Voltage divider for UART communication between rPi and Arduino UNO

[ersve]

Description
To enable communication between the Raspberry pi and Arduino UNO a voltage divider must be constructed so that the voltage level of the raspberry pi matches the voltage level of the Arduino UNO.
Requirements

• The voltage level of 5V generated by the arduino on the TX the shall be reduced to 3.3V on the RX of the Raspberry pi.
• The voltage level of 3.3V shall be increased/controlled such that it is registered as high by the ATmega328.

Tip:
-Consider using: level shifter (LCX245)
-great tutorial to follow: https://radiostud.io/understanding-raspberrypi-uart-communication/