how to connect the 7447 to 7493 with the useof 555 timer to make 0 to 31 count with the use 2seven segment?

Answer 1

If you want it to count from 0 to 31, you will need 5 bits, and the 7493 is a 4-bit counter. You will therefore need two 7493 chips and two 7447 display driver chips to go with the counters.

The counter and display driver circuitry would look like this, with the first 7493 set up as a 4-bit divide-by-16 counter, and the other 7493 set up with only the A input used, so it's just a divide-by-2 counter (for the high-order bit)

http://pg.photos.yahoo.com/ph/dpeter508/detail?.dir=c51a&.dnm=2202re2.jpg&.src=ph

For the 555 timer, you can use the 555 timer setup shown in the link below:
http://www.aaroncake.net/circuits/relaytim.htm

Incidentally, the 7447 is best used with a decade counter (it displays digits 0 through 9 best), so a 7490 chip would work better. See this site for a single-digit solution:
http://www.aaroncake.net/circuits/counter.htm

Answer 2

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