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https://github.com/lightningstalker/induct

Calculators and utilities for real-world electronic design
https://github.com/lightningstalker/induct

antenna-design antennas calculator-c calculators damping electronics frequency oscillators radio rf-calculations tesla-coil tuning-guides vfo

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Calculators and utilities for real-world electronic design

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# induct

Calculators and utilities for real-world electronic design



## iloc

iloc.c is a very simple calculator program for designing single layer air coils,

including space wound coils having a length equal to or greater than 4 times

their diameter. For single turn inductances and shorter coils, I encourage you

to consult the fine work of the late Nagaoka who published tables and formulas

for his correction coefficient. This was not a concern for the scope of this

simple calculator as such inductances are not seen or desirable outside of

antenna systems or above UHF frequencies. I may decide to revisit this should

the need arise.



Most calculators found online need either length or turns count to generate a

result. As they are both mathematically related, this has been simplified to a

single term in the form of turns spacing. Thus all that is required is target

inductance, diameter, and the turns spacing value to derive both length and

turns count. I have found this much easier when designing coils, especially

spacewound coils.



Eventually the capability to output capacitance and self resonant frequency

would be ideal, however the available formulas do not appear to be accurate

enough to produce a result that would allow one to design and build a component

such as a trap with any kind of accuracy. Maybe it's asking a bit too much right

now. Taking it slow and careful with the incremental progress thus far is

producing some results albeit at such a glacial pace.



## tankfreq

tankfreq.c is another very simple program which will calculate LC tank circuit

resonance frequency as might be expected. 



## elcut

elcut.c is a very very simple calculator designed as an antenna tuning aid. It

will give the estimated length to remove from a wire in order to bring it to the

desired resonance frequency as entered. It is recommended never to remove the

exact amount given but instead gradually and carefully reach the resonant

length. As in the oft repeated words of Guy Wireson (whom has died), "You can

take more off but you can't put more back on." If you don't think that's funny

at least consider it my gift to you as the only person who will ever read this.



## cap

cap.c is the capacitor complement to iloc. It calculates dimensions for

capacitors of several different shapes. Simply provide the K permittivity

constant for the dielectric material and various dimensions as they are called

for. Though the algorithm is extremely simple, even moreso than the other

calculators in this collection, it does speed up the process and make for less

time entering formulas into a calculator (and less chance for mistakes).



### Command line options are:

* -p = flat plate capacitor

* -c = cylindrical capacitor

* -? = list of command line options