#INDUCTOR

2025-08-13
2025-06-15

๐Ÿ’จ๐Ÿ’จ๐Ÿ’จ
AMSTERDAM
โŒ
โŒ
โŒ
๐Ÿ‡ณ๐Ÿ‡ฑ

The Lotus by Now In Hale
Italian design & made in Switzerland
๐Ÿ‡ฎ๐Ÿ‡น๐Ÿ‡จ๐Ÿ‡ญ๐Ÿ‡ช๐Ÿ‡บ
@now.inhale
www.nowinhale.com

and

The beautiful & powerful
INDUCTOR by
Camouflet ๐Ÿ‡จ๐Ÿ‡ฆ
www.Camouflet.com













2025-05-27

๐Ÿ’จ๐Ÿ’จ๐Ÿ’จ
The ๐Ÿ’š
Powered by the ๐Ÿฅฐ on

by @camouflet_ ๐Ÿ‡จ๐Ÿ‡ฆ

Bud's from brother @NLDRY

โ€จ

2025-05-26
2025-05-26
2024-06-14

@KC1PYT Here's the NEC output for a shortish wire #antenna at #HF. Suppose you want to load this for the 20 m band. The real impedance at 14 MHz is 36.6ฮฉ (nothing a lone #inductor can do about that) and the reactance is -207.5iฮฉ, so we want a series reactance of 207.5iฮฉ to cancel it, which at 14 MHz is 2.35 ยตH (that's just X=2ฯ€fL). So you could make a suitable loading coil for 14 MHz with 5 turns of a 5 cm radius, 10 cm long coil (L=ยต0N^2A/l, or about 2.4 ยตH for N=5, A=ฯ€0.05^2 and l=0.1).

A screenshot of xnec2c, showing the impedance of a random wire antenna from 3 MHz to 30 MHz, with a resistance/reactance graph and a Smith chart.
i4cy ๐Ÿ“Œi4cy
2024-04-24

I have just 3D printed and built the USB Communication Kit for the DerEE DE-5000 LCR meter. The interface works great!

thingiverse.com/thing:2551379

[28/06/2021]

i4cy ๐Ÿ“Œi4cy
2024-04-24

Comparing my old home designed PIC LCR meter that has served me well for 20 years, with my new DE-5000 LCR meter. Both meters seem to be close enough when testing this 0.1ยตF capacitor โ€“ a good start!


[17/06/2021]

2023-11-21
2023-11-13

I cracked a #transformer and the shards of the core did not stick to metal. What!? I thought it was ferrite, useful for its magnetic properties. Can anyone confirm that the cores inside inductors are not actually #magnets ?

#inductor #askfedi #electronics

katch wreckkatchwreck
2023-04-11

nature.com/articles/s41598-022

"The element realized herein is shown to bear the three required and necessary fingerprints of a meminductor, and its place on the periodic table of circuit elements is discussed by extending the genealogy of memristors to meminductors."

2023-02-01

The primary of this mains #transformer that was in a power brick from the 1990s seems to be broken internally.

What else can I use it for? Should I attempt to recycle the magnet wire? Try to rewind the laminated core?

The other two transformers seem fine. They both came from digital clocks.
#making #electrical #salvage #components #inductor

3 mains transformers, the primary of the largest one is hooked up to a cheap component tester which is unable to detect continuity or measurable resistance, etc.

Winding Your Own Small Coils

Depending on what you build, you may or may not run into a lot of inductors. If you need small value coils, it is easy to make good-looking coils, and [JohnAudioTech] shows you how. Of course, doing the winding itself isn't that hard, but you do need to know how to estimate the number of turns you need and how to validate the coil by measurement.

[John] uses a variety of techniques to estimate and measure his coils ranging from math to using an oscilloscope. He even uses an old-fashioned nomogram from a Radio Shack databook circa 1972.

In fact, we get the idea that [John] really misses Radio Shack. In addition to the book, we noted guest appearances from a Radio Shack calculator and a caliper. We were a bit surprised that he didn't use a Radio Shack pen as a coil form.

Traditionally, if you wanted to keep your coils from moving much, you'd paint them with "coil dope" or "Q dope" which doesn't interfere much with the coil's desirable characteristics. You can buy it, still, but it is also fairly easy to make by dissolving styrofoam packing peanuts.

If you need a variable inductor, you can make those, too. If, however, you are making a lot of inductors, consider automation.

#parts #coil #coils #inductor #inductors

image
mc โ˜•mc@qoto.org
2021-12-10

> Chua in his 1971 paper identified a theoretical symmetry between the non-linear #resistor (voltage vs. current), non-linear #capacitor (voltage vs. charge), and non-linear #inductor (magnetic flux linkage vs. current). From this #symmetry he inferred the characteristics of a fourth fundamental non-linear circuit element, linking magnetic flux and charge, which he called the #memristor. In contrast to a linear (or non-linear) resistor the memristor has a dynamic relationship between current and voltage including a #memory of past voltages or currents.

en.wikipedia.org/wiki/Memristo

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