A Revised Inductance Calculator

[Gary Lecomte]

Hi All, I have revised my Java Script Inductance Calculator. It now
covers the wire ranges from 1 to 45 Awg, including the half gauges
from 10 1/2 Awg to 25 1/2 Awg. Most people aren't even aware these
exist.

I have also tested it with numerous known coils for accuracy. This
Calculator take into account the typical insulation thickness of
Single Coated Enamel Wire, as this is important for accurate
calculations on smaller gauges.

http://www3.telus.net/chemelec/Calculators/A-Inductance.htm

If Interested, Check it out.

Take care......Gary

 

[John Jardine]

Gary Lecomte <chemelec@hotmail.com> wrote in message
news:ca76d1a9.0307301451.2a99d62e@posting.google.com...

Hi All, I have revised my Java Script Inductance Calculator. It now
covers the wire ranges from 1 to 45 Awg, including the half gauges
from 10 1/2 Awg to 25 1/2 Awg. Most people aren't even aware these
exist.

I have also tested it with numerous known coils for accuracy. This
Calculator take into account the typical insulation thickness of
Single Coated Enamel Wire, as this is important for accurate
calculations on smaller gauges.

http://www3.telus.net/chemelec/Calculators/A-Inductance.htm

If Interested, Check it out.

Take care......Gary

For curiosity, as a reel of bare wire was next to the keyboard, wound a
random coil on a pencil ... (equiv') 25Awg, 0.833" long, 0.328 diameter, 12
turns pulled out to that length. Measured as 1.0uH (GenRad 1685 digital
Impedance meter). The L calculator said "0.5uH". Was going to whinge but
have just found my sodding LCR meter is faulty.
Yes, your calculator works well
regards
john

 

[Active8]

In article <ca76d1a9.0307301451.2a99d62e@posting.google.com>,
chemelec@hotmail.com says...

Hi All, I have revised my Java Script Inductance Calculator. It now
covers the wire ranges from 1 to 45 Awg, including the half gauges
from 10 1/2 Awg to 25 1/2 Awg. Most people aren't even aware these
exist.

I have also tested it with numerous known coils for accuracy. This
Calculator take into account the typical insulation thickness of
Single Coated Enamel Wire, as this is important for accurate
calculations on smaller gauges.

http://www3.telus.net/chemelec/Calculators/A-Inductance.htm

If Interested, Check it out.

Take care......Gary

..03uH coil - rounds to .1uH (.0001mH)

32 AWG one turn coil on .25" ID should be 1 turn. program solves to 3
turns prob due to rounding.

mike

 

[Active8]

In article <ca76d1a9.0307301451.2a99d62e@posting.google.com>,
chemelec@hotmail.com says...

Hi All, I have revised my Java Script Inductance Calculator. It now
covers the wire ranges from 1 to 45 Awg, including the half gauges
from 10 1/2 Awg to 25 1/2 Awg. Most people aren't even aware these
exist.

I have also tested it with numerous known coils for accuracy. This
Calculator take into account the typical insulation thickness of
Single Coated Enamel Wire, as this is important for accurate
calculations on smaller gauges.

http://www3.telus.net/chemelec/Calculators/A-Inductance.htm

If Interested, Check it out.

Take care......Gary

why not add core permeability input and std core dropdown/combo?

 

[Active8]

In article <ca76d1a9.0307301451.2a99d62e@posting.google.com>,
chemelec@hotmail.com says...

Hi All, I have revised my Java Script Inductance Calculator. It now
covers the wire ranges from 1 to 45 Awg, including the half gauges
from 10 1/2 Awg to 25 1/2 Awg. Most people aren't even aware these
exist.

I have also tested it with numerous known coils for accuracy. This
Calculator take into account the typical insulation thickness of
Single Coated Enamel Wire, as this is important for accurate
calculations on smaller gauges.

http://www3.telus.net/chemelec/Calculators/A-Inductance.htm

If Interested, Check it out.

