How I Designed a Boxing Machine V2

A few weeks ago, I made the best of my projects, a boxing machine. It was definitely not perfect and needed a few adjustments. The electronics were made on a prototype board and had no housing. The frame was made of steel profiles which were quite heavy. In addition, the OSB housing did not look so good and also added a few kilos. Another drawback was the boxing pear, not sticking rigidly to the tube. The mechanism that stops the bulb in a horizontal position is also to be improved. The method of measuring the force will remain the same, i.e. it will be based on a reed switch and two magnets. These are my assumptions, and now I will proceed to their implementation.

I will start with electronics, previously made on a prototype board. I need a microcontroller that will be responsible for the working of the whole thing, a sensor measuring the impact force, a display showing this force, an mp3 module playing funny sounds, an electromagnetic lock holding the pear in a horizontal position, a power supply and a STEP-DOWN converter to lower the voltage, and an LED strip. The lock requires a voltage of 12V, so I will power the device with a 12V power supply, and the converter will lower the voltage to 5V, which will be used by other components.

The next task is to connect all the elements together to create a layout diagram. For this, I will use the Eagle program. I create a new project and add all the components to it, combine them and group them together to improve the readability of the diagram. Then I move on to PCB design. The number of elements on it is small, so it will be a simple task. I organize the elements, create paths using the autorouter and define the shape of the PCB. I add mounting holes and export Gerber files, which I then upload to the PCBWay website and order my PCB, which after a short time is built and shipped to me.

In the meantime, let's move on to the boxing machine design. I transferred the old boxing pear to the new project and based on its dimensions, I created a frame made of v-slot aluminum profiles, which I will connect and stabilize using connectors and screws with nuts. I came to the conclusion that the OSB board is a good solution for the housing, I will only change its thickness and put a veneer on it. I hope that after folding the whole thing will be a compact structure. The pear can reposition 90 degrees thanks to the piece of profile and the hinge. The last element to design is the electronics housing. In the next article, I will show you the rest of this project, i.e. finalizing the device.

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