ctduong1

I am trying to create a countdown timer for a friend of mine who is expecting a baby. The counter I have seen are very small. I'd like to create a counter with a big led that will display month, day, minute, sec countdown where I can set the time and reset it after it is done. Does anyone have a schematic for this? Your help will be greatly appreciated.

ctduong1

Just a clarification, when I say big, I mean something like a 1 inch 7 segment led or something.

Russlk

Sounds like a job for a computer because the months have different days. You could pick up a used computer and display real cheap and program it. The computer has a built-in clock, so it is only necessary to display it.

__________________
see my website: www.geocities.com/russlk

ctduong1

After doing some research, it is going to be tough to do it in months so I would like to do it with day, hour, minute.

Russlk

I wrote this program, in GWBASIC, just to show what can be done. It displays the date and time until the ending time. With a little more thought, I could subtract the dates to display the time remaining.

Attached Files

countdn.doc (21.5 KB, 59 views)

__________________
see my website: www.geocities.com/russlk

Nigel Goodwin

Months is no harder than the rest, as long as you do it with a micro-controller - just using hardware the entire project is quite expensive and complicated.

__________________
PIC programmer software, and PIC Tutorials at:
http://www.winpicprog.co.uk

gmphadte

All that u need can be done using this UP/DN counter IC.
U will have to do some interconnection and some preloading of the counter and the register.

U will have to use multiple of these ICs and use drivers for the big size displays.

Gajanan Phadte