Light Sensitive Automatic On-Off Light:

This diagram shows how to make light-sensitive automatic on-off light. In this circuit diagram, we use a 2 plug, a transistor, an LDR resistor, a DIAC (DB3), a 100k resistor, an adjustment variable, and a light. First, we make the connection between two plugs and the LDR, then from LDR to DIAC, and from DIAC to the adjustment variable, then from the variable to 100k resistor, and then from resistor light. This circuit is ready. If you want to see this circuit connection please check our youtube video below the link.

Diagram of Light Sensitive Automatic On Off Light:

Light Sensitive Automatic On Off Light

Components needed For this Project:

You can get the components from any of the sites below:

  1. 2-Plug [See Buy Click Amazon]
  2. Transistor [See Buy Click Amazon]
  3. LDR [See Buy Click Amazon]
  4. DIAC [See Buy Click Amazon]
  5. Adjustment Variable [See Buy Click Amazon]
  6. Resistor [See Buy Click Amazon]
  7. Light [See Buy Click Amazon]

*Please note: These are affiliate links. I may make a commission if you buy the components through these links. I would appreciate your support in this way!

Components used to make the Light Sensitive Automatic On Off Light:

01. 2-Plug:

Two-Pole Means That the Device Plug is not Earthed and It Normally Has Two Pins That Transmit Electricity. Originally, all Electrical Devices were Fitted with Two-pole Plugs, Which Means that the Devices were not earthed and that all main Sockets were Constructed for 2-Pole plugs. Two-pin Plugs Consist of two flat or Round Pins with one Called “hot” or “live” and the Other Called “neutral”. When Connected to an Electric Circuit, the Current Flows From the live Pins Through The Copper Conductor and into the Device.

02. Transistor:

An electronic device in which the current flows in an amplified form at its output is called a transistor. Transistor is a semiconductor device, which is commonly used as an amplifier and electrically controlled switch. Transistor is a type of electronic device, if any electrical signal is given at the input, that signal is available in an enlarged form at the output. Its function is to amplify any low signal in the electronics circuit and flow in the circuit. Again transistors are used to act as switches in the circuit. Today’s various macro chips are made using thousands of transistors.

03. LDR:

A Photoresistor or (LDR) Light-Dependent Resistor is an Electronic Component that is sensitive to light. When Light Falls Upon it, Then The Resistance Changes. Values of the Resistance of the light-Dependent Resistor may Change over many Orders of Magnitude the Value of the Resistance Falling as the Level of Light Increases. With such a wide Variation in Resistance, Light-Dependent resistors are easy to use and There are Many Light-Dependent resistors (LDR) Circuits Available.

04. DIAC:

A Diode for Alternating Curren (DIAC) is a Full-Wave or bi-Directional Semiconductor Switch That can be Turned on in Both Forward and Reverse Polarities. The name Diode for Alternating Curren comes from the words DIode AC switch. The DIAC (Diode for Alternating Curren) is an Electronics Component that is Widely Used to Assist Even Triggering a TRIAC When used in AC Switches as a result. These Electronic Components are Also Widely used in Starter Circuits for Fluorescent Lamps.

05. Adjustment Variable:

This 100K Preset Variable Resistor Potentiometer has Three Terminals and is Mountable on PCB. This Potentiometer is also Easily Usable with Solderless Breadboards. It’s Also Known as Variable Resistor, Viper, pot, or Trimmer. These 100K Preset Variable Resistor Applications are in Various Electronic Devices, Where There is a Need for Changing the Resistance Values on the fly. This 100K Potentiometer Resistor is also Easily Usable with Solderless Breadboards. It’s also known as Variable Resistor, Viper, pot, or Trimmer.

06. Resistor:

A Resistor is an electrical component that controls the flow of electricity in an electrical circuit. Or we can say in this way that the material or component Which is used to block the flow of current in electronic equipment is called Resistor. And, because of the characteristic of the resistor or conductor that Prevents the flow of current through the conductor, that characteristic or religion is called resistance, where resistance Means the ability to block. The main function of a resistor is to cause a voltage drop to impede the flow of current in the circuit. In this case, the question may arise as to which circuit or which Parts need to be protected from low voltage or current flow.

07. Light:

CFL stands for Compact Fluorescent Lamp which is an improved version of tube lights of earlier days. Like tube lights, it is a vacuum glass tube with fluorescent powder coating which is not as long and straight as tube lights but curved/twisted compact, or small in size. Like a tube light, it has electrodes or filaments at both ends. But in this case, instead of a choke, there is an electronic circuit that drives the Compact Fluorescent Lamp. Because the red wave is less in the light of the Tubelight and Compact Fluorescent Lamp, the object looks a little pale or the correct color of the object does not appear.

Watch to Youtube:

Thank You for visiting the website. Keep visiting for more Updates.

Read more Single Phase Wiring



  1. Electronic Project – Earth Bondhon - […] Light Sensitive Automatic On Off Light […]

Submit a Comment

Your email address will not be published. Required fields are marked *