please help in making coil

[dodo_8008]

please i want the law used to make a coil with certain impediance

by determining the thickness of the wire, the radius of the core, the kind if the core,
the length of coil .......please i want this with drawing if available...if not available the formula is ok


please i want your reply in shortest time


thanks

 

[IanP]

One of the simplest coils is a single-layer close-wound air-cored coil ..
Its inductance can be calculated using the so called Wheeler's Formula:
**broken link removed**
and its impedance is:
Z=ωL=2Πf * L

Regards,
IanP

 

[jpsmith123]

Hello,

If you do a search using the phrase: "inductance calculator", for example you can find some online calculators; e.g.:

**broken link removed**

**broken link removed**

There are many more, including specialized calculators for tesla coil inductors, for example:

http://www.classictesla.com/fantc/fantc.html

Lastly, attached is a zip file with two PDFs (not scanned) regarding inductance calculations.

 

[dodo_8008]

FIRST THANKS

ALL YOUR REPLIES DIDNOT CONTAIN THE DISTANCE BET. EACH TURN

PLEASE HELP

 

[jpsmith123]

Perhaps "Wheeler's Formula" would be of help?

Single layer air core solenoid:

L (uH) = n^2 * r^2 / (9 * r + 10 * l)

where

r = coil radius in inches
l = coil length in inches
n = number of turns

**broken link removed**

 

[dodo_8008]

I WOULD LIKE TO THANK YOU,,,,BUT THE FORMULLA DIDNOT MENTION ABOUT THE THICKNESS OF THE WIRE ,EX:1MM,,0.2MM,,,,....THINGS LIKE THAT

 

[IanP]

With all due respect, the Wheeler Formula contains "things like that" but they are hidden in the diameter of the coil (internal diameter + radius of wire) and in its length (munber of turnes + gaps between them) .. see picture below ..
Once again, I encourage you to look in:
**broken link removed**
and carefully read conditions and you will find "things like that" ..

Regards,
IanP