RollingBall is a 10cm ball which will tonggle led status between lighting on & off when collides with other objects.
Any difference of acceleration in 50ms larger than 15 times scaler will account for a blink event. Then all leds will tonggle lighting status.
Things get more interesting when the number of balls increases.
| Pin | Function |
|---|---|
| PA8 | LED array 1 |
| PA11 | LED array 2 |
| PA12 | LED array 3 |
| PA15 | LED array 4 |
| PC13 | Debug LED |
| PB8 | SCL(Software Simulated) |
| PB9 | SDA(Software Simulated) |
| PB5 | EXTI9_5(MPU6050_INT) |
| PA9 | USART1_TX |
| PA10 | USART1_RX |
| PA13 | SWDIO |
| PA14 | SWCLK |
These basic modules are demanded.
- 1 * Gashapon Shell(White)
- 2 * Li-polymer Battery
- 1 * RollingBall Mainboard
On each side, there includes:
- 8 * 0805 led
- 2 * 5mm led
stm32f103c8t6 is the main controller.
A inertial measurement unit(imu) mpu6050 will update ball's motion status(i.e. 3 axis of acceleration values).
For charging purpose, the tp4054 is selected.