ds32khz ds1307
Hello!
OK, so the price is not really a problem.
I have never used ATMEL processors, and I am guessing here, but you want to
build a simple clock, or your processor will have other tasks?
In any case, you can make a RTC / calender by software on the processor
itself. On some processor, you can just plug a 32 K crystal and use it as
a clock reference, and there is a way to finetune the clock. For example,
I am using a TI chip (MSP430F5438) which allows to calibrate the crystal by
software. The software calibration resolution is +/- 2ppm (if I remember
correctly), so you could have a clock 10 times more accurate than a
regular crystal which would therefore drift less than 1 minute per year.
Probably you have some ways to tune the clock on ATMEL processors too.
Check the docs.
Dora.
sn_burki said:
yes I checked it with my stop watch many times and I detected 2 second delay per hour, it means around one minute delay perday. So every 3rd day I will have to calebrate the time which is awful for me.
I am making this clock for my home and still I want it extremely accurate. I want to apply some techniques on regular crystal to get maximum accuracy, because I have seen many clock made on regular crystal but very accurate.
regards