AM Radio using 555 timer IC
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555 TIMER
Introduction: It is a IC chip used in vareity of timer,pulse generation and oscillator application. It is one of the cheapest and most rugged chip in the market. It is used to provide accurate and highly stable time delays or an oscillation. It is in widespread use due it's ease of use,low price and stability. It was estimated that 1 billion units are manufactured every year. Depending upon the manufacture the standard 555 package include 25 transistors,2 diodes and 15 resistors on a silicon chip installed in 8-pin mini dual-in-line package(DIP-8). The circuitary inside the chip takes about 10MA even if the o/p is not driving the load i.e it is not suitable for battery operation if the chip is to be powered all the time. This timer bascially operates in one of the two modes either as an Monostable(one shot)or an astable. The chip producing output frequency 1 cycle per second i.e 1HZ is called Oscillator.but below 1HZ is called Timer. The specification of 555 timer is...
Solar Panel
Solar cell (also called a photovoltaic cell) is an electrical device that converts the energy of light directly into electricity by the photovoltaic effect. It is a form of photoelectric cell (in that its electrical characteristics—e.g. current, voltage, or resistance—vary when light is incident upon it) which, when exposed to light, can generate and support an electric current without being attached to any external voltage source, but do require an external load for power consumption. Photovoltaic comes from the Greek meaning "light", and from "volt", the unit of electro-motive force, the volt, which in turn comes from the last name of the Italian physicist Alessandro Volta, inventor of the battery. A solar panel, or module, is a series of interconnected silicon cells joined together to form a circuit. In greater numbers the amount of power produced by these interconnected cells can be increased and used as an electricity production system.Solar pan...
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