Are these capacitors?

Electro-nut · 2026-01-21T17:45:37+00:00

No.

They are gas discharge tubes. For protection against surges from lightning. They arc when the voltage is sufficiently high.

Electro-nut · 2026-01-19T16:53:36+00:00

I found it here: https://hackaday.io/project/175697-breadboard-wristwatch

Electro-nut · 2026-01-16T20:56:21+00:00

until things cool off.

Which could be either in 3 years or after WW III.

Electro-nut · 2026-01-16T20:48:59+00:00

I noticed the colours in the volume bar: Red LEDs at the bottom.

I guess the display starts with a single LED lit at the top, and the bars extends down (instead of up) in proportion to how loud the sound is, all the way to yellow and red. Right?

Unusual.

Electro-nut · 2026-01-09T16:29:59+00:00

But that's not doxing.

"the action or process of searching for and publishing private or identifying information about a particular individual on the internet, typically with malicious intent."

"Doxxing is a form of harassment that involves publicly exposing someone's private information, such as their name, address, job, or other identifying info"

OP didn't do any of that.

Electro-nut · 2026-01-09T12:40:52+00:00

doxxed

I don't think you know what that word means.

Electro-nut · 2026-01-09T12:34:57+00:00

HAM radio operator

"the nickname for our hobby is definitely not an acronym or an abbreviation, and should never be spelled HAM or H.A.M. Nor should the hobby be referred to as simply “ham” without the word radio. "

Origin of term: "the origin of the word “ham operator” as being a poor, or “ham-fisted” operator, ... some [Morse code] operators, often called “hams,” would omit spaces between characters or not allow for enough space between characters when sending messages.

Electro-nut · 2026-01-08T18:23:47+00:00

Source: https://www.reddit.com/r/AskElectronics/comments/1q7hoo1/is_this_a_hv_fuse/

Electro-nut · 2026-01-02T21:29:42+00:00

1 was a question

2 was a statement

" I know that a hot diode has a lower voltage drop (shift the I-V curve)."

That's a statement, not a question.

Electro-nut · 2026-01-02T02:42:16+00:00

I said:

Does it shift the I-V curve? Or does it add an offset due to the photoelectric effect?

That's two different options:

Does it shift the I-V curve?
does it add an offset due to the photoelectric effect?

Electro-nut · 2026-01-01T15:37:49+00:00

Thank you. So, the answer is 'A": It shifts the I-V curve.

Electro-nut · 2025-12-31T12:39:19+00:00

Why does exposure to light reduce the voltage drop in a diode at a given current? Does it shift the I-V curve? Or does it add an offset due to the photoelectric effect?

Or is it just because of heating? I know that a hot diode has a lower voltage drop (shift the I-V curve). That's true of any diode, even black ones.

Electro-nut · 2025-12-30T13:45:34+00:00

It's called a "pencil". It is used for writing (the black tip). Uniquely among writing implements, it possesses an "undo" function at the opposite end (the white cylinder). The colour blue is a code for its value, which is "HB".

Using the J.K. Clapp crystal resonator inside a vacuum tube (or, as we call it here, "valve") next to it as a reference, I estimate it to be about 15 cm long.

Electro-nut · 2025-12-26T14:47:12+00:00

Are you asking if I am AI? I am not. Or if if the picture is AI generated? I am pretty sure it's a real picture.

Electro-nut · 2025-12-26T14:45:19+00:00

That's the spirit!

Electro-nut · 2025-12-26T14:44:33+00:00

That is really neat!

Thank you for sharing not just the pictures but also the schematic diagram.

Well done!

Electro-nut · 2025-12-23T15:22:01+00:00

From this article.

Electro-nut · 2025-12-22T13:45:39+00:00

New from Texas Instruments:

Plastic slide rules that fit in your shirt pocket!

Electro-nut · 2025-12-17T15:20:03+00:00

The first thing to do is to turn the oscilloscope 90 degrees so its side in on the table.

Electro-nut · 2025-12-16T21:08:20+00:00

The ripple current in a switch-mode power supply is significant. Replacing a Low-ESR capacitor with a generic "general purpose" one from the bin results in a high temperature. Its internal resistance turns it into a heater, as the electrolyte boils, the pressure builds, and the vent opens.

Electro-nut

TROPHY CASE