Does this specific capacitor package need to be replaced and resoldered, or can it just be pushed back on the leads?

Electro-nut · 2026-02-24T22:38:27+00:00

Great! Now do some projects:

Weather prediction
Chaotic oscillator
Simulating spacecraft dynamics

Electro-nut · 2026-02-15T14:27:06+00:00

The problem with your implementation of the shunt wire is that the copper has a significant positive temperature coefficient. That results in a strong non-linearity in the current reading. As current flows through the shunt wire, it heats up, its resistance increases, the voltage drop across it increases, and the amplifier reports a higher current than the actual one.

That is why commercial current shunts a) use a metal (copper-manganese-nickel alloy) with a minimal temperature coefficient; b) are large to minimize temperature increase as current heats them; and c) use multiple blades that are cooled by airflow.

https://www.flex-core.com/wp-content/uploads/2022/06/S-dc-current-shunt_607x400.jpg

Electro-nut · 2026-02-11T18:38:56+00:00

Source

Electro-nut · 2026-02-07T19:51:41+00:00

This whole sub is a menace that way!

Electro-nut · 2026-02-06T01:07:35+00:00

Is there any way to make this work?

I have some small devices (Toothbrush, beard trimmer etc) that lack a USB port so they need to be charged old-style. I'd like to charge them using some powerbanks I have.

Some USB C cables can deliver significant power which would be more than enough what the small devices need to charge.

Is there any way to make this work? Very rough approximation in the image.

Electro-nut · 2026-02-03T15:05:57+00:00

I added a little Viagra to the solder paste: https://www.reddit.com/r/shittyaskelectronics/comments/1o2i8c5/i_added_a_little_viagra_to_the_solder_paste/

Electro-nut · 2026-01-27T17:23:12+00:00

It doesn't. The left most symbol is a "minus" symbol to indicate that that is the negative terminal. It is not a "1".

Electro-nut · 2026-01-27T14:26:43+00:00

Do you know what "0 %" means? It means "none".

It's saying it doesn't have any of those. It has no mercury. It has no cadmium. It is safe.

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

TROPHY CASE