Smartwatch system inspired by the Pebble Time.
MaxWatch is a smartwatch system built from scratch in 2019. The final version of the project is the working prototype of the smartwatch.
| MCU | Powerful & ultra-efficient 64MHz 32-bit ARM® Cortex™ M4F CPU |
| RAM | 256 kB |
| ROM | 1 MB (flash on SoC) + 16 MB (dedicated flash) |
| Communications | Bluetooth 5.3 (with Thread and Zigbee support), USB 2.0, NFC-A |
| Controls | 4 buttons |
| Screen | 1.3 inch IPS display (240x240, 261 PPI) |
| Battery | 200 mAH LIPO |
| Other | Microphone, vibration, accelerometer & gyroscope |
MaxWatch system consists of many components, and the main ones are presented in the following diagram:
Here you can find all the main smartwatch components in the diagram below:
- MCU. Rigado BMD-340 (SoM powered by Nordic nRF52840).
- Flash Memory. Rigado Winbond Electronics W25Q128JVPIQ (128 IC FLASH 128MBIT).
- IMU. Bosch BMI160 (IMU combining accelerometer and gyroscope).
- Microphone. InvenSense ICS-43432 (digital output bottom port microphone).
- LCD. ZJY130-IPS screen module (powered by ST7789 controller).
- Battery Monitor. STMicroelectronics STC3105IQT (Battery Management Battery Monitor IC).
Of course, these components should communicate with each other, right? So, you can find the low-level schematics of the smartwatch system below.
The first image of the schema describes connections between such components as MCU, Flash, and buttons:
The second image of the schema describes power supply management as well as connections between such components as LCD, IMU, Microphone, and vibration motor.
The full schematics can be found here.
