Hi, My teacher has given me a project and using a 555 timer, and BCD counters 7490. My project criteria is :
1) make the timer a monostable of 1 minute.
2) make the counters into two divide - by 10 counters.
i have done all these and now she wants me to connect the timer to the counter to show a count of 100 within one minute. and at the end of it, an led must light up.
steps are:-
1) press trigger button to 555, timer on for 1 min. Counter starts to count. When count reaches 100, LED lights up.Counter stops counting.
2)To start new count, press trigger button again.
Can anybody help me on how the connection or do you have a simple circuit design that i can have cause i really dun know much about these and the worse part is i have to present it this friday... I know some gates must be used, like AND and OR.
hope to hear from helpers soon....
thanks