Hi All,
I am looking at making a countdown timer that is set at 3 months to 0 to remind me to change my filter media.
I did think about using a 555 timer, but over this time period it might prove to be inaccurate.
The project will be powered by 2 aa or a 9v battery with 2 leds, 1 red and 1 green, the green led will stay on for 3 months, then go off and swop to the red led to indicate its time.
Ive been searching on google, but its now showing much up, can anyone on here please point me in the right direction.
Many thanks to all who replys.
I am looking at making a countdown timer that is set at 3 months to 0 to remind me to change my filter media.
I did think about using a 555 timer, but over this time period it might prove to be inaccurate.
The project will be powered by 2 aa or a 9v battery with 2 leds, 1 red and 1 green, the green led will stay on for 3 months, then go off and swop to the red led to indicate its time.
Ive been searching on google, but its now showing much up, can anyone on here please point me in the right direction.
Many thanks to all who replys.