.-=Encaps=-.: 2021

2021-09-24

AWS essentials 3 - python lambda

File upload:

https://gist.github.com/tomfa/87947d2773b60fc3797491d6ef5e3d0e

python vs java speed

https://gist.github.com/badrhub/49b722cf1fb63157cf4d298c48446b38

https://gist.github.com/badrhub/f53ba74e4ad31e4b72b369de93d936ab

2021-09-21

Kstar

"День онлайн" за 15 грн- 1000 мб або за 30 грн-4000 мб на день.

Послуга «День Онлайн 1000 Мб»: *263*1#, «День Онлайн 4000 Мб»: *273*1#.

проверка остатка *263#

2021-09-05

CPU comparizon

CPU/ranking	TestSin	AllCombi
I3-10100F 453	46/70
M1 Pro 453	70/32 ??? 30/30
Core i7-9750H 748	46	68
Core i5 1135G7 808	33	36
Core i7-10510U 1096	50
Ryzen 3 2200G windows 1098	18	29
Core I5-8250U 1179	W:38 L:19	W:44 L:50
Core i7-2600 1270	W:14/15
Core i5-3550s 1372	W:15/16
AMD Athlon-3000G 1374	W:17 L:19/20	W:25
Core i5-6300U 1603	10
Core i5-4210M 1691	W:26 L:20	W:47 L:45

2021-08-22

Прототип мотор-колеса

оригиналы https://vi.aliexpress.com/store/all-wholesale-products/2383059.html?spm=a2g0o.store_pc_home.pcShopHead_8522459.1

IRF3205 N-канал, 110A, 55V, 0,008om

IRFB3207Z N-канал, 170(75)A, 75V, 0,004om. TO-220.

IRF3808 N-канал, 140(120)A, 75V, 0,007om. TO-220.

===

IRFZ48N N-канал, 64A, 55V, 0,014om

IRLZ44N N-канал, 47A, 55V, 0,022om, логический уровень управле

(IRLB3034 )

IRLZ24N N-канал, 18A, 55V, 0,06om, логический уровень управления
IRFP250N N-канал, 30A, 200V, 0.075om, TO-247AC
IRFP064N N-канал, 110A, 55V, 0.08om, TO-247AC

IRF640N N-канал, 18A, 200V, 0.15 om
IRF530 0,16 om

Hall sensor - 49Е

https://youtu.be/VbEf4tcJ8MU

---------------------------------

Крутящий момент 25Н*м = 800Вт

ток 2А, напряжение 3.7В,

10 витков = 20гр

40 вит = 80гр

attachInterrupt()

-----------------------------

Вес медного провода: площадь сечения * плотность = г/м

толщина: 0.35 , сечение= п * r2 = 0.38, вес=0.38 * 8.9 =3.5 г/м

-----------------------------

Ток и толщина провода:
1А - 0.05мм, 3А -0.11мм, 10А-0.25мм, 15А-0.33мм, 20А-0.4мм, 30А-0.52мм, 40А-0.63мм, 50А-0.73мм, 60А-0.89мм,70А-0.92мм, 80А-1.00мм, 90А-1.08мм, 100А -1.16мм

Таблица нагрузки проводов и кабелей

Сечение, мм²	Открыто проложенный
	Медь			Алюминий
	Iₙ, А	кВт		Iₙ, А	кВт
	Iₙ, А	220В	380В	Iₙ, А	220В	380В
			-	-	-	-
0,2 диам 0.5	3?		-	-	-	-
0,28 диам 0.6			-	-	-	-
0,5 диам 0.8	11	2,4	-	-	-	-
0,75 д0.98	15	3,3	-	-	-	-
1 д1,12	17	3,7	11	-	-	-
1,5	23	5	15	-	-	-
2,5	30	6,6	19	24	5,3	15,5
4	41	9	26	32	7	20,7
6	50	11	32	39	8,6	25,2
10	80	17,6	52	60	13	38,8
16	100	22	65	75	16,5	48,5
25	140	30,8	90	105	23,1	58,1
35	170	37	110	130	28,6	71

Сечение, мм²	Проложенный в трубе
	Медь			Алюминий
	Iₙ, А	кВт		Iₙ, А	кВт
	Iₙ, А	220В	380В	Iₙ, А	220В	380В
0,5	-	-	-	-	-	-
0,75	-	-	-	-	-	-
1	14	3	9	-	-	-
1,5	15	3,3	9,7	-	-	-
2,5	21	4,6	13,6	16	3,5	10,3
4	27	5,9	17,4	21	4,6	13,6
6	34	7,5	22	26	5,7	16,8
10	50	11	32,3	28	8,3	24,5
16	80	17,6	51,7	55	12,1	35,5
25	100	22	64,6	65	14,3	42
35	135	29,7	87,2	75	16,5	48,5

Если бытовая розетка выдерживает до 16А, к ней необходимо подводить провод на 1,5 мм², но для защиты нужно поставить автомат на 16А или ниже. Подробнее https://axiomplus.com.ua/news/raschet-i-vybor-secheniya-provoda/

Эмалевые провода обладают также высокой термостойкостью, и способны выдерживать температуру до 155°С.

https://electrosam.ru/glavnaja/slabotochnye-seti/provoda/obmotochnye-provoda/

https://hackaday.com/2023/06/28/you-can-3d-print-a-12500-rpm-brushless-motor/

https://www.youtube.com/watch?v=gBPZYLpVtj4

https://rcopen.com/blogs/108033/15455 Схемы намотки бесколлекторных двигателей

провод

0.5 55м 100гр

0.4 86м

рабочий ток

10А на 1 кв мм сечения, то есть 2.5А для 0.5мм ?

