What is Economics

May 15th, 2015
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Economics is the study of the production, distribution, and consumption of goods and services — the economy. Economists attempt to understand the economy and the way it responds to various influences, such as changes in federal interest rates.

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Automatic Street Light ControlAUTOMATIC STREET LIGHT CONTROL Components Required : * 9V Battery - 1 * 50K ohm Resister - 1 * 470 ohm Resister - 1 * IC555 - 1 * LED (any color) - 5 * LDR (Light dependent Resistor) - 1 * Switch (optional) - 1 * Connecting wires (Required)Know about Components :* IC555 : It is a timer IC used to give some delay to the circuit. It is most commonly used ICfor timercircuits.* LDR : It increases / decreases resistivity according to the light falling on it.Description : Connect the Components as shown in the circuit. The circuit is simple, so sure you will be getting the output. In this circuit, according to the light falling on LDR, the LEDs will GLOW or OFF. If light falls on LDR, the LEDs connected in series will be OFF.

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