Basketball
From Mech
Team Members
- John Rula (Mechanical Engineering, Class of 2009)
- Alex Wojcicki (Mechanical Engineering, Class of 2009)
- Meredith Chow (Electrical Engineering, Class of 2010)
Introduction
A throwing arm propelled by a Pittman motor is mounted on a turntable and throws the ball into the "hoop." The hoop is wrapped in reflective tape and an IR emitter, receiver pair is used to sense where the IR is reflected most (the hoop with highly reflective tape). An ultrasonic sensor then pings the hoop for the distance of the hoop. With this information, the arm is able to "make a basket."
Mechanical Design
Components
| Part | Part No. | Qty | Vendor | Price (Total) |
|---|---|---|---|---|
| Pittman Motor | GM8712 | 1 | Lab | - |
| RC Servo Motor - Futaba | S3004 | 1 | Lab | - |
| Acrylic .25" Thick, 12"X 12" | 8560K354 | 1 | McMaster | $12.54 |
| Acrylic .25" Thick, 24"X 24" | 8560K357 | 1 | McMaster | $39.63 |
| Corrosion-Resistant Turntable | 6031K17 | 1 | McMaster | $2.42 |
| Fasteners | - | ~20 | Shop supply | - |
Drawings
Electrical Design
Components
| Part | Part No. | Qty | Vendor | Price (Total) |
|---|---|---|---|---|
| PICs | PIC18F4620 | 3 | Lab | - |
| Encoder | LS7083 | 1 | Lab | - |
| H-Bridge | L298N | 1 | Lab | - |
| Ping Ultrasonic Sensor | 28015 | 1 | Lab 5 supply | - |
| IR Emitter | QED123 | 1 | Lab | - |
| IR Phototransistor | LTR-4206E | 1 | Lab | - |
| Diodes | 1N4148 | 4 | Lab | - |
| Resistors | 47.5/150K | 2 | Lab | - |
Circuit Diagram
Code
Results
In the end, the project ultimately succeeded -- baskets could be made. However, better tuning for the motor control and needs to be developed for more consistent results.
