This project provides a fun engineering challenge: use common materials to build a "launcher" to throw the ball and a "receiver" to catch it. Figure 1 shows some example devices. Two catapults are made from pencils, plastic cups, tape and a ruler and are pictured on the left of the image.There will be more difficult problems and even more frustrating prototypes. Team Ping-Pong Ball Launcher (PPBL) understands that while we may not have a functioning apparatus, we have gained more valuable knowledge of our arduino operations and overall mechanics. We took an idea, made it a design, prototyped, redesigned, and prototyped once more. about the strength of the firing mechanism. MEMS 411: Senior Design Project. Automatic Ball Launching Entity (ABLE) Zachary White ... The PetSafe Automatic Ball Launcher has multiple distance and angle settings which allows for tennis sized balls to be fired between eight to thirty feet, at various angles. ...