Question

Flip Flop project help.

(0-60) counter

Answer 1

Prompt: http://moodle2.bths.edu/pluginfile.php/52748/mod_resource/content/2/SixtySecondTimer.pdf

Answer 2

And the file is what i have done so far..

Answer 3

@ganeshie8 @dan815

Answer 4

So basically it can count from 0-60 fine..but no idea how to stop it at 60 and make a switch to reset and start the clock again..

Answer 5

what is your log in user name and password?
it is asking me to sign in

Answer 6

that's really weird. I actually don't know, lol. Can I take a screen shot?

Answer 7

its probably a school license login that i don't have a clue of what it is

Answer 8

a screenshot for anyone who needs it

Answer 9

what swrong with your circuit its working isnt it

Answer 10

does it work for you?

Answer 11

yeah

Answer 12

yeah, but i don't know how to make it stop at 60, and reset it to a switch so that one side makes it reset to 0 and the other side makes it start counting up again

Answer 13

as the prompt tells me to do

Answer 14

apparently you have to use an and gate somehow but i don't have a clue how

Answer 15

oh u want to stop it at 60? instead of resetting?

Answer 16

well it should stop at 60.

but also i need a switch that resets it/starts it again

Answer 17

ok then just make a switch

Answer 18

that breaks when the input is 60

Answer 19

60=32+16+8+4
11100

Answer 20

u need break at 11100

Answer 21

so feed all your lines through a not gate

Answer 22

does this include a switch?

Answer 23

NAND GATE

Answer 24

nand(bit6 and bit 5 * bit 4)

Answer 25

yeah u can attach a switch

Answer 26

basically that flips a not infront of it

Answer 27

like u can make a

Answer 28

NAND and OR gate and them gether

Answer 29

NAND or SWITCH

Answer 30

when switch is turned on it will continue

Answer 31

when it continues, it still stops at 60, though right?

Answer 32

do this

Answer 33

umm

Answer 34

and yah

Answer 35

u are basically trying to find a way to make it stop at 60

Answer 36

and ull start it back again with a switch

Answer 37

but the switch must clear everything back to 0 on one side as well

Answer 38

then start counting on the other

Answer 39

to stop at 60

Answer 40

"The Reset signal, when it is a logic zero, resets and holds the count at zero. When the
Reset signal is a logic one, counting is enabled. When the count reaches 60, the
counting stops."

Answer 41

if that makes more sense

Answer 42

u can do that

Answer 43

wait that doesnt work umm

Answer 44

if u stop the lowest bit then does evrything stop?

Answer 45

i havent used multisim in a while, can u do it for me

Answer 46

just put a switch at the lowest bit output and see what happens when u disconnect it while its running

Answer 47

so the switch connects to nothing on the other side? and is this for the d flop or jk?

Answer 48

ok yep that works

Answer 49

you tried it?

Answer 50

http://prntscr.com/6g3tm8

Answer 51

how about sticking a switch like that there

Answer 52

oh 1 more thing

Answer 53

if the clock is always 0, then it also freezes check that

Answer 54

its okay to take out the q not out of d for the first flop?

Answer 55

u wanna block clock input to make it halt

Answer 56

the clock is still going lol

Answer 57

ya u just wanna block the input to flipflop

Answer 58

no i mean i did the switch and the clock is still going past 60

Answer 59

does it stop when u open the switch

Answer 60

no lol

Answer 61

my teacher just mentioned something of how if you put a regular and gate with ground to the clock somehow, it will stop at a number. then you use ONE switch to connect both counters to do the reset

Answer 62

only problem is... u might not able to open myfiles since im on higher version

Answer 63

just remove ur d connection to qnot

Answer 64

d goes to q not through a switch thats the only difference

Answer 65

either way this is not what u want this is just to check

Answer 66

what u realla wanna do is make a nand gate now

Answer 67

with the highest 3 bits

Answer 68

highest 4 bits*

Answer 69

does an and gate ever come to play here?

Answer 70

yes basically the second it sees a 60, it will get stuck there which is what uw ant

Answer 71

since it will begin to output a 0 constant for d when it seens a 60 and it will freeze

Answer 72

this is what i did

the q not is not attached to d but it still keeps counting

Answer 73

i cannot open word docs u shud get lightshot

Answer 74

where are the logic components im tryin to find an and gate

Answer 75

just goto TTL and type and on the search

Answer 76

ill get light shot

Answer 77

i found that if you use a and gate attached to a ground and put it onto the first jk clock, it stops at 70

Answer 78

ya i noticed that too its because since its starting at 70 those are already turned on

Answer 79

what u need to do is add a or gate to make it go when the 7 is turned on which is only turned on at the beginning

Answer 80

then i'll stop at 60?

Answer 81

the counting to 60 part is working fine but

Answer 82

hmm

Answer 83

its the start thats all screwy

Answer 84

if only it didnt start at 70.. everything wud be fine

Answer 85

lol why does it start at 70.?

Answer 86

i think by default something is out putting high at the beginnning

Answer 87

yeah a lot of my classmates also started at 70 but apparently it doesn't matter

Answer 88

its not a problem

Answer 89

but hmm

Answer 90

lol this is a lot more tricky then my prompt makes it seem