The circuit operates from a 3.3-V supply. When using the Zeevo chip, developing a Bluetooth-enabled product is really more of a software project than a hardware project.

This project presents a Morse code generator system built using Arduino Nano, Bluetooth module (HC 05), and various integrated circuits (ICs) including 74147, 7404, 74154, 74LS30A, and 7447. The ...