Alarm Clock Overkill
I don’t get up at the same time every day, so I thought it’d be nice to have an alarm clock that would drag me out of bed at different times on different days. That was the initial idea: things got out of hand, of course, and this is the result.
What it does:
1) It displays the time, day, and date. It also keeps track of the year, leap years, and adjusts automatically for daylight savings time.
2) It displays the temperature.
3) It has seven independent alarms, each of which can be set for different days of the week. For example, one alarm can go off at 5am on Tuesday, Wednesday, and Friday while another can go at 6am Monday and Thursday and a third can allow me to sleep until 7 on weekends.
4) In the event of power failure, the clock keeps time anyway. The alarms and display don’t work when the power’s off of course, but when power comes back on the time will be correct and it remembers the alarm settings.
5) It announces special events. Today is New Year’s Day, so the bottom line of the display alternates between day/date (shown above) and the message shown below.
Here’s a cut-down version of the code. I trimmed the getMessage() function in this sample code to just show an example of how the “special events” code works — you’ll have to put in the special events of your own choosing. (Or you can email me and I’ll send the uncut version.)
For more detail: Alarm Clock Overkill
EasyEDA: Ideas for Circuit Design, Innovation for Electronics Access
Free Circuit Design: Schematic – Simulation – PCB Layout – Gerber Viewer
Cheapest PCB Prototype: Only $2 for 10pcs 10×10cm PCBs, 24 hours Quick Turn, DHL Delivery in 3 Days