Boyan Mirov
Control a robot with two motors and two servos to pick up ping pong balls via bluetooth
Dependencies: mbed Servo 4DGL-uLCD-SE Motor
Homepage
Ping Pong Scorer¶
This project's purpose is to create the machinery and controls necessary to make a robot pick up and deposit ping pong balls as part of the Ping Pong Collection Game.
Project Members
This project was a product of the following members:
- Christina Lee
- Boyan Mirov
- Sai A. Narray
- Alex Rao
For ECE 4180 at Georgia Tech
Linked Project
This project was created in tandem with the Object Counter. While it is certainly viable on its own, it's primary purpose is only served when using both programs on separate MBEDs.
Demonstration¶
Here is a video of the robot interacting with the Object Counter
Installation¶
To create this, you'll need the following parts:
- LPC1768 MBED
- 2x Motor
- Servo
- Sub-Micro Servo
- Robot Construction Set
- 2x Power Adapters
- Dual H Bridge Inverter
- Bluetooth LE UART friend
Power Coupling
Because of the way servos and motors interact with the power received, connecting them both to the same circuit can cause undefined (and often unexpected) behavior. As such, it is recommended to ensure that they are always on separate systems. In other words, we recommend connecting the servos to a secondary power supply, different from the supply for the motors.
This guide follows this recommendation
Motors¶
| MBED | H Bridge | Left Motor | Right Motor |
|---|---|---|---|
| Gnd | Gnd | Gnd | Gnd |
| +5V | VMOT | ||
| +3.3V | VCC | ||
| +3.3V | STBY | ||
| p21 | PWMA | ||
| p15 | AIN1 | ||
| p19 | AIN2 | ||
| p22 | PWMB | ||
| p18 | BIN1 | ||
| p16 | BIN2 | ||
| A01 | + | ||
| A02 | - | ||
| B01 | + | ||
| B02 | - |
Servos¶
| MBED | Servo (Arm) | Servo (Handle) |
|---|---|---|
| Gnd | Gnd (black) | Gnd (black) |
| +5V | + (red) | + (red) |
| p23 | CTRL (yellow) | |
| p24 | CTRL (yellow) |
Bluetooth¶
| MBED | Bluetooth UART LE |
|---|---|
| Gnd | Gnd |
| +5V | +5V |
| Gnd | CTS |
| p27 | TXO |
| p28 | RXI |