There are several RTC samples. Some need a external chip, some don't. 16f876a_rtc_lcd.jal 16f876a_rtc_timeset.jal 16f877a_rtc_lcd.jal 16f877a_rtc_pcf8563.jal 16f877a_rtc_timeset.jal 16f886_rtc_lcd_125khz.jal 16f886_rtc_lcd_20mhz.jal 16f886_rtc_lcd_4mhz.jal 18f2620_rtc_tmr3.jal 18f26j11_rtcc_hw_kbd_lcd.jal 18f27j53_rtcc_hw_alarm.jal 18f4620_rtc_mcp7940.jal
I suggest either a PIC with an external rtc chip, or a PIC with a RTC built in. I suggest this because a tiny battery can keep your clock running when the power goes out. I'd get a good crystal, like one of these square ones at the correct frequency: http://img.directindustry.com/images_di/photo-mg/voltage-controlled-crystal-oscillators-vcxos-34575-3042811.jpg Of course, I am not a clock expert like others here :) -- You received this message because you are subscribed to the Google Groups "jallib" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at http://groups.google.com/group/jallib. For more options, visit https://groups.google.com/d/optout.
