Linux and disk images
From time to time there is a need to take files on a device and convert these to something else.
First example, if you have installed media for a Linux OS on a flash disk, and you want to re-create an ISO file from this, the following may be useful.
Similarly, you may have a SD card or flash disk with a set of files, that you want to back up, you could copy the files to another device OR create a disk image that can be stored and later copied back on to an SD card for example.
Note: I have included links to the videos which are stored on my peer tube account.
Code Club Electronics 13
So further to my previous attempt, I have now made some progress with this. New code is as follows
// the setup function runs once when you press reset or power the board
float floatMap(float x, float in_min, float in_max, float out_min, float out_max) {
return (x - in_min) * (out_max - out_min) / (in_max - in_min) + out_min;
}
const int buzzer = 5;
void setup() {
// initialize digital pin LED_BUILTIN as an output.
pinMode(buzzer, OUTPUT);
}
// the loop function runs over and over again forever
void loop() {
// read the input on analog pin A0:
int analogValue = analogRead(A0);
// Rescale to potentiometer's voltage (from 0V to 5V):
float voltage = floatMap(analogValue, 0, 1023, 0, 5);
tone(buzzer, (voltage)); // 1khz tone to buzzer
delay(analogValue); // wait for time period linked to pot input value
tone(buzzer, (voltage)); // 1khz tone to buzzer
//https://www.instructables.com/How-to-use-a-Buzzer-Arduino-Tutorial/
}
The main difference here is that I am binding the buzzer tone to the voltage
float voltage = floatMap(analogValue, 0, 1023, 0, 5);
tone(buzzer, (voltage)); // 1khz tone to buzzer
delay(analogValue); // wait for time period linked to pot input value
tone(buzzer, (voltage)); // 1khz tone to buzzer
This sort of works, but the frequency isn't very high.
Tags
#Arduino,#Electronics
PG Science books
Physics
People
Physics books
Maths
Libretexts
Open Stax
Tags
#Books,#Science,#ProjectGutenberg,#Maths,#Chemistry,#Physics
EdX LaTeX course
I have signed up to the LaTeX course IITBombayX: LaTeX for Students, Engineers, and Scientists [1] on the EdX website [2]. I have provided a link to university of Bombay for reference [3]
Looking at the course learning outcomes, I seem to know quite a lot already, however I need to improve how I organise and layout documents.
A while back I undertook an experiment on Acidity of Seawater and how this can be changed with eggshells. I want to go back to the write-up and make it look a much more professional, which I should be able to do with the help of this course.
Post for here
References
- IITBombayX: LaTeX for Students, Engineers, and Scientists
- EdX
- IITBombayX
Tags
#Course,#LaTeX,#Writing,#Learning
2023 Nobel Prize : Chemistry
The 2023 Nobel Priize for Chemistry was awarded for Quantum Dots. The info graphic is below. While not an academic source of information, there is an article on WikiPedia about this.
Quantum dots are semiconductor nanocrystals are semiconductor particles a few nanometres [1]. So there is some real potential here to make smaller circuits etc I guess. I have also linked to arXiv that has several papers on this topic [2].
References
- Quantum Dots on WikiPedia
- Papers on arXiv
Tags
#Science,#Nobel,#QuamtumDots
console / terminal xmas tree
Nice shell script to make a colour Christmas tree on your terminal / console
#christmas,#shell,#coding,#hacking,#draw,#xmas,#tree,
#xmastree,#bash,#scaleway,#animation
This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License
LibrePlanet 2024
We now have more details of the 2024 LibrePlanet conference, presented by the Free Software Foundation.
More details will be available in due course.
Links
Tags
#FreeSoftware,#fsf,#Conference,#Event
ESA – Innovative X-ray lobster-eye mission set to launch 2024
Image embedded from website below
The next generation of X-ray probe will launch in January 2024. This mission will help us discover more x-ray sources and much more.
Tags
#ESA,#Space,#Science,#Mission,#Einstein,#X-ray,#Probe
Understanding the Atmospheric Effects of Spacecraft Re-entry
This was posted to the Fediverse. The original post from COSPAR, The Committee on Space Research (COSPAR): can be found here
This is an upcoming workshop looking at the environmental impact of spacecraft reentry in to the Earths Atmosphere.
This workshop will address the impact of spacecraft re-entry on the atmosphere. The aim is to bring together atmospheric chemists and physicists, material experts, the space industry, and international space research related organizations to highlight the gaps in our understanding of the modelling and how we can improve testing to obtain relevant data and suggest appropriate mitigation and regulatory measures.
This sounds like a fascinating area of research and discussion, as any exploration of space needs to take into account any environmental impacts.
Understanding the Atmospheric Effects of Spacecraft Re-entry (10-11 January 2024): Overview · Indico at ESA / ESTEC
Workshop information
It will be interesting to learn about the findings and conclusions from this, as it will open up further discussion on the topic(s) raised.
Links
Tags
#Space,#Conference,#SpaceCraft,,#Reentry,#Atmosphere,#Science
NFL 2023 week 16
NFL week 9 fixtures can be found here
Links
Tags
#Football,#NFL,#Week16