PIC24 bedside table alarm clock

Another year, another clock, but for the first time for my alarm clocks [1][2][3] I am not using an MSP430 but a PIC24 instead. Standby current is with 5.5 µA only slightly higher than that of my MSP430 based ones. Time keeping is done using the RTCC peripheral, which I also used for the first time.

It can be seen in action in this YouTube video: https://youtu.be/I8K4sLvQby4
Friendly green digits 🙂
And of course it has a LiFePO4 battery on its back, being charged every few years using my new USB charger [4].
A photo transistor is also included to dim the display in the dark. Much nices to the eyes when checking what time it is in the middle of the night.
Here’s a picture from the front side:

This is great Markus, I’ve always wanted to make my own alarm clock. I’ve been giving this a go over the past few days but my clock doesn’t dim in the dark. Maybe my photo transistor is broken. Where did you get yours?

Markus Gritsch wrote:Another year, another clock, but for the first time for my alarm clocks [1][2][3] I am not using an MSP430 but a PIC24 instead. Standby current is with 5.5 µA only slightly higher than that of my MSP430 based ones. Time keeping is done using the RTCC peripheral, which I also used for the first time.
It can be seen in action in this YouTube video:
Friendly green digits 🙂