Step 1: Functions
First, The not so smart Xadow smart watch is a "Watch"~ I use a RTC module so this won't lose time if it's out of power (Forget the time on the picture, only for testing)
There is a beautiful animation when the seconds plus+ ^_^
- You can set up the current time~
- Enter "stop watch" mode and start timer!
- Sleep mode help to save battery power
- Calendar mode
- Flash light
Step 2: Materials & Tools
- Xadow main board
- Xadow RTC
- Xadow breakout
There is no button module on Xadow, so you have to use Xadow breakout and Perfboard, together add three more button presenting left, confirm and right.
Step 3: Software
I publlihthe code at https://github.com/xhbang/Xadow-digital-watch
under GPL license, it's totally free and open!
If you are familiar with Arduino, you can make a watch now! Please mod a better looking beyond my design!
Please download and report bugs to me .THX Zak for his initial work!
Step 4: Handwork
A deeper understanding of Xadow Watch:
A wired jumper you should pay attention to. There are two times within RTC module, but only one of them will be shown on the back of board: INTB. The main logic is: RTC and button will sent INT to MCU, and OLED changes according to the interruption. So connect the INT to the RX on Xadow compatible interface.
To make it simple and wear more comfortable, I cut off a short segment of cowhide.
Just use a little clip, it's on your hand now!
Step 5: Later plans
In this picture, I add a ultrasonic module to use it as a add-on for this watch~
raise your hand, point to the girl you like. You got the distance between you and her!
OK, this is only an imagination, if you guys think it's a cool idea, I will make a real smart watch including BLE module, adding ID to make it cool & fun & geek.