2.0 Less soldering
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You don't want to solder quite so much? You don't care if there are so many cables standing around?
Then you can do it completely different! Instead of the board you get a so called sensor shield for the nano and a bunch of jumper wires. (You have to specify which kind you want!) A few soldering points still remain: Pins have to be soldered to the motor driver, to the step up converter, to the LiPo charger and to the reflex coupler as well.
Oh yes, you also have to solder the connections to the motors and the on/off switch. That makes a total of 39 soldering points instead of 116 with the PCB.
The whole thing is screwed to a plywood plate. The whole thing is finished.
The wiring: Basically the pins of the NANO are marked, which are connected to the sensors or actuators, in the order they are shown.
Example: The right ultrasonic sensor (US). The pin VCC on the US is connected to +5V, the pin Trig of the US is connected to pin 4 of the Nano, Echo -> 2 etc.
On the motor driver the pins protrude on the ununlabeled side!(Video from 6:34, but just solder pins from the CORRECT side! Cables are not needed! Will be plugged on later!)
The positive pole of the LiPo is connected to the LiPo Charger via the switch, the negative pole of the LiPo should be disconnected when you are not working with the robot. Otherwise it will discharge...
If you are not sure, have a look at the layout of the board. There you can follow the traces.