Patch for Model Car Version 2 (stabilize power supply)
It is necessary to change a few wires in the model car (Version 2, released on March 30, 2017). The current flowing through some of them is high (around 4 Amperes, and/or power peaks for the servo motor can also arise). Some wires used in the model car are too thin and have high resistance. The voltage from the regulator to the Odroid can drop from 5.2 V to 4.6 V, which turns the camera , or other devices, off.
So let's change the wires. Please be careful, we are changing the power cables and a wrong connection may burn the devices on the car. It takes around 3 hours, so be patient and do not do it in a hurry.
First buy 0,5 mm wires. I tested with the wire from the link below. You can find the same type of wire in your country.
https://www.conrad.de/de/mikrofonkabel-7-x-050-mm-schwarz-lappkabel-49900200-meterware-608510.html
The thinner wires may have high resistance. The ticker ones have to be soldered and connected well according to the next sections.
Solder 0.5mm wires to the output pins. First identify which pin is +5 and which pin is GND. As you can see in the picture below, the pink wire is connected to +5V and the gray wire is connected to GND.
Make two long wires going from the regulator (near the Odroid) to the BLDC-control board, one for 5V and one for GND (0 volt). In the picture we see the long pink wire going from the regulator to the BLDC-control board (they will be attached later). The same is done for GND with the grey wire.
Cut the two Odroid power connector wires (black and red, inside the frame in the picture below). These wires should be as short as possible, because they have high resistance. In the picture below the two wires have been already cut and have been attached to the other wires. In total we solder together four power wires (two from the regulators, one from the long wire to BLDC and one for the Odroid). We also solder together four GND wires (same origin).
The white wire is for motor power which is above 12 volt and comes from the push button. Cut it near the push button, and solder a new 0,5 mm wire which is going to be connected to the BLDC board.
Connect the 0.5mm white wire to the third pin of the BLDC-control board. Now all wires going to the BLDC board are 0.5mm wires.
Check carefully all new connections. Now you can test the car and see how it works. The diagram below shows the power configuration with the new wires and wiring.
