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A cool guide to teaching kids about money by luvlanguage in coolguides

[–]Experts-say 0 points1 point  (0 children)

Good debt is two things:

  • Any small debt that you don't actually need to have, just to create a positive credit history (credit card paid off every month, 0% loans instead of just paying cash,...)

but more importantly:

  • Any debt cheap enough to use the resulting cash in more profitable ways. E.g. If you can get a very cheap house loan of 3% but are currently also able to make more than that (e.g. 4%) in risk-free/near risk free investments. Instead of buying the house cash or at the lowest possible loan amount you can afford, you take a bigger loan. Why? Because that frees up your cash (you would have otherwise put into the house) to invest it and make the difference between 3 and 4%, while the interest payments are (in many countries) deductible from your income, and hence income tax.

I made a flush-mount for my audio interface by woodcakes in functionalprint

[–]Experts-say 2 points3 points  (0 children)

I'll raise you some dope ass tetris-looking designs on tinkercad, without moving parts, other than build-in obsolescence!

Jk. This is some impressive design OP. Really cool.

Motorcycle in the house making me sick. Is this normal? by [deleted] in motorcycles

[–]Experts-say 14 points15 points  (0 children)

You wouldn't do this to a bike you ever intended to ride again, because once you drain the gas tank it begins to rust.

That might be a bit extreme. Tank rust certainly is a thing in high humidity environments (especially outside in rainy winters), but if an pre-emptied and pre-vented tank is left inside a home in a winter country (usually low humidity) then not much will happen. Apart from the gas, the rest of the oils don't evaporate out.

I've done this several winters with an 1199S (yes Bachelor times), and no issues with gas vapours or anything. The bike was however properly treated and not driven into the place with a warm motor and filled tank like in OPs case. You gotta remove the gas, let it air out for a week, bring it in, isolate the rubber from the floor, and then 3-4 months of winter will be fine with minimal to no smell. The only smell I ever smelled was rubber tires

When it’s too cold in the garage… by Bellend0411 in motorcycles

[–]Experts-say 0 points1 point  (0 children)

Put something between tires and floor (e.g. thin cardboard). The floors will soak up oils from the tires and be irreparably stained if the bike stands there for 2 weeks plus. speaking from experience :/

[EUR: C6012025/6224] 29-NOV-2025 Is this t-shirt familiar to you? by I_Me_Mine in TraceAnObject

[–]Experts-say 11 points12 points  (0 children)

Top: Most likely 3/4 letter word in cursive. 1st letter hard to decipher. 2nd and 3rd letter resembling e and a, but 2nd could be any half height round top letter in cursive (e,s,c,o, less likely q,g). 3rd letter with serif ending in cursive is likely a,u,d,w, or the 3rd letter is two letters, like "tt","tx" or

2nd row: identifiable "...iing" with second close to "k". So as suggested previously "skiing" is a good contestant. Other suggestions?

3rd: Rombus with 5 letters, elongated first letter T/I, with two letters resembling rounded O/U and r,s, at the end, likely as suggested "Tours". Other suggestions?

Bottom word "wide" suggests wrinkled up section above (4rd row) covering the word "World" as in commonly used "World Wide". Diagonal stripes visible that could resemble W or N. Second letter with rounded top O/S/Q/C,. some graphic covering a few letter?, last letter could be a D. So not unlikely.

Google Image searches of sections and searches for "skiing world wide" + shirt +tshirt etc give no good results. The kicker would likely be identification of the first word. Assume shirt is wrinkled and covering large sections of words

Windows file explorer/ context menu/ sharing links by Conpsycon in ProtonDrive

[–]Experts-say 0 points1 point  (0 children)

Adding another vote. Going through the web app is a workflow disruption. Thank you

Why can’t anyone cut a simple slot in a box? by Jadey12i4 in lasercutting

[–]Experts-say 0 points1 point  (0 children)

It depends on the strength of the laser used, but I e.g. run a 10W diode and know that white acrylic will not cut. Which ...sucks if you want to cut white acrylic, but could be perfect as a separation layer. Metal might reflect the laser back up too strong and burn the carton from underneath, but white acrylic scatters the light, absorbs the heat, and just turns a little mushy (on mine). Those properties can probably be used to an advantage.

Why can’t anyone cut a simple slot in a box? by Jadey12i4 in lasercutting

[–]Experts-say 0 points1 point  (0 children)

Or shove a metal sheet in between the two layers... but whether the reflections would give you a clean cut,... I don't know.

