Please answer and explain as many of these as you can. I have a final on Friday and my teacher gave us this review sheet but didn't go over it with us. Thanks!
Picture: http://i620.photobucket.com/albums/tt289/philpee2/electronicsreview001.jpg (the blurry numbers towards the top are 8 and 4)
1. Find the frequency if R1=47K, R2=10K and C1 = 3.3 micro F
2. Find the duty cycle
3. What happens to F and %D if both resistors are tripled?
4. What causes the out[ut to go high?
5. When is the threshold activated? What happens then?
6. Through which capacitor does C1 discharge through?
7. In what mode is the 555 being used here?
Picture: http://i620.photobucket.com/albums/tt289/philpee2/electronicsreview002.jpg
1. Which is the disallowed state? The memory state?
2. What will Q and Q-bar be in the disallowed state?
3. What will the outputs be if S=1 and R=0
4. How do you put this flip-flop into the reset state?
1. Write the decimal number 47 in binary. How is it written in BCD? (I know how to write it in binary, but I don't know what BCD is)
2. How is the number negative 3 written in two's complement?
1. How can a 0 to 5 counter be made? A 0 to 7 counter?
2. What will the display produce if Q2 is 0 all the time (because its grounded or broken)?
3. What can cause a 0 to 9 counter to produce blanks?
4. What would happen if the 4520 outputs (Q0 through Q3) are connected incorrectly to the 4511 inputs (D0 through D3)?
Picture: http://i620.photobucket.com/albums/tt289/philpee2/electronicsreview001.jpg (the blurry numbers towards the top are 8 and 4)
1. Find the frequency if R1=47K, R2=10K and C1 = 3.3 micro F
2. Find the duty cycle
3. What happens to F and %D if both resistors are tripled?
4. What causes the out[ut to go high?
5. When is the threshold activated? What happens then?
6. Through which capacitor does C1 discharge through?
7. In what mode is the 555 being used here?
Picture: http://i620.photobucket.com/albums/tt289/philpee2/electronicsreview002.jpg
1. Which is the disallowed state? The memory state?
2. What will Q and Q-bar be in the disallowed state?
3. What will the outputs be if S=1 and R=0
4. How do you put this flip-flop into the reset state?
1. Write the decimal number 47 in binary. How is it written in BCD? (I know how to write it in binary, but I don't know what BCD is)
2. How is the number negative 3 written in two's complement?
1. How can a 0 to 5 counter be made? A 0 to 7 counter?
2. What will the display produce if Q2 is 0 all the time (because its grounded or broken)?
3. What can cause a 0 to 9 counter to produce blanks?
4. What would happen if the 4520 outputs (Q0 through Q3) are connected incorrectly to the 4511 inputs (D0 through D3)?