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Arduino driven Tennis Ball Machine, My first Arduino Project.

This is my First Arduino project , I decided to build a Tennis Ball launching machine for use in my garden. It has 5 motors. the ball is fired by two motors rotating at 6000 rpm, The direction and elevation are controlled by 4 arrays of 29 values, therefore you can program the position and height that you want the ball fired, the four arrays are selected by a pot, so that you can select difficulty that you have pre-programmed into each array. The speed of the wheels that launch the ball are also controlled by pots, both wheels are controlled from 50% upto 100% speed, the lower wheel is controlled from another pot to reduce its speed from anywhere between 50% and 100% but not faster than the top Wheel, this allows a top spin to be added if required, the video shows the ball being launched at 70% power. The ball feed rate can be set at anything between 1 sec and 60 seconds. All parts are commonly available, I still need to add sides and paint but will be ready for Spring 2020