hi besoy,
Look at the 120 second circuit I have just added to my Forum Blog. [right hand image]
You will require a 74LS08 and a 74LS04 ic.
This should meet the project requirement.
Let me know how you get on.
sir gibs did you try this connection? this diagram can make now 2minutes count up counter and buzz after 2 minutes for 5 sec.?
because so far i didnt try this connection, i dont know what is the output of this..
thanks a lot sir gibs.. Gob bless!