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.

Step 1: Assumptions

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.

Step 2: PCB

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.

Step 3: Design

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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