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Return to BlogAutomatic Lamp Control with Light Sensitive Switch
Posted Jan 14, 2012 at 9:27 am
Figure 1
The circuit above is an light sensitive automatic switch which functions in absence of light. The IC 4060 works as an oscillator and the generated signal is applied to the base of T4 transistor. Phototransistor T3 is in conduction by existence of light and it keeps the T5 transistor’s base at ground potential.
When no light reaches the phototransistor, it gets in insulation. T3 reaches positive potential through 22kohm. T4 and T5 both gets in conductance. The oscillator signal reaches the optic coupler and lamp(s) shines.
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4 years ago: Heelo, Please give me the detail information about this as this project is selected as part of college project and I have to complete this today. thank you
4 years ago: I want detail information about automatic lamp control with automatic light sensitive switch.I have to complete this project today.
4 years ago: Hi, what do you want to learn about the circuit? What is the problem?
4 years ago: I want detail information how is the construction of circuit.
4 years ago: can u give me review article on this
3 years ago: hi,i wanted a detailed information concerning the above title coz its part of my project
3 years ago: what would be the cost of this switch in market?
2 years ago: Is this for 230v or 110v ???
2 years ago: this circuit has been used for so many years and yet still very effective especially in street lights...
2 years ago: does the circuit uses light dependent resistor (LDR) to detect the functionality of the switch?
2 years ago: Heelo, Please give me the detail information about this as this project is selected as part of college project and I have to complete this today. thank you
2 years ago: Please give me the detail information about this project.
2 years ago: Hi, can i get complete information and the parts used in the above circuit.
1 year ago: Hi! Can you please give me the details of who made this project and when? Thank you! I'm going to use it as reference for my Investigatory Project. :)
11 months ago: what device makes the light to be automatic?
8 months ago: Plz could i get the information as to how to make it.........we have the exact material but unable to make it out because of some problem in the circuit.