Take care......Gary

the LC calc... a designer would want to know what cap to use for given L
and f or what L for given C & f. my programs use a "solve for" check box
next to the text inputs.

nice wind chill charts, i think. i have this nomogram, but it calculates
comfort level. any idea how that corresponds to temp?

mike

 

[Active8]

In article <bg9rlr0vav@drn.newsguy.com>, whill@picovolt.com says...

chemelec@hotmail.com wrote...

Hi All, I have revised my Java Script Inductance Calculator. It now
covers the wire ranges from 1 to 45 Awg, including the half gauges
from 10 1/2 Awg to 25 1/2 Awg. Most people aren't even aware these
exist.

I have also tested it with numerous known coils for accuracy. This
Calculator take into account the typical insulation thickness of
Single Coated Enamel Wire, as this is important for accurate
calculations on smaller gauges.

Have you tested it with my extensive list of 0.03% measured
values on a wide range of coils, posted here on s.e.d. some
years back? These were used to test the Wheeler formulas,
and the highly-authoritative Grover formulas and tables.

is that achived at google? if so, what's the subject line to search on.

mike

BTW love the book, if i haven't already told you directly.

Better yet, post your formulas or references.

http://www3.telus.net/chemelec/Calculators/A-Inductance.htm

If Interested, Check it out.

Just a few points to improve your professional appearance:

American Wire Gauges are in AWG, not Awg (see twice in the
first sentence), and millihenry is mH, not Mhy. Shouldn't
folks have the option of using metric units of size? Also,
sci.electronics hasn't been a valid newsgroup for many years.

BTW, what does Chemelec mean? Does it relate to chemistry?

Thanks,
- Win

 

[Richard Crowley]

"Active8" wrote ...

the LC calc... a designer would want to know what cap
to use for given L and f or what L for given C & f. my
programs use a "solve for" check box next to the text
inputs.

Capacitance-Frequency-Inductance CALCULATOR
http://www.opamplabs.com/cfl.htm

also...
Voltage-Current-Resistance-Power CALCULATOR
Resistance-Frequency-Capacitance CALCULATOR
dbm-Voltage-Impedance CALCULATOR
Zener Voltage Regulator CALCULATOR
Loan-Monthly Payments CALCULATOR

 

[DarkMatter]

On 30 Jul 2003 18:33:47 -0700, Winfield Hill <whill@picovolt.com> Gave
us:

Better yet, post your formulas or references.

Grab the source from his calculator.

 

[DarkMatter]

On Thu, 31 Jul 2003 02:09:37 GMT, Active8
<mcolasono@earthlink.net.invalid> Gave us:

In article <ca76d1a9.0307301451.2a99d62e@posting.google.com>,
chemelec@hotmail.com says...
Hi All, I have revised my Java Script Inductance Calculator. It now
covers the wire ranges from 1 to 45 Awg, including the half gauges
from 10 1/2 Awg to 25 1/2 Awg. Most people aren't even aware these
exist.

I have also tested it with numerous known coils for accuracy. This
Calculator take into account the typical insulation thickness of
Single Coated Enamel Wire, as this is important for accurate
calculations on smaller gauges.

http://www3.telus.net/chemelec/Calculators/A-Inductance.htm

If Interested, Check it out.

Take care......Gary


why not add core permeability input and std core dropdown/combo?

That's just it. Ten turns of wire bears out a different inductance,
and the difference is the core configuration!

Also making the same inductance across ten different core types will
make ten equal value inductors, but they will all perform entirely
differently one to another. Raw sines are one thing, but complex
waveforms behave differently than the simple LCR bridge stimulus.

 

[Gary Lecomte]

Active8 <mcolasono@earthlink.net.invalid> wrote in message news:<MPG.199243f29205542498972c@news.east.earthlink.net>...

In article <ca76d1a9.0307301451.2a99d62e@posting.google.com>,
chemelec@hotmail.com says...
Hi All, I have revised my Java Script Inductance Calculator. It now
covers the wire ranges from 1 to 45 Awg, including the half gauges
from 10 1/2 Awg to 25 1/2 Awg. Most people aren't even aware these
exist.

