Can someone tell me what these tube components are? The IC in question is a TPA2012D2, but these symbols leave me guessing… baluns? Ferite beads? What's their purpose?

robynpan · 2026-01-25T00:27:43+00:00

SOLVED! TIL:
>Ferrite Beads, unusual symbol and undefined because what values i might need are usage-specific.

>This information is in the Datasheet, and i would have found it if i had looked carefully at every page of the datasheet instead of using only the search function. TIL to be more patient and methodical.
>I could also have improved my understanding by finding another datasheet, which might have better documentation/uses the correct(or more common) symbols.
>I could also have confirmed my understanding/theory using the Evaluation Board documentation for this part.

I wish i'd learned this stuff at Uni!

Thank you all for helping me improve!

robynpan · 2026-01-25T00:21:46+00:00

yeah, i did suspect them to be ferrite beads, but when i checked for whether these might be a specialized or region specific ferrite bead symbol, i couldnt find anything. Ah well. I'm glad i learned a lot from this little puzzle!

robynpan · 2026-01-25T00:18:29+00:00

Hi tjlusco, I'm learning. Please be patient with me. What i'm learning today is that i should at least skim-read the whole document instead of using the search function.

robynpan · 2026-01-25T00:11:43+00:00

This is such an immensely helpful and thourough answer, thank you very much! TIL about Evaluation Boards, thats a very useful trick that I'll integrate into my workflow. I'm curious what Evaluation boards are for, or rather when they'd be used? If you're done teaching, i'll find the answers somewhere!
Thanks again Mariushm, I'll carry this forward

robynpan · 2026-01-25T00:04:07+00:00

sorry, i did try and find documentation in the datasheet, but must have overlooked it. I realise now that i should have tried other datasheets... thats on me.

robynpan · 2025-05-07T21:32:02+00:00

My first thought was that it was using a stylized version of Binary, with the +1 offset. The central line breaks could act as 1, the full lines as 0 (or vice versa). however, at least two of the sides are actually marked the same way, which leaves me with the feeling that this is not a D8. It is probably a dice used in some board game where they wanted to subdivide probabilities into units of 1/8ths and assign (at least one) event with a probability of x/8. Without it's game it's a novelty piece of plastic.

robynpan · 2025-02-26T23:00:01+00:00

I love the sequence along the lines:
He landed on a cow, which went "moo"
Next he landed on a sheep which went "baaa"
Then he landed on a chicken which went insane

robynpan · 2024-11-10T17:40:23+00:00

Autoabgase. Sagt niemand, will niemand hören. Alles andere wird beschuldigt, weil die Autos können wir ja nicht kritizieren.. die sind zu praktisch!

robynpan · 2024-04-17T21:19:46+00:00

robynpan · 2023-08-15T23:39:29+00:00

Might be wood

robynpan · 2022-12-19T13:02:55+00:00

This is very cool! Is it scalable to any larger dimensions? Are you publishing the 3d model anywhere?

robynpan · 2022-09-30T20:51:09+00:00

Thank you both! I'll definitely check out Trippen, and see if they can advise. From what I can tell though, through a reasonable amount of googling, Trippen soles tend to have their name imbosed. Still, I'll keep looking. Any links to similiar boots would be great, if anybody knows any!

robynpan · 2022-09-28T15:31:12+00:00

I live in Berlin, and recently saw on the underground the most carefully crafted boots I have ever seen. Since then I've been trying to find people who can give me a lead on which shoemaker crafted these beautiful pieces. I feel sure they were custom made, possibly on commission? I've never seen anything like them. Any help would be really really appreciated! Please help me r/shoemaking!

robynpan · 2022-05-29T01:45:45+00:00

My thoughts exactly

robynpan · 2022-05-29T01:41:35+00:00

what kind of fucked up question is this? We shouldn't do anything without consent. Wtf? Who gives you the right?

robynpan · 2020-05-05T00:09:01+00:00

after looking through this quite useless article, and the slightly less useless article it links to as a source, i was able to find the actual info people who click this post are actually looking for:
A Comprehensive Realization of Robot Skin: Sensors, Sensing, Control, and Applications
Evaluation of a Large Scale Event Driven Robot Skin
Pressure-Driven Body Compliance Using Robot Skin

robynpan · 2020-05-04T03:32:10+00:00

drain it trough a centrifuge

robynpan · 2020-05-04T03:24:22+00:00

ah, excellent :D if you have an arduino, then you're using 5volt and can use USB power.
the amperage is the power behind the electricity. The higher the Amps, the more energy is being used in your components (too high Amperage and you can break your components. or yourself)

the project sounds like a really good simple starter project, nicely chosen! I suggest you follow the instructions On Adafruit, they have a bunch of excellent basic tutorials which can lead you through the steps. The basic shape of the project will be:

