Overview: Understanding the de-bounce switch circuitry
Resources to consult: Digital Electronics: Principles and Applications, 8th Edition, Chapter 5, Figure 5-14b
Instructions:
Build the circuit as shown in Figure 5-15b
Capture the output switch from high to low and low to high and paste into your document
At the bottom of your lab report, describe the operation of the de-bounce switch and give examples of the uses.
Week 2 Lab
Overview: Understanding the decoding circuitry of a BCD to seven segment display
Resources to consult: Digital Electronics: Principles and Applications, 8th Edition, Chapter 6
Exercise:
1. Construct a BCD to seven segment display circuit. Do not use a BCD to seven segment display chip!
2. Circuit should be constructed of AND, NOT OR etc. gates
3. Use switches for BCD input data
4. Describe operation of the circuit. Capture output of seven segment display with BCD switches in different positions.
Week 3 Lab
Overview: Understanding the counter circuit including reset
Resources to consult: Digital Electronics: Principles and Applications, 8th Edition, Chapter 8
Instructions:
1. Construct a 2 digit counter that counts from 00 to 60
2. You can use the BCD to seven segment display for the output
3. You can use a switch to clock the input or a clock pulse.
4. First digit will count from 0 to 9 (modulo 10 counter) and reset back to zero. Resetting to zero should clock the next chip to increment.
5. Second digit will count from 0 to 6 (modulo 6 counter) and reset back to zero.
6. Describe operation of the circuit. Capture output of seven segment display at various times
Week 4 Lab
Overview: Understanding the shift register constructed as a ring counter
Resources to consult: Digital Electronics: Principles and Applications, 8th Edition, Chapter 9
Instructions:
1. Construct a 6 position ring counter and output to a seven segment display outer LEDs (do not use center LED)
2. The lights should travel in a ring around the seven segment display
3. Hint: You do not want to use a BDC to seven segment decoder
4. Circuit will power up with one light on.
5. Pressing a switch will cause the ring counter to loop until the switch is released.
6. Describe operation of the circuit. Capture output of seven segment display at various times.
Week 5 Lab
Overview: Understanding a 2's complement 4 bit adder circuit
Resources to consult: Digital Electronics: Principles and Applications, 8th Edition, Chapter 10
Instructions:
1. Construct a 4 bit 2's complement adder circuit using discrete components (and, or, xoretc)
2. Display the result on 2 seven segment displays, one for sign and one for number
3. If the number if positive, use BCD to seven segment to display output
4. If the number is negative, invert every signal, use another 4 bit adder and add a one, then use a BCD to seven segment to display output
5. Describe operation of the circuit. Capture output of seven segment for max, min and in between values.
Week 6 Lab
Overview: Understanding memory
Resources to consult: Digital Electronics: Principles and Applications, 8th Edition, Chapter 11
Instructions:
1. Using the HM6116A120 (2Kx8 ram) create an addressable RAM circuit and perform the following:
2. Choose several address locations (not 0) and write the inverse of the address as data to that location.
a. Address is 0110 Data should be 1001
3. Read the memory in the following order: Read location 0 (this should be 0), Read the first location you wrote to, capture screen data, read the second location you wrote to, capture screen, etc.
4. Describe operation of the circuit. Capture output of seven segment for max, min, and in between values.
Week 7 Lab
Overview: Understanding D/A and A/D convertors
Resources to consult: Digital Electronics: Principles and Applications, 8th Edition, Chapter 14, Figure 14-12
Instructions:
1. Construct the digital meter as shown in Figure 14-12 in the book with the following modifications:
2. Instead of a seven-segment display, use a bar display that lights up the number of bars in the voltage
3. You will need to replace the BCD to seven-segment display and the display
4. If the voltage is 4 volts, bars 4, 3, 2, and 1 will be lit.
5. Describe operation of the circuit. Capture output of the bar display along with the input voltage display.
Week 8 Lab
The student will construct a digital alarm clock using basic logic components. The clock will consist of a timer circuit, a divide by 6 counter, a decade counter, and a display module. The alarm will be set by switches in BCD notation and the alarm itself will be instrumented by attaching a light which will illuminate when the alarm time and the clock time match.
Attachment:- Chapters fig.rar