GadgetHQ
ATMEGA16U2+MEGA328P Chip For Arduino UNO R3 Development Boar
USD 26.99
DropKart
ATMEGA16U2+MEGA328P Chip For Arduino UNO R3 Development Boar
USD 25.64
[EOL] I2C Joystick Unit (MEGA328P)
USD 12.95
M5Stack Stepmotor Module w/ MEGA328P (DRV8825)
CAD 23.72
MK-SmartHouse
UNO R3 (CH34OG) MEGA328P Development Board for Arduino
USD 4.99
Sesni Mart
UNO R3 Official (CH340G) MEGA328P - USB/TYPE-C CABLE ATMEGA3
USD 9.00
SainSmart.com
[Discontinued] SainSmart UNO R3 + LCD1602 Keypad Shield Star
USD 26.99