Author Topic: VIC pictures and Don's VIC notes..  (Read 11542 times)

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Re: VIC pictures and Don's VIC notes..
« Reply #32 on: August 02, 2014, 10:19:46 am »
Hi Sebos
Here is circuit of Busi you want.
andy

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Re: VIC pictures and Don's VIC notes..
« Reply #33 on: August 02, 2014, 10:20:21 am »
Fabio

Please read this
To calculate the wavelength of an Antenna the formula for Wavelength is the Speed of Light ~299,792,458 metres per second divided by the frequency in Hertz. However, because electricity travels slower through some materials than others, there is a need to reduce the speed of light by the Velocity of Propagation also commonly known as the Velocity Factor for example a piece of copper wire has a Velocity Factor of 0.951.
Consequently the formula of a full wave antenna at 2.447Ghz (Channel 8) using copper wire is:
(299,792,458 x 0.951) / 2,4470,000,000 = 112mm
A Half Wave antenna would then be 56mm and a Quarter Wave antenna would be 28mm
Please note: This is only a guide to home made antenna building, when looking around the Internet you'll find many variations to this calculation due of a number of reasons ranging from rounding down/up or ways to match the impedance of the antenna with the feed line.
For example feed lines for Transmitters and Transceivers are 50 Ohms so too Wireless LAN equipment. However a half wave dipole is 72 Ohms and a quarter mono pole is 30 Ohms but for maximum efficiency both feed line and antenna must be the same impedance. Consequently there are many tricks employed to achieve a match and no doubt antenna design is a very complex area, but you'll be surprised of what can be done with a little experimentation, specially as the equipment used in Wireless LAN is very low-powered and therefor the risks of equipment damage and interference is minimal and so well worth having a go.

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Re: VIC pictures and Don's VIC notes..
« Reply #34 on: August 03, 2014, 10:36:04 am »
WFC pics

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Re: VIC pictures and Don's VIC notes..
« Reply #35 on: August 03, 2014, 10:48:27 am »
More pictures of the wfc

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Re: VIC pictures and Don's VIC notes..
« Reply #36 on: August 04, 2014, 14:03:06 pm »
Hi Sebos
Here is circuit of Busi you want.
andy

Thanks a lot andy, i tried to construct but here i see busi used a 1 ohm 20w resistor and probably that way the oscillation indeed work...

However i think is not the best way to measure the capacitance since we are actually measuring the time constant of the water capacitance and resistances... which is not by itself a good value in my understanding.. other measurements must be taken into account like the resistance of the cell to different frequencies and with dc current...

He did it much better than i however since i used 3 ics to make it work.. i can bypass them though


Steve thats very nice pictures...

today i´m going to get the plastics to workout a cell like this for me...

thanks a lot

Fabio

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Re: VIC pictures and Don's VIC notes..
« Reply #37 on: August 06, 2014, 15:59:14 pm »
here some notes of mr. Woodside

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Re: VIC pictures and Don's VIC notes..
« Reply #38 on: August 07, 2014, 16:02:36 pm »
More pictures of the wfc

...first class !

Thanks!
We can think what we want of Stanley, but he builded nice things..
Lets hope we figure out if it did work and that it was efficient....
;-)