HELP!!!!...counter circuit

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dorai007

New Member

• Sep 11, 2004

• #1

hi guys..im raj..and i need serious help...hmm any1 knoes how to design a counter circuit..hm tat is connected to a 555 timer...plz people i need help..thanx

 

hotwaterwizard

Active Member

• Sep 12, 2004

• #2

I have one!

 

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-=GST=- Nemisis (cs/cz)

New Member

• Sep 14, 2004

• #3

what is the use of U1 in that?

 

Nigel Goodwin

Super Moderator

Most Helpful Member

• Sep 14, 2004

• #4

-=GST=- Nemisis (cs/cz) said:

what is the use of U1 in that?

Click to expand...

It's a 5 regulator, it regulates the 9V battery down to 5V as required by the TTL chips used. If you connected 9V directly to the TTL chips it would blow them.