morse | Code to convert a physical morse key into a USB keyboard | Keyboard library
kandi X-RAY | morse Summary
kandi X-RAY | morse Summary
This repo contains code to convert a physical Morse key into a USB keyboard, via a Teensy 3.2. This means you can plug the Morse key into any laptop or computer and use it in exactly the same way as a conventional keyboard, except you type in Morse and the characters appear on screen in English. The keyboard currently supports lowercase letters of the alphabet from a-z and numbers 0-9. Unrecognised characters are printed out as a dash, or "-". Timings between characters and words are currently hardcoded in ms. This isn't hugely accurate since different operators will key at different speeds, but the hardcoded timings can easily be tweaked. You'll need a Teensy 3.2 and a physical Morse key. I've configured my Teensy so one output from the Morse key is connected to Pin 7, and the other is connected to a ground pin.
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QUESTION
I would like to pass data (which is saved as a state) to a react component that graphs that data. That graph should also be able to filter the data.
The data is a nested object structured as follows.
...ANSWER
Answered 2021-Jun-11 at 19:43Primitives, such as integers or Strings are passed down by their value, while Object data-types such as arrays are passed down by their reference.
Here in your example - data
is by passed reference. which makes it mutable.
In React - props should be immutable and top-down. This means that a parent can send whatever prop values it likes to a child, but the child cannot modify its own props. From ReactJS documentation
Whether you declare a component as a function or a class, it must never modify its own props.
One solution is is to pass a copy of your original data
object.
Updated Codepen. You're still mutating props - not a good idea but it works.
Edit: JSON.stringify
is NOT recommended due to it's issues with dates & non-primitive data types. Other ways to deep clone in JS -
How to Deep clone in javascript
QUESTION
I am currently trying to make a .wav file that will play sos in morse.
The way I went about this is: I have a byte array that contains one wave of a beep. I then repeated that until I had the desired length. After that I inserted those bytes into a new array and put bytes containing 00 (in hexadecimal) to separate the beeps.
If I add 1 beep to a WAVE file, it creates the file correctly (i.e. I get a beep of the desired length). Here is a picture of the waves zoomed in (I opened the file in Audacity): And here is a picture of the entire wave part:
The problem now is that when I add a second beep, the second one becomes completely distorted: So this is what the entire file looks like now:
If I add another beep, it will be the correct beep again, If I add yet another beep it's going to be distorted again, etc. So basically, every other wave is distorted.
Does anyone know why this happens?
Here is a link to a .txt file I generated containing the the audio data of the wave file I created: byteTest19.txt
And here is a lint to a .txt file that I generated using file format.info that is a hexadecimal representation of the bytes in the .wav file I generated containing 5 beeps (with two of them, the even beeps being distorted): test3.txt
You can tell when a new beep starts because it is preceded by a lot of 00's.
As far as I can see, the bytes of the second beep does not differ from the first one, which is why I am asking this question.
If anyone knows why this happens, please help me. If you need more information, don't hesitate to ask. I hope I explained well what I'm doing, if not, that's my bad.
EDIT Here is my code:
...ANSWER
Answered 2021-Jun-04 at 09:07The problem
Your .wav file is Signed 16 bit Little Endian, Rate 44100 Hz, Mono
- which means that each sample in the file is 2 bytes long, and describes a signed amplitude. So you can copy-and-paste chunks of samples without any problems, as long as their lengths are divisible by 2 (your block size). Your silences are likely of odd length, so that the 1st sample after a silence is interpreted as
QUESTION
I've been trying to write a program that takes a string as a input, and output will be the same string written in morse code, however in getting reading access violation, while using %s format specifier with *(mors + i).
...ANSWER
Answered 2021-May-15 at 15:25Two main problems in your code -
First, here you are passing the first string of mors
string array -
QUESTION
I am trying to build a responsive gallery from this tutorial. And here is my attempt on codesandbox.io
Whatever I try there is one little problem. It looks nice but somewhere in half or after half only four columns are shown instead of 5 as shown in the image below:
Code CSS (media query not included)
...ANSWER
Answered 2021-May-13 at 21:11The tutorial depends on the number of images and the image dimensions. Columns fill up vertically. The tutorial uses exactly 24 (small and big) images.
With two more images, it works in your case as you can see below. Run the code, click on full screen, and use a big screen resolution to see 5 columns.