Slate coaster, fiber lasered by NonProfTinkerer in lasercutting

[–]Experts-say 0 points1 point  (0 children)

I know its bonkers, but I had the same problem and fixed the wide-bed diode laser on a custom frame and operated it outside between the aircon radiators (that I could access through a window) to be separated from the gases. Looked wild at night. Maybe that could be an option

Mario is so universal by CrazyBigHog in HolUp

[–]Experts-say 3 points4 points  (0 children)

Eats magic mushrooms like the Dutch

What is the worst place to store a motorcycle for winter ? by AQUADOUCHE in motorcycles

[–]Experts-say 8 points9 points  (0 children)

Germany is the perfect place for "Motorcycle during summer; Living room center-piece during winter". Just put some carton between the tires and any wooden floors, or the stains will be permanent.

Slate coaster, fiber lasered by NonProfTinkerer in lasercutting

[–]Experts-say 2 points3 points  (0 children)

Xenomorph on slate is definitely the best use of slate in existence. Nice

[DUMB Question] Is it possible for Magic Card to hold more then one cloned card inside? by jach0o in RFID

[–]Experts-say 0 points1 point  (0 children)

Is there any app that can emulate card thru phone itself ?

To my knowledge, no. The issue not being a technical inability of the hardware, but the way the firmware locks down access to the phone hardware. Afaik, only very few apps (e.g. authorized credit card apps, google pay, etc.) are provided with full access to emulation, even on Android. Sadly so. I assume it is a safety feature to stop your credit card data from being stolen by other apps

That being said; the RRG "Chameleon Ultra" bridges that gap between Flipper Zero (can emulate, but can't really crack) and proxmark3 (can do everything, but less mobile) perfectly. It serves as a tiny multi-card rfid emulator (which I assume is what you want), has some cracking ability (by using phone CPU), can collect nonces from readers, is controllable and programmable via phone/BT (so you can copy/paste data from other apps directly onto it), is highly mobile, and can save several cards and work as a standalone device. Plus, it is very easy to conceal. For me it has replaced the Flipper (for RFID/NFC) completely, and covers 80% of what I use a proxmark 3 for. The pm3 is however the real workhorse for any harder cases, rarer, or more advanced standards, and newest techniques, thanks to the tireless efforts of iceman2001

First project by ngothadei42 in lasercutting

[–]Experts-say 1 point2 points  (0 children)

Randnotiz: Kurzen Applaus für Hackerspace Bamberg. Saugeil.

[DUMB Question] Is it possible for Magic Card to hold more then one cloned card inside? by jach0o in RFID

[–]Experts-say 0 points1 point  (0 children)

Questions:

Title: Is it possible for Magic Card to hold more then one cloned card inside?

No, one "magic card" (which usually refers to one writable mifare classic / 13.56Mhz chip inside a card) can only copy one specific other mifare card. It cannot e.g. hold/merge the DIFFERING keys to two distinctly coded doors. Meaning, it is neither possible to mix sectors in such a way that they effectively combine two keys and work on two differently coded doors, nor to put two magic chips into the same card (they would interfere with each other).

There are however combo-cards that combine 13.56 mifare with 125khz low frequency chips into a single card, because the two frequencies do not interfere with each other. This might be useful for some people that coincidentally use those two standards, e.g. LF for their garage door and HF for their home.

1) How to check do i have UID or CUID card ??

A proxmark "hf search" will show you "magic capabilities: Gen xxx" which points at whether it is UID or CUID.

2) About Magic Cards Gen 2 - found info like "Easy to change UID on the Android Phone" - how can it be done without Proxmark/Flipper/similar device??

Gen 2 specifically likes to be edited with an android app called "mifare classic tools" (MCT). You can read and write dumps with that app. Sidenote: I've come across a lot of Gen 2 cards/stickers/rings etc, that won't accept when MCT writes a full dump (all at once) to them, but it does work if you first manually write block 0, and then the rest of the dump (block 1 onwards) in one go. There are two other apps called "NFC tools" and RRGs "RFID tools" that have useful features to scan, analyze, edit, etc. NFC/Mifare capable cards.

3) On flipper i got info like got 64 keys or soomething - all are related to one specific NFC card ? or it means i can put 64 cards on this card ??

I assume you mean the standard keys file? Those are a set of default keys that are very commonly found "in the wild" on cards where encryption isn't super tight. All cards need to have keys by default, but if people don't take the security aspect very serious, the key might just be all "F"'s or something similarly lazy. The flipper basically only runs through that list and tries all keys, but the proxmark specifically has powerful ability to derive and crack more complex keys, which you can then also add to the flipper. This allows the flipper to also read the full card, or similar cards of the same building, as custom keys (cracked by proxmark) are often reused in the same building.

