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Author Topic: Science  (Read 3756 times)

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AGelbert

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Re: Science
« Reply #60 on: November 13, 2016, 02:24:57 pm »
Illuminate Lightbulbs Wirelessly: DIY Slayer Exciter

 by tanner_tech in wireless

Circuits Contest 2016

Have you ever wanted to be able to control the powers of wireless electricity?       Have you ever wanted to build something that can light CFL bulbs from your hand?   

If so, then this is the perfect instructable for you. In this instructable, I will show you how to build a device called a slayer exciter. The video below will accompany this instructable with a visual demonstration of how it works.

Lets get started!

Step 1: How it Works 8)

A slayer exciter is basically an oscillator that has a frequency based on the LC tank circuit formed by the secondary coil and the parasitic capacitance of the top load. So now to how this circuit works.

First, when power is applied to the circuit, the current flows into the base of the transistor, turning it on. When the transistor turns on, it lets power flow through the primary coil. This induces a current into the secondary coil, which flows into the base of the transistor, turning it off.

When the transistor turns off, the magnetic field collapses letting current flow back into the base of the transistor from the resistor. This cycle repeats many times a second.

Think of this circuit as a swing, if you push somebody an a swing, they will swing forward and backwards and oscillate.

Every time you push the swing, it oscillates, but you have to push it at the right time, or it will lose energy.

The circuit functions like the person pushing the swing. The transistor "pushes" the secondary coil with a magnetic field at the exact right time. This circuit oscillates at about 398 kilocycles.

The constantly expanding and collapsing field creates a powerful RF field around the exciter. This causes the electrons in the CFL to bounce around and strike the phosphors in the glass, lighting the bulb. It creates high voltage because of the turn ratio of the primary to secondary coil. Now to actually building the slayer exciter.

Video below and further instructions at link: 

http://www.instructables.com/id/Illuminate-Lightbulbs-Wirelessly-DIY-Slayer-Excite/

Agelbert NOTE: Always remember that electrical current is never induced by a magnetic field, be it electro-magnetic or naturally magnetic. The electrons in a conductor of electricity move only when a magnetic field it is subjected to collapses. So, you have rebuild the magnetic field and allow it to collapse repeatedly to keep the current flowing to light a CFL bulb, LED and/or, with some fancy circuitry, to  run an electric (OF COURSE!  ;D)  motor. At present, sending the current through wires requires less energy than wirelessly, except in some very limited applications. 
Hope deferred maketh the heart sick: but when the desire cometh, it is a tree of life. Pr. 13:12

 

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