QUESTION
I wrote a code which uses flutter_mobile_vision
and morse
to scan texts via mobile camera and covert those scanned texts into Morse code.
Here is my code:
ANSWER
Answered 2021-May-14 at 04:00mainAxisAlignment
property is How the children should be placed along the main axis in a flex layout. A Center
widget doesn't have mainAxisAlignment
property since it is not flex layout.
Here you can can use Column
widget.
QUESTION
I'm making my microcontroller display letters of the alphabet in Morse code using LEDS (dot == short blink, dash == long blink).
I could make a switch statement and do it like this :
...ANSWER
Answered 2021-May-08 at 15:25If we assume that your platform uses a character-encoding system in which the 26 Latin alphabet letters have consecutive values (the most common system used, ASCII, does, but it's not guaranteed by the C Standard), then we can define an array of strings for the Morse code for each letter and index into that array using the value of a given letter from which the value of 'A'
has been subtracted.
We can also do a similar thing for digits (these are guaranteed by the Standard to have contiguous codes).
Here's a sample code (we convert all letters to uppercase before indexing into the Morse array):
QUESTION
dic = {"A" : ".-", "B" : "-...","C" : "-.-.","D" : ".","E" : "..-.","F" : "..-.","G" : "--.","H" :"....", "I" : "..", "J" : ".---", "K" : "-.-", "L" : ".-..", "M" : "--", "N" : "-.", "O" : "---", "P" : ".--.", "Q" : "--.-", "R" : ".-.", "S" : "...", "T" : "-", "U" : "..-", "V" : "...-", "W" : ".--", "X" : "-..-", "Y" : "-.--", "Z" : "--.."}
code so far that is not working ...ANSWER
Answered 2021-May-06 at 00:05I'm not sure what you want but this code make sure that user input is only letters using regex
and while loop
then return a list
of the conversion:
QUESTION
I have a school project where I need to make a morse to english transaltor. I'm a newbie when it comes to Java so I was wondering if you could assist me. The problem is that I'm unsure on what I'm supposed to put on the while loop to turn the morse code to english. Any help would be appreciated. Thanks^^
...ANSWER
Answered 2021-May-04 at 14:22After you've read the input, split the input string by space. For each element, look up the morse code (key) to character (value) map and print the value.
QUESTION
I have a project where I need to get an input from the user, convert that to morse code and vice versa.
I have to use a hashmap, and my code looks like this. It's not really working. I'm having trouble understanding how I can print the input I get from the user on the class engToMorse.
I tried to look through other similar questions as well, but I couldn't find anything that could solve my issue.
Edit 1: By changing .toLowerCase to .toUpperCase, it does work, but only for one word. How would i go about making it work for multiple words, like a sentence. Edit2: That was fixed by adding translator.put(' ', " ");. How would I go about converting morse to english now? It is the same idea?
...ANSWER
Answered 2021-May-03 at 16:45Your hashmap translations have key is upper case and you was transform all character in your "sentence" to lower case. Change it back to upper case when you get the element in hashmap is the easiest way.
QUESTION
I am working on a Morse Code encoding/ decoding tool. I have completed the encoder, and I'm working on the decoder. Currently the decoding function "MorseCodeDecoder(MSG)" can decode a single letter at a time. It does this by checking every character in a string one by one and copying them to the variable, "EncodedLetter". The program checks each character to see if it is a space, if it is the program identifies this a gap between letter, for example:
MSG = ".... .." -*the function runs*- EncodedLetter = "....".
Then that value is back searched through a dictionary(using lists) to find what EncodedLetter's key whould be, in this case it's "H", the program also checks for double spaces which represent the space between two words. At this point in time it may sound fully functional; however after finding one encoded letter it can't find another, so earlier ".... .." it can't find ".." even though I reset the variable after it successfully decodes a letter.
ANSWER
Answered 2021-Apr-23 at 17:35Instead of blundering about with appending to strings and picking out each character from your encoded string to form a morse-code letter, you can just use str.join()
and str.split()
! Also, I suggest separating your encoded morse code letters by a character that cannot be a part of a correctly encoded string, such as /
. This way, you are sure that all spaces in the string are a space and all slashes in the string are letter separators. First, let's define the dictionaries for both encoding and decoding
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