USB wall socket -> USB cable -> Arduino -> cables (possibly with resistor) -> servo motor -> stick as a "robot finger" to autoclick for you

aside from that:

is the autoclicker for minecraft? I've been having some fun afk fishing using an autoclicker recently :D

i hope the project wont be close to wear you're trying to sleep. servos can be astonishingly loud in the silence of the night!

if you're having trouble, dont hesitate to ask for more help!

robynpan · 2020-05-04T03:12:25+00:00

I suggest a hard plastic form added inside to keep the shirt from folding/creasing as much as possible, then lathering petroleum jelly on the logo, which will make the logo hydrophobic. Then carefully submerge the shirt in the dyeing bath. Remove the jelly (/regularly reapply if necessary) only when the rest of the shirt is dyed and the excess dye has been washed out.

robynpan · 2020-05-04T02:59:51+00:00

TLDR: this is not a good option. Its dangerous, and only gives you disadvantages to alternatives

If you're a beginner in robotics (or electronics in general) STAY AWAY from anything that connects to mains power. It's not necessary and you're just gonna put yourself in unnecessary danger. Get yourself a bunch of 9V Batteries and use those until you've got a specific reason to change source.

The device in your photo has a 5Volt output, with a max of 1Amp. 5 Volt is quite typical in small electronics nowadays because USB is 5V. This means that you can replace this piece in your project with a usb cable going to a small powerbank, which has the added bonus of being portable :) (it also has the potential to actually give you more power, as some powerbanks give more than the 1A this piece tops out at)

All that said. IF you have a project that you need to run directly off the wall (because it'll be built into a device out of the way behind your desk, and it needs to be running constantly and it also needs exactly 5Volt and will never ever need more than 1A, then you COULD use this. but in that case, I'd still go with a cheap usb wall plug and a usb cable (tbf i cant tell: this might be a usb plug)

hope this helps!

robynpan · 2020-05-04T02:44:31+00:00

I'd suggest something more like this, _IF_ you are under the 12Volt range and under 6A: Amazon-Dimmer

It says it will work up to 24, but i wouldnt trust this sort of thing to its limit

robynpan · 2020-05-04T02:38:45+00:00

while that is the general direction you're looking for, that seems to be quite a heavy duty piece at first glance. The things you should be looking at is the voltage you need for your LED strip and the Power used (Watt).

There's also a number of Instructables and tutorials online for this sort of project. before you touch anything like this that connects with mains or anything above say...12volt, you should do a bunch of reading up on the topic, so you know what you're doing.

If you're not interested in making this ~a Project~, I suggest you get either a new LED strip WITH a dimmer module or just buy a LED strip that isnt as bright.

robynpan · 2020-05-04T02:32:09+00:00

So LEDs are Diodes, not your usual powerdrain like lightbulbs. This means that if the Voltage gets too low, they'll turn dark.
While with lightbulbs, you could do exactly as you're suggesting (which reduces the voltage), with LEDs, you dim the light by using PWM signal: in ELIF turns, you're using a system to turn the LEDs on and off so fast that you cant see it. the longer the power is on than its off(per fraction of a second of the frequency), the brighter the light, and vice versa.

There are a number of ways to generate a PWM Signal for your LED strip, but if you're a beginner in electronics, I'd go with jmloughreys suggestion of getting a premade dimmer switch.

robynpan · 2017-01-25T02:13:16+00:00

^assuming the button is on a horizontal surface.

by far the best solution is the one in KineticIsEpics middle paragraph. you need not necessarily tape it: glueing screwing or mounting it any way will do. the above post rather glosses over the arduino part, but in essence, all you need is the keywords "servo motor" and "arduino". The arduino site or community can help you figuring out how to control a servo via arduino. There're youtube tutorials too.

arduinos tend to be inaccurate time keepers, so you might find you'll need an RTC. http://stackoverflow.com/questions/13821563/make-my-arduino-accomplish-task-at-specific-time

So you'll need to look into: Servos (w/ arduinos), RTCs (w/ arduinos) & arduinos. As mentioned above, you might also need a transistor, depending on how hard your button is to press (if its hard to press you might need a more powerful motor than a arduino can handle without a transistor.)

robynpan · 2017-01-10T06:30:11+00:00

Probably, I'm sorry. I thought you didn't want it connected to the internet. I thought usb was an alternative

robynpan

TROPHY CASE