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Sunday, May 29, 2016

How to Make Simple 6V Emergency Light For Home

Make Emergency Light today. It's easy, complete,  powerful, and long Lasting. Today, I am here to give a complete tutorial on 'how to make a simple 6v emergency light' using a compact fluorescent lamp. This lighting device can be easily equipped with a solar panel, then it can be termed as Solar powered emergency light. You can make this device automatic by using a Light Detecting Resister.

[caption id="attachment_756" align="aligncenter" width="456"]Make Emergency Light Make Emergency Light[/caption]



Parts you need to make an emergency light

1. Rechargeable battery 6V,5A

Rechargeable batteries are used to store electric energy. There are different types of batteries having different capacities. Buy a new sulfuric acid-lead battery having 6V and 5 Ampere capacity. It costs around 5$. 

2. Inverter board or Emergency board 6V

The main part of the emergency lamp. Buy a new 6v inverter board or emergency circuit board. There would be two points on the PCB to attach an external transformer. otherwise, you may have to buy an adapter 7.5 V 500 mA. There are other 6 wires on the inverter board for battery,CFL,switch.

Recommending to read: Mini Wind Turbine -Complete DIY Guide

3. Step down Transformer 9 volt 500mA/ adapter 7.5 volt 500 mA

Some inverter boards may have the facility to attach a transformer. The Transformer is used to step down the AC voltage. There is a  rectifier circuit on the board, which converts alternating current to direct current. Transformer costs around 1$. Some boards may not contain a rectifier circuit or facility to attach a transformer, you need to buy a ac adapter 7.5 V 500mA to charge the battery or You can simply build a rectifier circuit using transformer and diodes.

You may enjoy this: Simple Battery Charger- How to Make Guide

4. Compact fluorescent lamp 11w

Buy a new 11 W CFL. It costs around 1$.


5. Switch,2pin wire, connecting wire,plastic box

Costs around 1$


The main part of this project is the inverter board. It costs around 1$. There would be six leads. Which component you want to connect, and which polarity and everything would be printed on most of the circuit board. 




Connect those components properly using a soldering iron as shown in the figure. Proper connection makes an electronic equipment long lasting. Then place those components in a plastic box to make it compact.

Total cost=9$


Connection procedure

1. Connect the transformer to the inverter board.

2. Connect switch,2 pin wire to transformer input,CFL etc

3. Connect the battery

Tips and warming

1. Connections must be properly soldered. Proper connections makes electronic devices long lasting.

2. Do not touch the output wires for CFL, because there may be several hundred volts.

3. M
ake sure positive wire is connected to the positive terminal of the battery when connecting inverter board to battery.

4. Initially, Charge the battery for 5-6 hours for better performance.

5. Enclose all the components in a box and place it where children can't reach

6. Bare connections must be insulated to avoid short circuits

How to Make Emergency Light Video


How to Make Automatic LED Emergency Light

 Make emergency light, make simple emergency light, diy emergency circuit, cfl emergency light.

We have discussed "how to make a simple emergency light using CFL at your home". After publishing that post we realized the amount of potential visitors is very large. We conducted an analysis of the traffic sources and keywords to the article and concluded that most of the people need emergency lights working on light emitting diodes other than compact fluorescent lamps. I think this is because of the high energy efficiency of LEDs. Some people searched for solar powered emergency light.



Here I am going to share a simple emergency light circuit using LED. The 6v battery can be charged by either solar panels or rectifier circuits. This device is based on an LDR (Light Detecting Resistors). An LDR can detect any changes in the intensity of light. In previous emergency circuit, there is a direct method to detect the power failure. Here, an LDR is used to detect the power failure. This automatic emergency circuit will trigger an Series of LED's when there is a darkness in a room. The LDR will conduct electricity only when there is light in the room. This is the working principle of LDR based automatic Emergency lights.

Things you should have to build an Automatic Emergency light using LED

  •      Battery - 6v - 1

  •      R1,R2 resistor - 10k - 2

  •      R3 resistor - 1K - 10

  •      T1 transistor - BD140 - 1

  •      T2 transistor - BD139 - 1

  •      VR variable resistor - 50K - 1

  •       LDR -1

Devices and other equipments

  •    Soldering iron

  •    Box to enclose the emergency

  •    Copper wire

Circuit of a Automatic Simple Emergency Light Using LED and LDR


                   Recommending to read: How to make Small Wind Turbine -Complete DIY Guide

How does it work?

An LDR is made in a way that it only conducts electricity if there is enough light in the room. The resistance offered by the LDR against  the flow of current is inversely proportional to the intensity of light falls on it. So if there is enough light in a room LDR will continue to conduct current and provides high current to the base of  transistor T1. (so T1 is off). Since the base is grounded transistor T2 is also off. If there is a sudden power failure in the room LDR will stop conducting current. At this time transistor T1 becomes forward biased and provides base current to transistor T2. It then turns ON and allows current to flow through the LED.

