Amazon.com: Voltage Level Translator, Icstation 4 Channel Voltage Level Converter Opto Isolator Board PNP NPN PLC Signal Converter Module 12V to 3.3 V : Electronics
RPi 3.3V to 5V 26 I/O Bidirectional Voltage-Level Shifter Module for Raspberry Pi
voltage - Interfacing 12V logic with 5V circuitry - Electrical Engineering Stack Exchange
4Bit Optocoupler Isolator 12V to 3.3V Level Voltage Converter Board PLC Signal - Pin Board - Arduino, Robotics, Raspberry Pi, ESP8266, Learning DIY, Development board ICStation
Mini Dc-dc 12-24v To 5v 3a Step Down Power Supply Module Voltage Buck Converter Adjustable 97.5% 1.8v 2.5v 3.3v 5v 9v 12v - Integrated Circuits - AliExpress