Alarm Clock code and scematic

[Charlie]

Nice work!

Although a bit old the MCU. You can replace it with newer, cheaper and with no need of external xtal for the system clock. Reduces component list.

Ioannis

I suspect a crystal would still be required in order to have good time keeping accuracy.

[rocket_troy]

I suspect a crystal would still be required in order to have good time keeping accuracy.

I also suspect that too. Even the PICs with RTCC functionality (eg. PIC18F47J53 family) IIRC require an external 32.768 kHz clock for accurate time keeping.

Anyway, nice stuff Willie. I reckon I might call upon that code sooner or later.

Troy

[surfies]

Hi Troy, it really works, Ive also made another one for my deaf son , with flashing lights instead of the speaker system as an alarm