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 to diodes Diodes are electronic components that allow current to flow in one direction but not the other. Most common diodes have two leads. Some are clear with reddish-orange on the inside and a black stripe on one end while others are black with a silver stripe on one end. The stripe indicates which … 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
Introduction to operational amplifiers An operational amplifier also referred to as an op-amp is a high gain Dc voltage amplifier, meaning it can use a very small voltage difference between its input to control a much larger voltage at its output usually 100 thousands of times larger. operational amplifiers come in different package types and … Read more
Introduction to burglar laser alarm system Insecurity is a common problem around the world. Properties are lost to burglars that invade people’s houses and silently cart away valuable things from their victims. Anti-burglar systems have been created over the years to prevent such occurrences but burglars always develop techniques to still get into the house … Read more
Introduction to water level Alarm system Most households with overhead tanks tend to have a problem with overrunning water while pumping water into the tanks. This is a result of not knowing the quantity of water present in the tank and the whole process has to be followed manually. The person charged with the duty … Read more
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
