
e) b and c

Explain how a wireless client is de-authenticated.

In TDM, what do you think are some of the effects of increasing the number channels while holding the sampling rate constant?

An example of a PIC C program code for line following and obstacle avoiding robot? For it move forward and avoid an obstacle? PIC18F86722

4. Cross sectioning

a) Describe briefly the steps involved in a cross-sectioning procedure of an encapsulated sample.

b)Explain the differences between grinding ad polishing.

2, Die deprocessing.

a) Name TWO materials that typically made up the passivation layers.

b) Reactive Ion Etching (RIE) is a type of dry etching which is of plasma-based. With an aid of diagram, explain the mechanism of RIE.

c) Wet etching and dry etching are the most common die deprocessing techniques. Give TWO advantages and disadvantages of wet etching in form of tables.