A few things might inhibit an Arduino ... on a common breadboard. Even if you don’t mind using a development board, you may want to use the IC directly in a final version of a project and ...

This is quite an old project, and we’ve actually seen a successor to it. This is Rev. 2 and we looked in on Rev. 7 back in March. That one is a full Arduino, but the circuit board has no substrate.

A simplified version simply needs a speaker, breadboard ... read messages directly from your Arduino watch from an OLED display. This is a really cool project that requires a bit more technical ...

Compatible with Arduino and Raspberry Pi, it can almost meet all your needs. (Without Microcontroller Board) Breadboard and Power ... dupont wire to meet your project expetation.