I have also tested it with numerous known coils for accuracy. This
Calculator take into account the typical insulation thickness of
Single Coated Enamel Wire, as this is important for accurate
calculations on smaller gauges.

http://www3.telus.net/chemelec/Calculators/A-Inductance.htm

If Interested, Check it out.

Take care......Gary

.03uH coil - rounds to .1uH (.0001mH)

32 AWG one turn coil on .25" ID should be 1 turn. program solves to 3
turns prob due to rounding.

mike

Hi Mike, Pretty Small Coil. Yes, this is due to Rounding. I can fix
this, but even if I change this, the next person will come up with a
..003 uH coil, or even smaller. How small should I go?

Take care.......Gary

 

[Active8]

In article <vii5hdi5suq521@corp.supernews.com>, rcrowley7@xprt.net
says...

"Active8" wrote ...
the LC calc... a designer would want to know what cap
to use for given L and f or what L for given C & f. my
programs use a "solve for" check box next to the text
inputs.

Capacitance-Frequency-Inductance CALCULATOR
http://www.opamplabs.com/cfl.htm

also...
Voltage-Current-Resistance-Power CALCULATOR
Resistance-Frequency-Capacitance CALCULATOR
dbm-Voltage-Impedance CALCULATOR
Zener Voltage Regulator CALCULATOR
Loan-Monthly Payments CALCULATOR



thanks. i really don't need any calculators. i write my own. i'm just

looking around for different L calc to compare to another program, the
accuracy of which is suspect.

that loan calc...

i used a loan pmt formula out if a TI calculator book once when i was
16. and when i went to the bank for a loan for my first car, I found out
that the bank didn't calculate payments based on that formula.

mike

 

[Active8]

In article <bgb6ra$obm$1@titan.btinternet.com>,
g4fgq.regp@btinternet.com says...

How do you define 'length' of a coil?

Is it the axial distance between the two extreme ends of the wire, or is it
the distance between the wire centres at the ends of the coil? Or is it the
number of turns times the winding pitch.

Or what is it? It matters when there are not many turns.

What do Grover, Wheeler, etc., have to say about it?
----
Reg

i'd like to know, too. how long is a 1 turn coil?

wouldn't the center to center distance be the same as N X pitch ?

mike

===============================

"Gary Lecomte" <chemelec@hotmail.com> wrote in message
news:ca76d1a9.0307301451.2a99d62e@posting.google.com...
Hi All, I have revised my Java Script Inductance Calculator. It now
covers the wire ranges from 1 to 45 Awg, including the half gauges
from 10 1/2 Awg to 25 1/2 Awg. Most people aren't even aware these
exist.

I have also tested it with numerous known coils for accuracy. This
Calculator take into account the typical insulation thickness of
Single Coated Enamel Wire, as this is important for accurate
calculations on smaller gauges.

http://www3.telus.net/chemelec/Calculators/A-Inductance.htm

If Interested, Check it out.

Take care......Gary

 

[Active8]

In article <hn7iivs2m80g4oitsj3qkuj1nd92s1ia40@4ax.com>,
DarkMatter@thebarattheendoftheuniverse.org says...

On 30 Jul 2003 18:33:47 -0700, Winfield Hill <whill@picovolt.com> Gave
us:


Better yet, post your formulas or references.


Grab the source from his calculator.

if you can read JS.

 

[Reg Edwards]

How do you define 'length' of a coil?

Is it the axial distance between the two extreme ends of the wire, or is it
the distance between the wire centres at the ends of the coil? Or is it the
number of turns times the winding pitch.

Or what is it? It matters when there are not many turns.

What do Grover, Wheeler, etc., have to say about it?
----
Reg

===============================

"Gary Lecomte" <chemelec@hotmail.com> wrote in message
news:ca76d1a9.0307301451.2a99d62e@posting.google.com...

