Design a colpitt oscillator circuit for a BFO Metal Detector

Design a differential amplifier using three 2N3904 transistors. Use the third transistor as acurrent source device. The differential transistors are to be biased at 10v and 10mA. Use Vcc of your choice and differential gain at 1KHz is to be 50.

Write a program to display (on 7-segment) continuous up-counting numbers from 00 to 99 (in decimal system) when switch SW2 is pressed and released, and down-counting when switch SW3 is pressed and released.

PLEASE CODE IN C.

PROVIDE ALGORITHM ALSO.

Research ways to measure temperature. Find at least five different ways to measure temperature, each based on a different physical process or parameter. Explain why you might choose this method to measure temperature, what are the strengths and constraint of each method? (Keep your customer in mind!)

DO NOT cut and paste descriptions of the thermometers from the web. Explain the measurement in your own words.

Develop at least 15 questions you would like to ask the customer to help clarify his needs and guide your design.

Give two examples of the tunning of PID controllers using the method based in the reaction curve (Ziegler Nichols)

We have an HID light fixture that has a luminous diameter of 18 inches. What is the number of footcandles found at a point that is 4.5 feet over from the center of the fixture and 12 feet down? The candlepower distribution curve for this fixture is as below in Table 1:

? - I

0 - 8564

5 - 8817

15 - 10964

25 - 12534

35 - 11845

45 - 9025

Table 1

Draw a block diagram of an elevator controller. Clearly identify inputs and outputs of each block. Assume the elevator has 4 floors. Draw a state diagram for the elevator controller and briefly explain what the input, state variables, and ouput represent.

C programming review excerises.

1. Write a function that counts the number of lines in a file, using the following declaration:
int countLines(char *filename)

2. Write a program that counts the number of words in a text file. Use the command-line
arguments to read the name of the file. The syntax:
countwords filename.txt

3. Write a program that counts the number of words starting with the first letter ‘T’ in a text
file. Using commend line argument for the text file. Syntax:
countWords filename.txt

4. Write a function that writes the multiplication table (from 1 to 9) to a given file in the
following format:
1 x 1 = 1 1 x 2 = 2 1 x 3 = 3 … 1 x 9 =9
2 x 2 = 4 2 x 3 = 6 2 x 4 = 12 … 2 x 9 = 18
3 x 3 = 9 3 x 4 = 12 3 x 5 = 15 … 3 x 9 = 27
…
9 x 9 = 81
Declaration of the function:
void printTable(char *filename)

5. Write a recursive function that computes the sum of all numbers from 1 to n for a given
n, where n is a non-negative integer. Declaration of the function:
int sum(int n)

6. Write a recursive function that finds and returns the smallest element in an array, where
the array and its size are given as parameters. Declaration:
int minimum(int array[ ], int n)

7. Write a recursive function that determines whether a given array is a palindrome. A
palindrome is a string of finite length that reads the same backward as forward.
Declaration: int isPalindrome(int array[ ], int beginning, int end)

8. Write a recursive function that prints even numbers in an array of integers where the
array and its length are given as parameters. Declaration:
void printEven(int array[ ], int len)
where len is non-negative.

9. Write a recursive function that prints the content of a character array in reverse order.
Declaration: void printReverse(char array[ ], int len)
where len is non-negative.

10. Write a recursive function that prints all integers in a given range between start and end
in increasing order.
Declaration: void printRange(int start, int end)
where start <= end+1.

11. Write a function that returns the index of the first occurrence of a given character c in
string str. If the character is not found, return -1.
Declaration: int indexOf(char *str, char c)

12. Write a function that returns the index of the first occurrence of the given substring sub in
string str.
Declaration: int indexOf(char *str, char *sub)
If the substring is not found, return -1.

13. Write a function that returns the index of the last occurrence of character c in string str.
Declaration: int lastIndexOf(char *str, char c)
If the occurrence is not found, return -1.

14. Write a function that returns the character at position idx in string str.
If idx is beyond the index inside str, return -1.
Declaration: char charAt(char *str, int idx)

15. Write a function that returns 1 if string str starts with the string sub, 0 otherwise.
Declaration: int startsWith(char *str, char *sub)

16. Write a function that returns a new string consisting of the sequence of characters
between the ith and jth index in the given string str. If this is not possible, return NULL.
Declaration: char *substring(char *str, int i, int j)

17. Write a function that takes as input a string and returns a new string consisting of
repeating each characters in str. For example, if str is “hello”, the returned string should
be “hheelllloo”;
Declaration: char *repeat(char *str)

18. Write a program that reads a list of x- and y-coordinates from a file and stores it in an
array of type Point (defined as a struct with x and y float members). You must use
typedef for the type Point. Assume the file contains at most 100 pairs of x- and y-
coordinates. Syntax:
readXY filename

19. Reimplement program #18 but use malloc to dynamically allocate the array. Malloc 100
pairs at a time. If the file contained more points than the allocated space could fit,
reallocate 100 more space into the array. Continue till the entire file is read. Syntax:
readXY filename

in communications. Make a table of FCC Emmision Classification

in communications. what is frequency spectrum based on ITU-R Rec V431-6?

Make a control diagram for a servo motor with 5 types of controllers and ramp input signal.

-Identify the output and choose an adequate response with stability.
-Specify which was the transfer function used.

a) A continuously alternating voltage will produce what type of ultrasound signal from a piezoelectric transducer? Give an equation to describe the output. b) Electrical voltage pulses applied to a piezoelectric transducer will produce what type of signal? Give an equation to describe the output. c) The addition of damping material to a transducer changes what parameters? Which are advantageous and which are disadvantageous? How are the disadvantages accounted for? d) What is the limiting factor for resolution of an ultrasound scan? Explain. e) What are the factors that limit the depth at which an ultrasound image can be collected? Explain

The ASCII lowercase letters are separated from the uppercase letters by 32. Thus, to
convert a lowercase letter to uppercase, subtract 32 from it. Use this information to write
a program that reads characters from the keyboard. Have it convert all lowercase letters
to uppercase, and all uppercase letters to lowercase, displaying the result. Make no
changes to any other character. Have the program stop when the user enters a period. At
the end, have the program display the number of case changes that have taken place.

Teacher i need in c++ and python please

k/(s^3+4s^2+4s+k)

find two values of gain that will yield closed-loop,

underdamped, second-order poles

1) Using M/S energy band diagrams, determine if Nickel (5.2 eV workfunction) or Indium (4.1 eV workfunction) can be used to make a Schottky diode on n-Si doped 3x1016/cm3