Automatic street Light Control using 555 IC with Relay TinkerCad

>> YOUR LINK HERE: ___ http://youtube.com/watch?v=UKCzD9is9qg

Automatic Streetlight control using IC 555 and relay. The street light will be OFF in day time and it will get ON at night automatically. • LDR • === • Light Dependent Resistor or Photoresistor, which is a passive electronic component, basically a resistor which has a resistance that varies depending of the light intensity. A photoresistor is made of a high resistance semiconductor that absorbs photons and based on the quantity and frequency of the absorbed photons the semiconductor material give bound electrons enough energy to jump into the conduction band. The resulting free electrons conduct electricity resulting in lowering resistance of the photoresistor. The number of electrons is dependent of the photons frequency. • How does the LDR (photoresistor) works • The resistance is very high in darkness, almost high as 1MΩ but when there is light that falls on the LDR, the resistance is falling down to a few KΩ (10-20kΩ @ 10 lux, 2-4kOmega; @ 100 lux) depending on the model. • IC555 • ===== • The IC 555 timer is a one type of chip used in different applications like an oscillator, pulse generation, timer. The designing of IC 555 timers can be done by using various electrical and electronic components like transistors, resistors, diodes and a flip flop. The operating range of this IC ranges from 4.5V -15V DC supply. The functional parts of the 555 timer IC include flip-flop, voltage divider and a comparator. The main function of this IC is to generate an accurate timing pulse. In the monostable mode, the delay of this IC is controlled by the external components like a resistor and capacitor. In the astable mode, both the duty cycle frequency are controlled by two external resistors and one capacitor. • Part List: • IC: 555 timer, • LDR, • RELAY: spdt, • LEDs:2, • Resistor:330, 5k ohms • Power Supply: 9 Volts 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