Minder is a work in progress and I will be developing ideas further throughout the upcoming months and throughout the 2018 Hackaday contest. However if you would like to create your own watch (up to its current version) then feel free to follow these instructions!
23D Print Case
The first step is to download and Print the 3D printed watch case. Download the STL file from the 'files' section and print! The case is very small (only 40mm by 40mm) so most printers will be able to print it.
- Supports (everywhere)
- 20% infill is fine
- PLA or ABS plastic is fine ( I used PLA)
- other settings will vary depending on your printer.
Remove the support material once printed and you are done!
If you do not have access to a 3D printer then try out 3D hubs (https://www.3dhubs.com/).
- First, collect all the necessary components (as seen in components list)
- Now as for soldering the components together you can either do it out of the case or in the case. I soldered all the components out of the case using very thin enameled copper wire and then slotted the circuit in the watch through the holes on the side of the case. Alternatively you can solder the components together once all electronics are fitted inside the case (this poses the risk of burning the 3D printed case).
- Create the following circuit:
- The RGB LEDS come pre-soldered to the Qduino board, carefully use a soldering iron to de-solder the LEDS from the board and small pliers to pull them off. (alternatively you could buy small RGB LEDS incase you damage the ones already on the board)
- The 'Freetronics OLED screen' did not have a model on Fritzing and only has 10 pins (not 14).
- This is only Version 1 of the Minder smart watch circuit.
Stack the electronics into the watch case like this:
**note: The heart rate sensor is located at the bottom (not shown in animation)**
There are many solder joins that must be made and it will be very hard to fit everything in the case, patience and persistence is the only way through this! (however in the future I plan on making a custom PCB board that can be easily printed and will fit nicely into the case, so fear not!).
I also waterproofed the electronics by using liquid electrical tape to cover important joints.
4Attach wrist band
Once the electronics have been installed you can now attach the wrist band to the watch case. The 3D printed case has small holes that allow the watch band pins to easily slot in.
Download the code from the files section, insert the micro usb programming cable and upload!
note: There are 2 different codes in the file section. Due to the small storage space on the qduino I was not able to have both the watch menu and settings and all the anxiety techniques in one code. So if you would like all the anxiety techniques download the 'Minder code all techniques' file. If you would only like the breathing technique with the menu and settings then download 'Minder code breathing only.'
I am planning on upgrading the micro-controller in the future to have even more space and power, I am also in the process of fixing the code and making it more optimised so please stay tuned for an even more powerful version of the minder watch! (this is still a work in progress).