Hi guys! Can any one help me how to make a countdown clock timer (MM:SS) ..
We have a project that has to create a countdown timer with buzzer, but I don't have enough knowledge about doing such things that's why I'm seeking for your help...
The timer can be set for xx min. For example 90 mins and press start. It has to count down from 90 to 0 and trigger an alarm after 90 mins for 1 minute.
Requirements:
4 seven-segment (2 for Minutes and 2 for Seconds), and a button to set the time
Stop, Reset Buttons,
an LED will turn on when the count reaches 0:00
Using any 74xx family chips IC and other ICs.. I need schematic for this!...
Thanks in advanced!
We have a project that has to create a countdown timer with buzzer, but I don't have enough knowledge about doing such things that's why I'm seeking for your help...
The timer can be set for xx min. For example 90 mins and press start. It has to count down from 90 to 0 and trigger an alarm after 90 mins for 1 minute.
Requirements:
4 seven-segment (2 for Minutes and 2 for Seconds), and a button to set the time
Stop, Reset Buttons,
an LED will turn on when the count reaches 0:00
Using any 74xx family chips IC and other ICs.. I need schematic for this!...
Thanks in advanced!