Make a smaller layout, PCB or other circuit, from an existing Arduino project.

For a mock-up demo, an existing breadboard Arduino Uno project needs to be shrunk and fitted inside the available space for the mechanical product, 120x32x34mm including the space for the batteries. Please see the enclosed pdf showing the Arduino project and the maximum available space in the first page. I want to do it as simple as possible. - The shrink-layout can be on a PCB or on a prototyping board, as long as the presented components or circuits are easily available locally or from sites like [login to view URL] and everything fits inside the required space. - The microcontroller can be changed to a Arduino Mini, or it can be a socket for the processor ATmega328P with additional components, or it can be some other solution allowing Arduino programming. Future program change/uploads will be needed, but it doesn’t need to be through a fixed USB contact. - The shrink-layout should have connections/pins for attaching wires going out to the two switches, the hall-sensor, the HC-06 module and the DC-motor (located outside the shrink-layout). The other parts are inside the “shrink-layout” which you design. Please see second page in the pdf. No new outside components will be added later on, so there is no need for two motor connections etc. as on the existing motor control. - The batteries can be connected differently but I would like to keep similar capacity. None of the parts in the circuit has been checked or calculated. Your good advice on this and others are appreciated. Your electrical knowledge is important for helping me to put together a working demo mock-up in a simple way. Please give some very short info on how you plan to do it.