Optiboot (an older version) is installed by default on the Arduino Uno and (as of 2018) official Arduino Nano boards. It can be installed on all older mega8, 168 or 328 based Arduinos. As of 2019, ...

The BK1088E is a single-chip solution for receiving AM, FM, and shortwave radio. Using inexpensive components (Arduino Pro Mini, some push buttons, and a standard OLED or TFT display), the hobbyists ...