First I made a testing chassis for the vibrating motors. As it is seen in the picture they are wired (connected with a thin copper cable) to a battery – this allowed me to make some experiments before deciding how to put them on the final version of the board. It turned out that they should be in angle. I decided to put them in 90 degrees.
So, I made another chassis with the 2 motors positioned in 90 degrees (2 x 40 degrees)
I used a double-sided prototyping board and the motors’ contacts fitted nicely into the holes, no soldering was necessary – I just fixed them to the board with isolated wires.
On the top of the chassis, I tied a shield-like board that connects motors to the MCU board. Later I may need to add some components on that shield board, like a driver for motors, sensors, etc.
The 2 vibrating motors, even though I bought them together, do not work the same way. That creates some difficulties controlling the direction of the bot – it turns well in one direction but not that well in the other. There are even bigger problems moving forward.
In the next version, I should definitely make changes in the vibrating motors – use some of those button-like ones and also change their angle. A friend of mine suggested that I should probably play more with the “legs” as they are crucial for the movements with which I agree.
The battery is too big, but the button cell battery is not enough to power the MCU and the motors for a long time, so I should probably think of another power source.
There is a short video on YouTube that shows more photos of how I built this with some footage at the end of the robot moving around.
Any comments and suggestions are really appreciated.
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