Guest
hi
i build a bcd clock shown in the page
http://ourworld.compuserve.com/homepages/Bill_Bowden/clock.htm
and all the circuit works fine and i am using 5v dc source voltage.
and my question is how can i add a memory circuit to the clock
to remeber the time the clock stops after the power is on other time?
and how can i calculate the duration of the 5v battery in the circuit?
thank you in Advance
i build a bcd clock shown in the page
http://ourworld.compuserve.com/homepages/Bill_Bowden/clock.htm
and all the circuit works fine and i am using 5v dc source voltage.
and my question is how can i add a memory circuit to the clock
to remeber the time the clock stops after the power is on other time?
and how can i calculate the duration of the 5v battery in the circuit?
thank you in Advance