Real Time Clock & Eeprom

[smart_storm]

MR. sayzer

i don't know how i can thank u for great explanation
both in first and second posts

so i said using equations solve all the problems
but it's very difficult not only in PIC but also using PC

so let's stay at the table solution


for now i hope MELANIE understand the problem

as for MR.sayzer when i said 1 min this is because this ensure

that two times will identical at some time

because the change is in minutes

so i hope that some one can help

excuse me but if there is no problem please don't use the RTC DS1302

or any other RTC because in our country we can't find those real time clocks

so i Prefer the programming solution for the clock

another thing you are talking with PICBASIC beginer

this is as for me

i hope mr.sayzer still with us to help

thanks for this special forum

[sayzer]

smart_storm,

Pls provide more details.

How/from where do you want to get the time? If you do not want to use RTC, will you receive the time from a PC or from somewhere else?

Since the minutes are very important for prayer times, if you use classic programming to make a clock generator, it will not be as precise as an RTC, and the timer will either run faster or slower. Eventually you will end up with at least 1-hour faster running timer in one day.

I understand your difficulty of finding RTC chips, but I suggest that you try your best to find an RTC chip somehow. That would be the best solution for a precise time matching.

[paul borgmeier]

smart_storm,

I posted some amazingly short and simple code in the “Examples Section” that will keep accurate time without the use of an RTC (within 2 seconds per day – same as with RTC). The code could easily be modified to keep track of days and you could easily add your lookup table.

See

http://www.picbasic.co.uk/forum/showthread.php?t=2129


Good Luck

Paul Borgmeier
Salt Lake City, Utah
USA

[smart_storm]

thank u MR.Paul Borgmeier for your help
i'll see your post

as for MR.sayzer can Paul Borgmeier program help me or not

if it's neccesary use RTC i will try but i don't sure i can

any way can we modified the code to do what we need

also if there is no RTC i don't care if we lose 2sec/day "this is only for me as starting point"

right now i don't see the code

i hope MR.sayzer see it and said to me your opinion

again thanks for all to care of my ques

sorry for my bad english