1 катушка

30мм диаметр, 10мм высота, средняя длина витка 6см, 400 витков 0.5 = 24м (50гр), сопротивление 2Ома, для тока 2.5А напряжение 5Вольт.

https://www.hornbach.sk/p/viecko-5301-12-mm-med/5105088/

https://www.hornbach.sk/p/medena-rurka-makka-o-10-mm-hrubka-steny-1mm-navin-50-m/10457320/

https://www.hornbach.sk/p/medena-trubka-makka-o-8-mm-hrubka-steny-1mm-navin-50-m/10457322/

https://www.hornbach.sk/c/naradie-stroje-a-dielna/naradie/rezacky/rezacky-trubiek-rezacky-na-kov/S24538/

сдвинуть тележку с места, достаточно:

350gr/10gr = 1/35

500гр/5гр = 1/33

700гр/30гр = 1/23

8Ватт ~ 40гр брашлес мотор с винтом

Rb = (45)

Rm = Rb - r

Rm = L/2п = 8*2r/2п =8r/п

Rb - r = 8r/п

Rb = 8r/п + r = r(8/п+1)

r = Rb / (8/п+1)

r = 25, Rb = 44.33

https://www.youtube.com/watch?v=8D1v7n3As-E&t=12s

Как изменить частоту электросети? ЧАСТОТНЫЙ ПРЕОБРАЗОВАТЕЛЬ

https://youtu.be/8D1v7n3As-E?t=282

AutoCAD

Catia

Creo

Inventor

Onshape

Rhino

SketchUp

SolidWorks

SpaceClaim

TinkerCAD

Other

прошивка ESC

https://www.youtube.com/watch?v=lxhfmXkZ9mU

https://www.youtube.com/watch?v=_AUui1qNYqs

2021-08-17

Linux setup

Python:

Can't create virtual environment from PyCharm in Ubuntu :

sudo apt-get install python3-virtualenv

sudo apt install -y libbz2-dev libffi-dev libssl-dev

134 sudo apt-get install pkg-config

138 sudo apt-get install g++

139 make clean

140 ./configure --enable-optimizations

141 make && make test && sudo make install

142 pip3 install pyautogui

git:

https://docs.github.com/en/github/authenticating-to-github/connecting-to-github-with-ssh/generating-a-new-ssh-key-and-adding-it-to-the-ssh-agent

ssh-keygen -t ed25519 -C "your_email@example.com"

ssh-add ~/.ssh/id_ed25519

https://docs.github.com/en/github/authenticating-to-github/connecting-to-github-with-ssh/adding-a-new-ssh-key-to-your-github-account

$ sudo apt-get update
$ sudo apt-get install xclip
$ xclip -selection clipboard < ~/.ssh/id_ed25519.pub

arduino:

avrdude: ser_open(): can't open device "/dev/ttyUSB0": Permission denied

sudo usermod -a -G dialout <username>

https://my.canon/en/support/0100588102

http://localhost:631/printers/

2021-06-13

AWS essentials - 2 - try Java SDK - S3 example

1. Set up env (this step is done before)

https://docs.aws.amazon.com/sdk-for-java/latest/developer-guide/get-started.html

2. Get the code from ASW Java SDK

2.1. Set up pom.xml

(waiting for IntelliJ finished it's background tasks,indexing etc)

(I'd use Java 11, not 1.7)

(dealing with duplicates in pom.xml - "build" section)

ok, the issue is fixed - it's time to run the code

find AWS SDK for Java 2.0 documentation examples

(fixing missing imports: org.apache.logging.log4j.Logger;TestInstance)

Looks like all the issues are fixed - time to run the test - confirm S3 bucket is created

the bucket is created - bucket-name-2021-06-13, it is empty now - let's upload a file - it says "Test 3 passed" - let's see AWS S3 contents - looks good: the file asdf.txt is copied to S3 as "asdf.in.s3.txt"

2021-06-09

AWS essentials - Step 1 - Create AIM admin user

1. Create IAM user (we should not use AWS Root account for programmatic access to AWS - we will create corresponding IAM user instead)

2. Install AWS CLI - Command Line Interface

for Linux:

https://docs.aws.amazon.com/cli/latest/userguide/install-cliv2-linux.html#cliv2-linux-install

for Windows:

https://docs.aws.amazon.com/cli/latest/userguide/install-cliv2-windows.html#cliv2-windows-install

3. Set up AWS credentials

you may use default (us-east-1) region. I will use eu-central-1 for now.

