Automatic Water Pump Controller

Introduction
We face many problems when we use water pump every day life. Water spill unknowing of water level at the time of pump operation. run out of water when doing some thing such as taking bath. the objectives of this project is to find solution of problems associate with filling of overhead water tanks using electronic pump. Also knowing of water level of water tank. stop operation of pump when water get contaminated with such as mud.

Methodology
A micro-controller used as controller of the system. To measure water level a water level sensor based on electric conduction of water was used. these sensors were fixed on , lowest, highest and mid level of the tank. To sense impurities of water, a sensor to measure transparency of water is fixed at the entry point of water from the well. This sensor consist of LED bulb and photo-diode allowing water flow in between. also there is a water sensor about 6 inch above the water entry point of well, to sense presence of water.
A relay used to operate water pump. Water level, status of water pump and quality of water is displayed on LCD display.

The Circuit

Automatic water pump and water level display

The Circuit was drawn using CorelDRAW software and printed circuit board was fabricated using screen printing method and Ferric Chloride solution to dissolve exposed copper. 

Printed Circuit Board layout

මෙම ලිපියෙහි සිංහල පරිවර්තනය සඳහා පිවිසෙන ඉලෙක්ට්‍රොනික ලෝකය  
 

Story of Electricity - 1

Electricity and Electric operation equipment have become essential part of our every day life. Today, even few minutes of power cut have major effect on our life. we feel like we have gone to stone age all the sudden.

But thousands of year ago the electricity bring only destruction to human world. The lightning, electricity to early human caused making forest fire, destruction to trees, blogs of stones some times coursed lost of life to human as well as animals only. They might not have slightest imagination that the same day future the electricity become a slave. 

Before knowing the properties of electricity, the early human known about electric eel and lighting have some thing common. According to the Egyptian papyrus dating back 2750BC, the electric eel was known as 'Thunderers of the Nile'

Amber is fossilized tree resin made by nature solidified over millions of years. at around 6th century BC The people lived in Mediterranean sea coastal areas trade amber. and also made jewelry out of amber. they have observed that when the amber was rubbed against wool, smaller lighter things such as smaller feathers get attracted. 

One person try to explain this phenomenon is Thales. He lived in Miletus, modern day Turkey. He is the one of first Greek philosopher. He was coined as 'Father of Greek philosophy' by Aristotle. Also he is named as 'Father of Science'.
The force of attraction by the Amber is explained by the Thales as magnetic force. He explained it further as magnetic force by friction.

After the Thales, amber and the magnetic force by the amber was forgotten to the world of science. the experiments about the amber and the forces by amber began at around 1600AD after 2200 years.

මෙම ලිපියෙහි සිංහල පරිවර්තනය සඳහා පිවිසෙන ඉලෙක්ට්‍රොනික ලෝකය