Battery and/or outlet-powered tennis ball launcher that larger dogs can drop balls into though a top funnel system. The speed of the motor is adjustable to allow the use of this device within indoor or outdoor settings. 3 different angle settings for the ball launch are included. Durable wooden structure yet competetive with the budget competition (ex. Amazon) which uses plastic. I am in the process of donating my device to a local shelter in my county.
2x4 1/2-inch plywood (x2, ~$30)
10000 RPM 12V Motor (x1, $20)
Pololu 100mm Diameter Scooter Wheel (x1, $8)
Pololu Scooter Wheel to 5mm input shaft (x1, $5)
7A Switch (x1, $13)
Standard-Size Alligator Clips (10-pack, ~$5)
1/4-20 2-1/2" long threaded bolts (x2, ~$2)
1/4-20 nuts (x2, ~$1)
Optional: 12V Battery
Drill
Drill bits (specifically...)
Jigsaw
Tablesaw (recommended)
Chopsaw (recommended)
regular wood saw (may be useful)
1-1/2in wood screws (x30, preferably countersunk)
1 in Phillips head wood screws (x6)
1/2 in Phillips head wood screws (x4)
Within design, there are three main adjectives: Fast, Cheap, or Good. You can only have two. Because I wanted a product that was good within a tight budget, I had to sacrifice Fast, and in turn, the project's timeline was much longer than I first imagined. This is derived from two facts: my lack of tools at home and the prototype process (link). I had to commonly bring my pieces to school and schedule days where I could fabricate the parts I needed, which significantly hindered my process. I fully believe that my timeline would be cut in half if I were in an environment much closer and accessible to a machine shop, such as a college setting. Overall, the prototypes were necessary in allowing me to understand the design boundaries and made designing the final design at a much faster pace.