How many different dialects of sign-language are there? And braille for the blind? Is it a different system for each language?

I know that there are several versions of sign languages out there for the deaf, hearing-impaired, and mute individuals (like we have American Sign Language — ASL:, which must mean we have other dialects of English Sign language, correct?), but how many languages of sign language do we actually have? I understand the need to have different signs for different letters in different languages that don’t use the same alphabet so that spellings can be different for their respective native tongue, but… is there an entire new system of sign language for each language?

I know nothing about braille, but was wondering how many different forms of braille there are? Since it’s reading letters… I imagine it would have a different system for each alphabet system, right? Or is it more complicated than that?

Please do enlighten me on this. I do feel very ignorant because even though I was born hearing-impaired and wore hearing aids my entire life and gone through speech therapy and had an interest in sign language… I never learned it.

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Question: Why is the world turning a blind eye to the racism towards the Roma Gypsies in Ukraine and to the persecution of them?

Question: Why is the world turning a blind eye to the racism towards the Roma Gypsies in Ukraine and to the persecution of them?

Question: Why is the world turning a blind eye to the racism towards the Roma Gypsies in Ukraine and to the persecution of them?

They are being attacked and in many cases killed by racist Ukrainian vigilante groups. While the Ukrainian government and the world community does nothing about it.

These attacks are happening all over Ukraine and they are not specific to one region. Why is no one putting a halt to these attacks?

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“The dawn rise behind the home for the blind.” [on hold]

Could you explain that please? The whole text is:

And you have never been in love until you’ve seen the dawn rise behind the home for the blind.

I don’t really understand it.

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“The dawn rise behind the home for the blind.”

Could you explain that please? The whole text is –> And you have never been in love until you’ve seen the dawn rise behind the home for the blind.

I don’t really understand it.

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How to replace a vertical blind clip?

I have a vertical blinds, but one of the blinds is missing and needs to be replaced. I have some pictures of it below. The problem is the plastic see through clip that is holding the blind. I don’t know where I would buy one. In the second image, it sort of has a circle shape but one side is cut almost like a half moon shape. Does anyone know where to buy it and the blind?

Preferably from known stores like blindstogo, or home depot/staples/home hardware, etc…

enter image description here
enter image description here

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Limited blind via pairs – Use for power or for signal?

I’m working on a PCB with 0.4mm WLCSP’s and 0201 discretes. It will have components on both sides. The routing is very tight; I can’t use a simple plated through hole (“PTH”) design.

I’d like to avoid the costs of sequential laminations. It looks like I can get away with six layers with a single-lamination design. This only gives me one set of blind vias and no buried vias. I’ve figured out fanouts that should allow for a mechanical drill (6-mil drill; 12-mil ring; filled via-in-pad).

Now I have to decide how to use my stackup. The board has RF at 2.4GHz and 3.5GHz. The transceivers will be very close to their respective antennas.

If I place ground and power planes on L2 and L5, I can use the blind vias for power, as shown:


In this case, one of the power connections will be a blind via and the other will be a PTH. All of my signal routing will have to be carried by PTH’s. This layout has a benefit of giving me a close reference plane to the RF on layer #1. It also shields the signal layers L3 and L4.

Or, if I put ground/power on L3 and L4, I can use the blind vias for signal routing:


In this case, I lose any low-inductance decoupling benefits of the blind vias. Also, my RF on layer #1 is now farther from a reference plane (I’d remove copper on L2 to make L3 the reference…)

The first case strikes me as better, but the second case will significantly simplify my routing.

Is there an obvious better choice here? What are the primary considerations?

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How do I fix a counterweighted accordion blind that is stuck?

We have accordion style blinds.
These are assisted…meaning that we can raise and lower the blinds just by lifting or pulling down. No need to pull any strings directly.

Now the assist mechanism is not working anymore. The mechanism is at the top of the blinds. mechanism

A string enters the mechanism from the right and the left.

I tried to pull on the string to see if I can get the mechanism to release/unwind the string but I had no luck.

Any suggestion from people that know this mechanism? How can I fix it?

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Why is it called “blind baking”?

This weekend I learned all about blind baking a pie crust on the Cooking SE site. They were stumped on why, exactly, it’s called “blind baking”, however.

For the uninitiated — the highlights of the Cooking answer:

Blind baking is indeed just baking without a filling — it can be fully or partially. Typically you do this because your filling will either need to bake for a shorter time than your crust (a quiche for example) or not at all (a pie filled with some kind of pre cooked/set custard). It can also be done to help ‘set’ a crust against a filling that will make it rather soggy.

I have no idea why it’s called blind baking, but the English.SE site is notoriously good at word origins.

Anyone have any theories or ideas?

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Legality of a DIY Arduino-based ultrasonic blind spot sensor in the US [closed]

I had an idea to build a small blind spot sensor similar to one at this link. Rather than using a laptop like the person in the link is using (obviously very illegal while driving), I would make a strip of four or so small hobby LED lights (like these), and attach them to the inside of my car, probably on each side of the radio dials (for my left and right blind spots). The four lights would be vertically stacked, and would light according to the severity of proximity (bottom one only for 3/4 of a lane away, all four for right against my side). The sensor itself would be the same kind of ultrasonic proximity sensor in the link, with an additional small chip, some resistors, and a small assembly (and maybe a case), and would be attached to the exterior of the vehicle on the side doors, and it would be wired to the inside of the car with a cord of 4 wires.

Does any of this sound illegal in the United States? Particularly the attachment to the side door, the wiring to the interior of the car, and the LED indicator by the radio controls.

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I have a sound project. For blind children ages 3-10 years to consult

I have a project for blind children 3-10 years old.
This project is about listening.
Because I have to provide information on various listening environment or other.
For example
As the blind child is about to cross the street.
And there came a car with a horn.
how Sound must be loud ???
Children should stop walking. For safety

So I want to use the principle of binuaral microphones.
Because the sound must be very real. In order to provide unbiased information.
If I use the 3dio mic to record the location. How realistic are they?

Is there any mic or recording principle? Can be used or modified to meet the teaching of these children.
Thank you

Ps. Sorry For My English Skill

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