Introduction: Salt Water Study Lamp

Picture of Salt Water Study Lamp

We all know education is the foundation of a person. But in many developing and poor countries, there are many children who can't attain education because of limited facilities. Many houses are there without electricity. As a result, even students who are going to school cannot study at home. My project is to create a cost-free study lamp for my brothers and sisters.

Step 1: Making the Apparatus

Picture of Making the Apparatus
  1. A plastic bottle is taken.
  2. Two holes are made on it and magnesium and iron electrodes are kept in the bottle through the holes.
  3. Make a strong solution of salt (about 200 grams of salt per liter) and pour it into the plastic bottle.

  4. The holes are filled with M-seal so that the salt water does not flow out through it.
  5. A wire is connected to each of the electrodes outside.
  6. These wires are connected to a voltmeter. But we could get only a small voltage which is inadequate to light the study lamp.
  7. The electric current coming from the salt water is of low voltage and can be converted to a higher voltage using "Joule Thief".
  8. Thus the above Joule Thief circuit is connected to LED bulbs and a student could study up to 2 hours continuously.

Comments

rimar2000 (author)2014-03-07

Where do you get magnesium wire?

sreyassony (author)rimar20002014-03-08

Magnesium electrode is not necessary. You can use even crushed aluminium foil as electrode. I used magnesium to make it more efficient.