During the testing phase the arm on the machine broke because there was too much tension for the strength of the wood. I am going to replace the wooden arm with either metal, for more strength, or plastic, for more pliability. Copper would be preferable because I can then attach the ball holder at the end with solder to ensure a strong hold.
From here I look to design the triggering mechanism. I have some ideas for a wireless control which would be preferable. I have been thinking about using the wireless doorbell or a remote control car to turn a small motor which could then release a latch. There are several factors we must think about when trying to do this type of triggering
1. Power of motor to release latch
2. Friction on latch and arm must be light enough to be moved.
3. A re-latching function for quick reset.
I am sure I'm not thinking of all the problems to be solved but these are some important ones.