Hi readers.....many students had asked me to create my own blog on WIRELESS DEVICES and here it is. This is dedicated to wireless things, controlling devices and communications projects.

THIS IS ESPECIALLY DEDICATED TO ECE STUDENTS who after all should master ELECTRONIC COMMUNICATIONS.

I will do my best to start you off with a bit of history and human experience in this field. May the Holy Spirit inspire and guide me.


BK


INTRO AND HISTORY

     It is said that the planet earth is 20 billion years old. Jesus was here 2012 years ago and Abraham, 2000 before Him. Then Adam and Eve 3000 years before Abe. Gee, we are recent visitors! Only 7000 years in this planet of millions of planets.

     Let's go. When the caveman saw the lightning, it was his first experience of electricity. It was huge and lethal and can fry a man. He couldn't do anything with it. Let's jump to the 19th century in Europe.  The Europeans loved frog's legs.  They hang in markets like the meat they sell today. To bring it down, metal rods were used. It was always a wonder why the leg would move when the rod gets near it. Nobody knew and many perhaps thought it was the spirit of the dead frog! STATIC ELECTRICITY!

     Then the alchemists came around. Scientists they call themselves and were experimenting with chemicals. Names like Faraday and Volta appeared in the scientists' circle. They discovered that there is electricity in chemicals. Two unlike metals in a solution called ELECTROLYTE produced electricity. Perhaps they used their tongues to feel it. You can do this today. Pierce a iron paper clip and copper wire into a calamansi and taste the ends. You will feel electricity!

     Then they discovered wires ( they already knew about magnets they called loadstones). Wires wrapped around a nail and fed electricity became magnetized and they called it ELECTROMAGNET. Volta theorized  the electric pressure present and later on in his honor, it is called a VOLT. GALVANI invented the GALVANOMETER. It was actually a voltmeter. He made a rocker with a needle then placed a coil in front of it. The strength of the magnet rotated the rocker and the needle. Then AMPERE came into the picture. He said that while there is an electrical pressure, there must be an electrical volume. Actually we later found out it is the amount of electrons moving. In his honor, it is today called an AMPERE.  Ha, there is a third guy called OHM. He says that if V moved the I (for current in ampere), the medium offered a RESISTANCE to the flow. It was later called OHM in his honor. It was OHM who defined the relationship of Electrical Pressure, Volume of electrons, and Resistance. The units were defined as a VOLT, an AMPERE, and an OHM! He says that ONE VOLT pushes ONE AMPERE around a RESISTANCE of ONE OHM. The OHM'S LAW!  E for Electromotive Force in Volts, I for current in Amps, and R for resistance. The relationship:


                                           E=IR


     So, get  a 6V battery, put a light bulb. Measure the current in the line, the resistance is defined to be 6V/ by the current and if it is 1 amp, the R would be 6 Ohms! If the V is 1 Volt, the current is 1 Amp, the Resistance is 1 Ohm!


     THERE WAS AN EXPLOSION OF EXPERIMENTS INVOLVING BATTERIES, WIRES, ELECTROMAGNETS TO MAKE THE BUZZER, MAGNETS ETC.  With the GALVANOMETER AS THE FIRST TOOL, MAN was able to detect electricity. It was also discovered that magnets moved in front of a coil produced electricity! So, magnets can produce electricity to charge the batteries! WHAT A DISCOVERY. Electricity can be STORED!

But there was no light bulb. To produce light from electricity, the arc lamp was used, two pointed carbon touching and creating light. What a waste. In the early 20th century, arc lamps were all over Europe and America. It took EDISON from Ohio to invent the light bulb. There was already the steam engine and the internal combustion engined invented by a German, OTTO. Electric generators were running all  over the planet producing DC electricity! Why DC? Because MAN started off with batteries. A Russian convinced the world that AC is the way to go. TESLA. Today, all over the world, AC is used. It is easier to produce requiring NO commutation in the genset, can be converted into different voltages (transformer) which  can be  transmitted cheaply at high voltages using thinner wires, and can be transformed easily in homes to different voltages.

NEXT......THE VALVES AS THE EUROPEAN CALLED THEM OR TUBES AS THE AMERICANS CALLED THEM. THE BEGINNING OF MAN CONTROLLING ELECTRICITY .