Uno R3 Official Box Atmega16u2 / Uno+wifi R3 Original Atmega328p Chip Ch340g For Arduino Uno R3 Development Board Wemos Esp8266 - Integrated Circuits - AliExpress
UNO R3 Development Board ATMEGA328P Chip CH340G Box ATMEGA16U2 WiFi For Arduino | eBay
A tour of the Arduino UNO board
10PCS Original ATMEGA328P-PU Microcontroller IC Chip W/ Bootloader For Arduino – ASA College: Florida
NGW-1pc CANBed DUAL - RP2040 chip based Arduino CAN Bus dev board with 2 independent CAN Bus interfaces(CAN2.0 & CAN FD) Sensors & Transducers - Newegg.com