need to build a 12 clock

i'm using to build a digital clock and i need help building it... can anyone help me figure this out... :?: :?: :?: :? :?
(4) 7447 BCD to 7-Segment Decoder/Driver
(4) 7490 4-bit BCD ripple counter 32/16MHz
(4) 331g Ohm resistors
(4) 4 Segment Displays

and could you display a picture or some infomation so i could get this done.. within a reasonable time..
thank you so much for your help

look at this page.
**broken link removed**

if you have the 1HZ clock than you can use the firs two 7490 as "second" and the next two as for "minute".

After you'll need one more counter to get tha HR's.

How you going to get it from 4 counter ??
or I gues you dont need the "seconds"

Good luck :arrow:
STEVE

:shock:

*sniff* *sniff* I smell a homework/lab problem that was recently assigned.
https://www.electro-tech-online.com/threads/circuit-advice.14297/
https://www.electro-tech-online.com/threads/what-is-this.14397/

Check those two threads. Csaba, good call on the link. I never realized you could get a '90 to to count to 6 and reset without additional logic. When I did this project years ago, we used an opto-isolator to get a pulse from the wall-wart.

**broken link removed** Also works with 7493 up to 10 and for 12