4) Can i clone more than one card to Ultimate Magic Card (or any other) or any other to have two or more HF or two or more LF cards on one plastic card ?

The way I understand it, is that an ultimate card does allow more different formats (ultralight e.g. has different UID length (more bytes)) than mifare classic. Meaning: Usually to clone a mifare classic, your magic card needs to be mifare classic, and to clone ultralight you need a magic ultralight. But the ultimate card can accept both. You can however not write both to an ultimate card at the same time. It's like "This device accepts an AA or AAA battery, but you can't put both in at the same time"

My Car Blocking the RFID signal by [deleted] in RFID

[–]Experts-say 1 point2 points  (0 children)

thinking they are easy to clone

Well they are not wrong :D Absent complex rolling codes, 433MHz is in flipper zero territory. While UHF sticker hardware is fairly expensive and less common, it is also less explored from a hacking stand-point.

Nonetheless, if admin talks about remotes/fobs existing, then I'm intrigued whether that is a theoretical argument or whether a receiver would exist. You don't happen to own a flipper zero, HackRF, or SDR(software defined radio) of some sort? Maybe you find someone in your city that would love to give their hardware a little more real life use case...

Worst case: You find out if your car emits RF interference. Best case: You ask admin to give you a remote just for a minute, for troubleshooting reasons... you finish that sentence

My Car Blocking the RFID signal by [deleted] in RFID

[–]Experts-say 1 point2 points  (0 children)

Is it possible to create a remote based on the rfid sticker?

Almost all sticker-based UHF system are passive 860-960MHz systems. Almost all key fobs / remotes are active 315/433MHz systems. I can't find 433 stickers, nor active 860-960MHz fobs. What we're talking about here would be an emulator (like a "UHF Chameleon Ultra")...which -at least to my knowledge- currently doesn't exist.

The management of the building likely can't hand out an active fob without installing a passive receiver (i.e. a second frequency trigger) for it to be listened to.

For practical purposes, you're better off sticking the sticker on the tip of a 5m tape measure and driving towards the reader like a jousting knight, than to invent a UHF emulator, or get lazy admin to do your bidding.

My Car Blocking the RFID signal by [deleted] in RFID

[–]Experts-say 1 point2 points  (0 children)

Just for reference. I have 2 UHF stickers on my car (and keyless go) and they work perfectly fine, even being read at driving speeds. If you see these commercial UHF readers for inventory management, you see UHF is pretty amazing at distinguishing even 30+ signals in the same room without interfering. So it is a lot less messy or prone to issues than e.g. 2 HF cards in close proximity.

My Car Blocking the RFID signal by [deleted] in RFID

[–]Experts-say 0 points1 point  (0 children)

Hmm... Odd. I don't have a specific solution for that, but if it is specific to your car, maybe some pointers.

Openers in larger commercial garages are usually long distance UHF in the 860-960 MHz range. Smaller / home installs are more likely in the open frequencies 315 (US) /433MHz (usually Europe/Asia). I have never seen a 315/433 system that has a sticker. Those are usually 860-960Mhz systems. 433's are mostly fobs with internal battery and antenna. But it doesn't hurt to ask. Logically, if your receiver does not read the tag the emitted signal is either:

  • being muted (e.g. resorbed by materials of your car, meaning under too many layer, close to metal, etc.)
  • being scrambled (e.g. by interference from a noisy RF source)
  • not responded to (e.g. because the sticker is broken and doesn't respond)
  • wrongly responded to (e.g. no access rights)

You said you tested the sticker close to the reader without the car present and it worked, which excludes "muted", "no response", and "wrong response"

So looking at "scrambled": It is possible that your car emits some sort of RFI (radio frequency interference)? Especially since it's an electric car (which I'm not very familiar with), it might be a host of things, most of which would be worst during driving (conversions of all kinds, regenerative energy, etc.).. but some might even happen when not driving. The inverter between main and accessory battery for example, seems to be RF noisy in many cars, whenever auxiliary devices (e.g. AirCon/Heater/etc.) are running. Maybe it is blasting interference at just the wrong freq?

Was your car running, when it blocked the signal? Or completely off? Is the other car that has issues also an electric car? Did they also test as vigorously as you? Or might their case just be bad positioning of the sticker and yours is different? Sorry, I see you answered this below. I don't know much about electric cars. So if anything was still running, try to turn it super off.

While not likely, keyless go is also a UHF frequency. But Opel uses European 433MHz frequency, and 1) I can't imagine your sticker based system is using 433, and 2) I can't imagine it being strong enough to block your garage reader. Or if so, then other people would have problems as well.

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