Update connections diagram

andino_hardware/README.md

@@ -9,7 +9,7 @@ This package aims to provide the necessary information to the correct assembly o
 | 1 | SBC | Raspberry Pi 4 B (4 Gb) | [PiShop](https://www.pishop.us/product/raspberry-pi-4-model-b-2gb/), [TiendaTec](https://www.tiendatec.es/raspberry-pi/gama-raspberry-pi/1100-raspberry-pi-4-modelo-b-4gb-5056561800349.html) | If you want better performance you could buy the 8GB model |
 | 2 | Chassis |  2 x Print 3d Chassis + Rubber Tyre Wheels | [Chassis](./printing_model/chassis/), [Wheels Sparkfun](https://www.sparkfun.com/products/13259) | - |
 | 3 | Motors | 2 x Motor with Encoder | [Sparkfun](https://www.sparkfun.com/products/16413) | - |
-| 4 | Microcontroller | Arduino Nano | [Amazon](https://www.amazon.es/RUIZHI-Interfaz-Controlador-Mejorada-Compatible/dp/B0CNGKG4MZ/ref=sr_1_6?dib=eyJ2IjoiMSJ9.gnHfW9VtlEjMns12dAyHXLyFAlaikWpFyoOQJpO0iJBR-zelggQTQ9n001SH_P6NQ9DO3gPetP2krm7GAGvJus6vz4Utqu8Hy1gol0Rq7nmtJITd70ZNi3linf9v1g1iP7MlBx98cBGLVvFy-O2kZnJ63uZDwOZzwz_kExJzUWAxroO3AjufqqGOQHswLfDfjH6jpOJt54xxpCaqurDccId2O0uGKOj6WpPz6iLSubpsPB479SWYPSncxWQzz2kO4VjT6HVzPS2uWi19TS-A9WXVZceLBiz9t25Pf39jiGQ.1sLxrQ94HdIoXBq4VcDFMZhzKoL3wyJoY-U6BmDI6fY&dib_tag=se&keywords=arduino+nano+v3&qid=1714468231&sr=8-6) | You can also use an Arduino Uno, but mind size |
+| 4 | Microcontroller | Arduino Nano | [Amazon](https://www.amazon.es/RUIZHI-Interfaz-Controlador-Mejorada-Compatible/dp/B0CNGKG4MZ/ref=sr_1_6?dib=eyJ2IjoiMSJ9.gnHfW9VtlEjMns12dAyHXLyFAlaikWpFyoOQJpO0iJBR-zelggQTQ9n001SH_P6NQ9DO3gPetP2krm7GAGvJus6vz4Utqu8Hy1gol0Rq7nmtJITd70ZNi3linf9v1g1iP7MlBx98cBGLVvFy-O2kZnJ63uZDwOZzwz_kExJzUWAxroO3AjufqqGOQHswLfDfjH6jpOJt54xxpCaqurDccId2O0uGKOj6WpPz6iLSubpsPB479SWYPSncxWQzz2kO4VjT6HVzPS2uWi19TS-A9WXVZceLBiz9t25Pf39jiGQ.1sLxrQ94HdIoXBq4VcDFMZhzKoL3wyJoY-U6BmDI6fY&dib_tag=se&keywords=arduino+nano+v3&qid=1714468231&sr=8-6) | You can also use an Arduino Uno, but mind size. It should include a microUSB - USB cable. If not, you will need to purchase it.  |
 | 5 | Motor Driver | L298N Dual H Bridge | [Amazon](https://www.amazon.com/Bridge-Stepper-Driver-Module-Controller/dp/B09T6K9RFZ/ref=sr_1_4?crid=37YY7JO6C3WVE&keywords=l298&qid=1685740618&sprefix=l29%2Caps%2C277&sr=8-4) | - |
 | 6 | Laser Scanner | RPLidar A1M8 | [RobotShop](https://www.robotshop.com/products/rplidar-a1m8-360-degree-laser-scanner-development-kit?_pos=3&_sid=b0aefcea1&_ss=r), [Amazon](https://www.amazon.es/dp/B07VLFGT27?ref_=cm_sw_r_cso_wa_apan_dp_RJ3AZC2XCEVDK0X2DCGA&starsLeft=1&th=1) | - |
 | 7 | Camera | Raspi Camera Module V2, 8 MP | [Robotshop](https://www.robotshop.com/products/raspberry-pi-camera-module-v2), [Amazon](https://www.amazon.com/Raspberry-Pi-Camera-Module-Megapixel/dp/B01ER2SKFS?th=1)  | - |
@@ -29,6 +29,13 @@ Some frequent errors:
  - If one of the motors rotates in the opposite direction (think about the orientation of the motors in the chassis) probably the output(+ and -) of the L298N's output should be toggled.
  - When moving forward the encoder values should increase while moving backwards they should decrease. If it is happening the other way around probably the A and B encoder signals should be toggled.
 
+### Raspberry-Power
+
+<img src="docs/andino_diagram_raspberry.jpg" />
+
+*NOTE: depending on how good is the powerbank we have, the motors should be powered with more or less voltage. While a higher voltage value (up to 9V) leads to smoother operation (better motor speed control), it also increases their open-loop speed, which is noticeable particularly during motion start and varies according to the power bank quality (output current capabilities). Therefore, adjusting the output voltage to lower values (around 7V) may be required so as to make the motors work as expected.
+
+**NOTE: Ensure the ribbon cable is properly connected with the blue or silver side facing the USB ports.
 
 ## Microcontroller Configuration