Arduino/Morse Code Circuit

Overview

Here's a block diagram of what this circuit will look like. The Arduino sends voltages through its output pins to control an I2C LCD screen (see , where it prints the letters that it has sent and its current words per minute (WPM) sending speed, and a piezoelectric speaker, which will generate the morse code output:

Eventually this will also include an input potentiometer, but for now we're building this to send at a fixed WPM speed.

• There will not be an input potentiometer.
• There will be an output to an I2C LCD display
• There will be an output to a piezo speaker.

The software:

• Start: need libraries, pin settings
• Setup: populate character array
• read speed potentiometer
• set CW speed
• randomly select character
• send character
• update scrolling LCD text