4. Make sure your user is able to connect AWS resources - for example, let's examine S3 access

$ aws s3 mb s3://bucket-name-2021-06-09

and from AWS UI we see the bucket is created: bucket-name-2021-06-09

So, first step is done - we've created IAM user and confirmed it has access to AWS

SIMPLE MONTHLY CALCULATOR:

https://calculator.s3.amazonaws.com/index.html

A newer version of the S3 calculator is available

https://docs.aws.amazon.com/sdk-for-java/latest/developer-guide/home.html

AWS Code Sample:

https://docs.aws.amazon.com/code-samples/latest/catalog/code-catalog-javav2-example_code-ses.html

https://github.com/awsdocs/aws-doc-sdk-examples/tree/master/javav2/example_code/ses

AWS SDK for Java, version 2:

https://docs.aws.amazon.com/sdk-for-java/index.html

2021-05-08

Простой надежный прерыватель указателя поворотов

Не претендую на оригинальность решения, если где-то кто-то раньше опубликовал подобное - пишите, добавлю ссылку в описании

2021-03-11

AWS

aws lambda invoke --function-name=<fn> --region=us-west-1 out.txt

asw s3 ls

awsconsole > my security credentials > Access keys
aws configure

aws ec2 describe-regions

aws s3 mb s3://asfg

aws s3 sync s3://asdf --delete

aws s3 cp /path/to/file s3://sample_bucket --acl public-read

    final static String ACCESS_KEY = "";
    final static String SECRET_KEY = "";
    final static Regions REGION = Regions.EU_CENTRAL_1;
    

//        final AmazonS3 s3 = AmazonS3ClientBuilder.defaultClient();
        final AmazonS3 s3 = AmazonS3ClientBuilder.standard()
                .withCredentials(new AWSStaticCredentialsProvider(new BasicAWSCredentials(ACCESS_KEY, SECRET_KEY)))
                .withRegion(REGION)
                .build();
        List<Bucket> list = s3.listBuckets();

2021-02-26

Windows cleanup

win+r disk cleanup

win+r %temp%

Select the Start button, then select Settings > Apps > Startup.

Ubuntu autorun

alt+F2 gnome-session-properties

gnome-startup-applications

2021-02-24

AWS

SIMPLE MONTHLY CALCULATOR
https://calculator.s3.amazonaws.com/index.html

AWS Free Tier
https://aws.amazon.com/free/?nc2=smc&all-free-tier.sort-by=item.additionalFields.SortRank&all-free-tier.sort-order=asc&awsf.Free%20Tier%20Categories=categories%23databases

aws configure

aws dynamodb describe-table --table-name BaseballStats

aws dynamodb batch-write-item --request-items file://./teams.json

aws dynamodb scan --return-consumed-capacity "TOTAL" --table-name BaseballStats

aws ec2 describe-instances --profile prod-user

AWS credentials provider chain that looks for credentials in this order:

Environment Variables - AWS_ACCESS_KEY_ID and AWS_SECRET_ACCESS_KEY (RECOMMENDED since they are recognized by all the AWS SDKs and CLI except for .NET), or AWS_ACCESS_KEY and AWS_SECRET_KEY (only recognized by Java SDK)
Java System Properties - aws.accessKeyId and aws.secretKey
Web Identity Token credentials from the environment or container
Credential profiles file at the default location (~/.aws/credentials) shared by all AWS SDKs and the AWS CLI
Credentials delivered through the Amazon EC2 container service if AWS_CONTAINER_CREDENTIALS_RELATIVE_URI" environment variable is set and security manager has permission to access the variable,
Instance profile credentials delivered through the Amazon EC2 metadata service

Credential retrieval order

sudo yum remove java-1.6.

sudo yum install java-1.8.0-openjdk-devel

sudo alternatives --config java

sudo yum install apache-maven

mvn -v

export JAVA_HOME=

mvn -v

aws sr mb s3://asdf.com

aws s3 ls s3://asdf.com

./mvnw clean install

maven reload all projects

./mvnw clean verify

2021-01-14

RESTfull API

REST API Architectural Constraints:

A Restful system consists of a:

client who requests for the resources.
server who has the resources.

Architectural Constraints of RESTful API:

Uniform Interface
Stateless
Cacheable
Client-Server
Layered System
Code on Demand

RESTfull = REST over HTTP

GET	200 OK	404 Not Found
POST	201 Created	404 Not Found 401 Unauthoriized 409 Conflict
PUT PATCH	200 OK	404 Not Found 401 Unauthoriized 405 Method Not Allowed
DELETE	200 OK	404 Not Found 401 Unauthoriized
OPTIONS	200 OK
HEAD	200 OK	404 Not Found

Response code:
1xx Information
2xx Success
3xx Redirect
4xx Client error
   400 - Bad request
   401 - Unauthorized
   403 - Forbidden
   404 - Not found
   405 - Method not allowed
5xx Server error

https://restcountries.com/#endpoints-all

.-=Encaps=-.