Hi All, I have revised my Java Script Inductance Calculator. It now
covers the wire ranges from 1 to 45 Awg, including the half gauges
from 10 1/2 Awg to 25 1/2 Awg. Most people aren't even aware these
exist.

I have also tested it with numerous known coils for accuracy. This
Calculator take into account the typical insulation thickness of
Single Coated Enamel Wire, as this is important for accurate
calculations on smaller gauges.

http://www3.telus.net/chemelec/Calculators/A-Inductance.htm

If Interested, Check it out.

Take care......Gary

 

[Ben Bradley]

In sci.electronics.design, Active8 <mcolasono@earthlink.net.invalid>
wrote:

In article <bg9rlr0vav@drn.newsguy.com>, whill@picovolt.com says...
chemelec@hotmail.com wrote...

Hi All, I have revised my Java Script Inductance Calculator. It now
covers the wire ranges from 1 to 45 Awg, including the half gauges
from 10 1/2 Awg to 25 1/2 Awg. Most people aren't even aware these
exist.

I have also tested it with numerous known coils for accuracy. This
Calculator take into account the typical insulation thickness of
Single Coated Enamel Wire, as this is important for accurate
calculations on smaller gauges.

This somehow didn't get attributed, but it was written by Win Hill:

Have you tested it with my extensive list of 0.03% measured
values on a wide range of coils, posted here on s.e.d. some
years back? These were used to test the Wheeler formulas,
and the highly-authoritative Grover formulas and tables.

is that achived at google? if so, what's the subject line to search on.

I've put in some likely keywords and got topics with subject lines
of "If I only had a brain" and "tomato launcher" which Win
participated in back in 1977. I've only been a semiregular here for a
year or two, looks like I missed a lot of good threads.

mike

BTW love the book, if i haven't already told you directly.

Megaditto's. [I gotta stop listening to talk radio]

 

[Active8]

In article <3f294799.5206527@newsgroups.bellsouth.net>,
ben_nospam_bradley@mindspring.com says...

In sci.electronics.design, Active8 <mcolasono@earthlink.net.invalid
wrote:


In article <bg9rlr0vav@drn.newsguy.com>, whill@picovolt.com says...
chemelec@hotmail.com wrote...

Hi All, I have revised my Java Script Inductance Calculator. It now
covers the wire ranges from 1 to 45 Awg, including the half gauges
from 10 1/2 Awg to 25 1/2 Awg. Most people aren't even aware these
exist.

I have also tested it with numerous known coils for accuracy. This
Calculator take into account the typical insulation thickness of
Single Coated Enamel Wire, as this is important for accurate
calculations on smaller gauges.

This somehow didn't get attributed, but it was written by Win Hill:

Have you tested it with my extensive list of 0.03% measured
values on a wide range of coils, posted here on s.e.d. some
years back? These were used to test the Wheeler formulas,
and the highly-authoritative Grover formulas and tables.

is that achived at google? if so, what's the subject line to search on.

I've put in some likely keywords and got topics with subject lines
of "If I only had a brain" and "tomato launcher" which Win
participated in back in 1977. I've only been a semiregular here for a
year or two, looks like I missed a lot of good threads.

heh, heh. that's two of us. NGs turn up some funny stuff at times. I'm
hoping Win will come back and zero me in on that thread.

mike

mike

BTW love the book, if i haven't already told you directly.

Megaditto's. [I gotta stop listening to talk radio]

 

[Gary Lecomte]

"Reg Edwards" <g4fgq.regp@btinternet.com> wrote in message news:<bgb6ra$obm$1@titan.btinternet.com>...

How do you define 'length' of a coil?

Is it the axial distance between the two extreme ends of the wire, or is it
the distance between the wire centres at the ends of the coil? Or is it the
number of turns times the winding pitch.

Or what is it? It matters when there are not many turns.

