# I want to design using by cascading 74*163 ic

#### Atakan

Dec 18, 2016
11
I want to design such as count at 33 start and run 77 reset.
Is it true my image?

#### Attachments

114 KB · Views: 68
Last edited:

#### (*steve*)

##### ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd
Moderator
Jan 21, 2010
25,510
I think you want this.

#### Atakan

Dec 18, 2016
11
I think you want this.
how can i interconnect a b c d and Qa Qb Qc Qd, such as where 33? and where 77?

#### Atakan

Dec 18, 2016
11
I want to design such as 33,34,35,36,37,38......74,75,76,77 and finishing.
secondly 33,34,35,36,37,38...74,75,76,77,33,34,35,36,37......
is it true?

#### Attachments

114 KB · Views: 76

#### (*steve*)

##### ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd
Moderator
Jan 21, 2010
25,510
I'm sorry,. I can't understand what you want.

#### Atakan

Dec 18, 2016
11
I'm sorry,. I can't understand what you want.
i want to design counter 33 to 77. but i want just using 74*163. because i am not sure what i do.

Dec 18, 2013
5,178
Thanks

#### Atakan

Dec 18, 2016
11
Thanks
I have an exam. A question will be cascading counters and digital 74x163. Such as this is starting at count 33 and finishing 77 otherwise starting at count 0 and finishing 80
Etc. I could not do this question i could not draw with my hand. I am just doing 0- 15 at counting circuit

#### (*steve*)

##### ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd
Moderator
Jan 21, 2010
25,510
First you need to understand how to cascade the devices so you can count to a higher number than 15.

Then you need to understand how to load a number into them.

Then you need to work out the logic to decide if you have reached a certain maximum count.

You might want to look for an 8 bit magnitude comparator as that will make the last part easier.

#### Herschel Peeler

Feb 21, 2016
401
I want to design such as count at 33 start and run 77 reset.
Is it true my image?

Pins 1, 2 and 9 have no input. Yes, they need to be connected together, but they need an input from something. The Preset inputs need to be either high or low, not floating.

If this example is good for you, I have most TTL and CMOS chips done up this way. I used to teach this stuff.

[MOD edited to place image into post]

Last edited by a moderator:

Replies
1
Views
195
Replies
2
Views
480
Replies
2
Views
1K
Replies
6
Views
2K
Replies
6
Views
3K