Simple automatic security light system using LM7812

Automatic security light system

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

Simple rain detector alarm system

rain detector alarm system

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

How transistors work


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

Simple Fire alarm system using LM358

Fire alarm system

Introduction to fire alarm system One of the most devasting accidents is fire accidents. For home protection, it is important that a system is made available to be able to efficiently detect fire and notify the household of imminent danger. This simple fire alarm system was developed with exactly that in mind. It is very … Read more