Introduction to automatic security light system An automatic security light system turns on when it senses darkness without anybody having to switch it on. In most houses, we use a manual security light system which has to be turned on manually. The major drawback of this system is that when no one is around to … Read more
Introduction to the operational modes of a 555 timer A 555 timer is one of the most used integrated circuits for most electronic projects. In this chapter, we would discuss in detail all the operational modes of a 555 timer. It functions in different circuits as either a switch, a flip-flop, or an oscillator. A … Read more
Introduction to rain detector alarm system A rain detector alarm system is a simple device that alerts households when it senses rainfall. In areas where rainfalls are common or during rainy seasons, it’s important that we get informed about rainfall on time so we make necessary arrangements before the rain starts falling heavily. The device … Read more
Introduction of battery charge controller Since the innovation of secondary cells, the Recharging of batteries has been made possible by passing direct current through them. However, challenges have risen on how to know when the battery is fully charged and to cut off charging automatically if the battery is fully charged since overcharging damages battery … Read more
Introduction to transistors A transistor is an active electronic component that can be used for amplification or switching circuits. The basic type of transistor is the bipolar junction transistor. Bipolar junction transistors (BJT) Bipolar junction transistor is similar to diodes. Diodes have a PN junction while BJTs have two (2) PN junctions. BJTs are essentially … Read more
