The time has come for me to combine all the knowledge I’ve gained through my watch prototypes and create the ultimate watch. The Walltech Smart watch. I’ve started on the design, and the PCB is almost complete, and it’s set to be finished by the end of the summer.
The latest from Femtoduino, the FemtoduinoBLE uses an atmega32u4 from Atmel bootloaded as an Arduino Leonardo and a BlueGiga bluetooth 4.0 low energy module to connect to compliant devices and receive notifications for the watch. It’s tiny size and low power consumption make it perfect for use in this new watch.
- 1.5″ full color OLED display with onboard microSD card slot from Mike Rankin
A step up from the monochrome .96″ OLED display of v4.2, this screen also consumes very little power thanks to the OLED technology behind it and can show beautiful images that will be the GUI for the smart watch. Now that there’s an sd card on board, I can use fancy graphics and make it look professional and keep the code to the microcontroller, enabling more to be coded instead of storing images too.
- 3D Pedometer Module from Nicerf
This tiny, tiny module will connect to the watch’s I2C lines as the DS1307 does, and counts steps using a tiny accelerometer and buffer memory. It’ll be used to add fitness tracking capability to the watch and in conjunction with the phone app, keep track of calories burned and activity levels! Oh, and did I say this thing was tiny?
- Other components
The DS1307 and it’s regulator will make an appearance again, and the same battery charging IC from the previous model will charge the now 500mah lithium ion battery. To make selections, there will be a surface mount 3 way navigation switch in the top right that you can flick up, down, and push in to make selections and scroll through faces and apps.
This is the current (updated) state of the PCB. I’m currently waiting for a dimensional drawing of the FemtoduinoBLE, and when that comes, I’ll incorporate it and have it completed.