For voltage stability L78S05CV Positive-Voltage regulator is used, and for power supply you can use two Li-Ion 18650 batteries.

During programming please keep in mind next design rules:

- D0-D1 — reserved for Bluetooth module (TX have onboard resistor voltage divider for HC-06 module)

- D2-D7 — reserved for H-bridge module (aka. L298N Dual H Bridge)

- D8 — reserved for servo motor

- D9-11 — reserved for RGB LED with onboard resistors

- D12-D13 — reserved for ultrasonic sensor HC-SR04

- A4-A5 — reserved for I2C communication with onboard pull-up resistors

Notice — Bluetooth module has to be disconnected during uploading a program to the Arduino Nano.

Petar Jurkovic made video with his Robot Nano Shield application:

https://www.youtube.com/channel/UCNKiWS7wVRd6gKhKtQ9N1iw