Chapter 6: Morse Code SOS Visual Alarm with a Bright LED
This chapter describes how to build a very noticeable visual alarm with a super-bright LED connected to a microcontroller board. The LED will show an SOS message (this is used when someone or a group of people is in danger or in distress). In this chapter, you will learn how to control a super-bright LED with a microcontroller board. The reason we are using a super-bright LED in this chapter is to increase the visibility of the SOS message with it. This chapter will be beneficial for future electronic projects because you will learn how to control an LED with a transistor working as a switch. The application made in this chapter can be used by people in distress while they are hiking, ...
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