What do Grover, Wheeler, etc., have to say about it?
----
Reg

I never heard anyone ask this question before.
The Length of the coil is the "MEASURED LENGTH of the windings, END TO
END".
For this calculator and any other formulas (I have seen) to work
accurately, All layers must be equil length.

Take care.....Gary

===============================

"Gary Lecomte" <chemelec@hotmail.com> wrote in message
news:ca76d1a9.0307301451.2a99d62e@posting.google.com...
Hi All, I have revised my Java Script Inductance Calculator. It now
covers the wire ranges from 1 to 45 Awg, including the half gauges
from 10 1/2 Awg to 25 1/2 Awg. Most people aren't even aware these
exist.

I have also tested it with numerous known coils for accuracy. This
Calculator take into account the typical insulation thickness of
Single Coated Enamel Wire, as this is important for accurate
calculations on smaller gauges.

http://www3.telus.net/chemelec/Calculators/A-Inductance.htm

If Interested, Check it out.

Take care......Gary

 

[Tom Bruhns]

chemelec@hotmail.com (Gary Lecomte) wrote in message news:<ca76d1a9.0307310618.378c732b@posting.google.com>...

Active8 <mcolasono@earthlink.net.invalid> wrote in message news:<MPG.199243f29205542498972c@news.east.earthlink.net>...
....

.03uH coil - rounds to .1uH (.0001mH)

32 AWG one turn coil on .25" ID should be 1 turn. program solves to 3
turns prob due to rounding.

mike

Hi Mike, Pretty Small Coil. Yes, this is due to Rounding. I can fix
this, but even if I change this, the next person will come up with a
.003 uH coil, or even smaller. How small should I go?

I have a program that works quite well from very tiny to quite large.
After all, it's just scaling, ummm?? Anyway, it happens to make it
easy to do coils down in the 0.05" diameter region, and they are
sometimes useful. Just wind some wire on a small machine screw; it
will typically hold its shape well when you unscrew the screw from it.

When I have some time I might try comparing your web script with a
program I've learned to trust. No time right now. Does yours give
the equivalent capacitance and self-resonant freqs for the first
parallel and first series resonances? How about Q at some input
frequency? Those are useful.

Cheers,
Tom

 

[Fred Abse]

On Thu, 31 Jul 2003 15:31:15 +0100, Jim Thompson wrote:

What's "wind chill" ?

That sinking feeling you get when you realize that you have just farted in
public

--
Then there's duct tape ...
(Garrison Keillor)
nofr@sbhevre.pbzchyvax.pb.hx

 

[Gary Lecomte]

Active8 <mcolasono@earthlink.net.invalid> wrote in message news:<MPG.1992fe21bc53c57989733@news.east.earthlink.net>...

In article <bgb6ra$obm$1@titan.btinternet.com>,
g4fgq.regp@btinternet.com says...
How do you define 'length' of a coil?

Is it the axial distance between the two extreme ends of the wire, or is it
the distance between the wire centres at the ends of the coil? Or is it the
number of turns times the winding pitch.

Or what is it? It matters when there are not many turns.

What do Grover, Wheeler, etc., have to say about it?
----
Reg

i'd like to know, too. how long is a 1 turn coil?

wouldn't the center to center distance be the same as N X pitch ?

mike

===============================

Quite Simply, a one turn coil is equivalant to the diameter of the
wire you are using.

Take care.......Gary

"Gary Lecomte" <chemelec@hotmail.com> wrote in message
news:ca76d1a9.0307301451.2a99d62e@posting.google.com...
Hi All, I have revised my Java Script Inductance Calculator. It now
covers the wire ranges from 1 to 45 Awg, including the half gauges
from 10 1/2 Awg to 25 1/2 Awg. Most people aren't even aware these
exist.

I have also tested it with numerous known coils for accuracy. This
Calculator take into account the typical insulation thickness of
Single Coated Enamel Wire, as this is important for accurate
calculations on smaller gauges.

http://www3.telus.net/chemelec/Calculators/A-Inductance.htm

If Interested, Check it out.

Take care......Gary