How to charge the Battery?

How to make a charger for 6v Lead acid battery? Connect the positive terminal of the charger output to the positive pin of the battery. Then connect negative terminal to the negative terminal of the battery.

How to turn this Emergency light into Solar powered Emergency light!

Recommending to read: How to Make Solar Mobile Charger

Solar Panel
Solar panel

If you are living in an area that not connected to the grid this Solar emergency light can provide enough light for your home. Just buy a 7.5 volt solar panel from the store and connect to the battery. It does not need any separate charger circuit. That's it. Solar powered

automatic emergency light. Enjoy!!


If any one of your friends is from a region where there is no power supply or lacks continuous power supply, you should suggest this device to your friend. Solar powered emergency light is similar to the ordinary one. But it has a solar panel to capture solar power and convert it and recharge the battery.


Sunday, May 22, 2016

How to Make Your Own Solar Panel Or Solar Cell at home?

How to make a simple DIY solar Panel or cells Project for kids? Here in this post, you can learn two simple methods to make an experimental solar cell, for the purpose of impressing your kids. Or you can use this cell as a photodetector. Solar cell manufacturing is a very expensive process, that's why even a small solar installation costs around $1500-$2000. However, you can make a simple solar cell by following some simple instructions as listed below. A solar cell is made up of a semiconductor. They are used to convert the energy from the world's largest renewable energy source, the Sun! Solar radiations carry an enormous amount of energy. It is possible to harness energy from sunlight by using solar cells or solar panels. There are similar devices used to harness other forms of energy from the sun. Solar heaters and parabolic concentrators are used to harness infrared radiations from the sun. A solar cell actually converts the energy of a photon to electricity. Here we are going to make a simple solar cell by using easily available materials. Let's make diy solar panel project.


Method-1 DIY solar Panel at home by using Cuprous Oxide

[caption id="attachment_711" align="alignright" width="244"]Solar Panel Jeda Villa Bali Solar by Bart Speelman, on Flickr[/caption]


In the first method, we use a copper plate to construct a DIY solar Panel

other than silicon-based semiconductors. Materials needed,


1. Copper plate

2. Burner

3. Alligator clips

4. Copper wires

5. Bottle or jar

6. Saltwater

7. Multimeter




1. Take a square sheet of copper about 5-8 inch width.


2. Wash your hands thoroughly and dry them.


3. Remove all the foreign particles from the copper sheet (example:grease)


4. Remove the top oxide layer by using sand paper or emery cloth from both sides.


5. Now you have a copper sheet with bright and shiny red sides.


6. Now we have to create a cuprous oxide layer on the copper plate.


7. Place the plate directly over the burner (highest settings)


8. Wait until a thick black layer of "cupric oxide" to form on the

top surface. It may take up to 30-50 mins.


9. After the heat treatment remove the black layer of cupric oxide

from the copper plate. Usually, it will flake off if you allowed the

plate to cool naturally. Due to the difference in cooling rates of

cupric oxide and copper, it will be very easy to remove the top black



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9. Under the black layer of cupric oxide, you will find another layer

of cuprous oxide which is photosensitive.


10. Cut another piece of copper sheet and bend both pieces gently.

Arrange those both pieces in a bottle or jar without touching one

another. When arranging the plates be careful to place the cuprous

oxide layer face outwards in the jar.


11. Attach two alligator clip leads to both the copper plates.


12. Connect the lead from cuprous oxide to negative terminal of the

meter and copper plate to positive terminal.


13. Then carefully pour a little salt water into the jar by leaving an

inch of the plate above the salt water.


You are done! A simple solar cell is ready. The meter will read up to 50 microamps in the sunshine.

Recommending to read: How to Make Solar Mobile Charger


Method-2 Make a Solar cell Using Transistors


Now we are going to learn "how to make a silicon solar cell" using

transistors. We know that a solar cell is a P-N junction semiconductor. It is possible to build such a solar cell using

transistors. It's easy to cut open a power transistor like the 2N3055 to expose the NPN silicon material inside to make a solar cell. When exposed to sunlight, or household lights, it conducts electricity. The N-type and P-type materials work like a solar cell.


1. Buy power transistors from electronic shop


2. Break the body of the transistor and remove the silicon plate

    without damaging the leads.


3. Yes! it will work as a solar cell.


4. Connect the similar leads of two or more transistors.


5. Check the output of the solar cell using a multimeter in bright sunlight.


Remember that both the solar cells cannot harness energy from the

sunlight to turn on even an LED. These solar cells cannot be used to generate much more electricity. But can be used as a photo-detector for school experiments.

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