Code practice unit II
The ability to send and receive Morse code is a very useful skill. It's widely used in radio communications, and being able to send and receive Morse code is one of the requirements for a "ham" radio license. Here's a neat project that lets you practice Morse code. This circuit is a basic oscillator circuit that you've used in other projects.
When you press S1 and turn power ON, you'll hear a sound from the speaker. You can adjust the tone with the control volume. If you're interested in getting a "ham" radio license, find books about "ham" radio in your school or public library (they might be listed under "amateur radio").