For EECS 473, our group's project is a wireless, electric-powered, friction-braking system for longboards. We call this product the E-Brake. Developed by Austin, Iman, Wendy, Nathan, and Guthrie. Original idea was created by Nathan.
This system is employed by the user to have direct control over reducing their speed to reduce the likelihood of a collision. In the case of an event where the user becomes separated from their board, the brake automatically applies to prevent the longboard from hitting someone or going into the road.
First clone the repository and get accustomed to developing in the STM32CubeIDE.
When setting up the IDE, make sure to enable printf for floats. To do this, click Project -> Properties -> C/C++ Build -> Settings -> MCU Settings. Then check the box that says "Use float with printf from newlib-nano (-u_printf_float).
The brake system bolts onto the back of the board.
The brake system deploys downward based on a screw and socket pushing up.
The user should be able to control braking using the controller through the use of a trigger. The trigger will correspond to the desired angle of the motor.
The controller communicated data regarding a request to calibrate the force sensor and requests for desired braking position based on the trigger position.
The MCU is STM32G031F8P6. The Bluetooth module is HC05. The display is LDD-SMHTA304RISITR. The shift registers are SN74HC595.
The braking system is able to detect if the user has lost control of the skateboard. A force sensor is used to detect the presence of the user. If the user is not detected for over a second, then the braking arm will automatically move to the braking position.
The MCU is STM32G031F8P6. The Bluetooth module is HC05. The motor driver is DRV8825. The force sensor is SEN-10245. The IMU is GY-511. The I2C Mux is TCA9548A.
Here are the images of the PCBs
- Austin
- Iman
- Wendy
- Nathan
- Guthrie