🎓 Doc Freemo 🇳🇱 @freemo@qoto.org

I lost 24 lbs in 35 days so far.. was stalled for about a week there but after increasing my water intake I shot down pretty quick and am back on track!

So after reading a misleading meme on the internet I was compelled to compare the COVID situation in Canada over the past few months to that in the USA. This is what I notice.

The Canadian stock market has crashed by a thousand points since the beginning of the year and COVID cases in Canada have **increased** 700% since mid june... Compared to america where the stock market has **increased** by 3,000 points since the beginning of the year (thatsa 33% increase) and covid cases has **dropped** by more than 50% since the beginning of july.

The issue with lockdowns is they look great to everyone who is too ignorant to understand whats going on, but they devastate the economy and do no good because the second you let up the lock down no one has immunity and the virus spreads like it is new. So in the long run you get hit hard in the wallet AND in terms of the infection. Meanwhile the americans approach may have resulted in more infection early on but fewer in the long term and without damaging the economy along the way.

What is your favorite open-source EDA software?

#EE #Electronics #ElectricalEngineering

I have absolutely no regrets sharing this!

Interesting fact of the day:

Meteores got their name because earlier scientists thought they were made out of hamburgers, so they were called "Meaty Ores". It wasn't until many decades later we discovered this wasn't true but by the then the name was already common place.

So I just provided the answer to this Stackexchange question and I noticed something kinda cool and interesting in the final equation:

https://electronics.stackexchange.com/questions/520155/in-magnetically-coupled-coils-what-is-the-difference-between-coefficient-of-cou

The equation, for those of you on a Latex capable instance is:

\( k \cdot \frac{N_p}{N_s} \cdot \sqrt{\frac{L_s}{L_p}} = R_\phi\)

In this case R, the flux linking ratio, must be a value between 0 and 1 and represents the percentage of flux that is mutual between two coupled inductors (a transformer).

Similarly k is Coefficient of Coupling, which is also a ratio between 0 and 1. It is a different measure of how well coupled two inductors are.

What I find interesting about the equation is that all the other variables can be anything from 0 to infinity, so at first glance you would think that it would be possible to have a scenario where either R or k are greater than 1. But in reality because the number of windings of the primary and secondary have a reciprocal relationship to that of the square root of the ratio of the inductances, in reality any real world values that you could plug in here would actually never be able to produce a contradiction.

If you look at the equation to calculate the inductance of an inductor based on its number of turns this becomes obvious. for simplicity if we assume the diameter if the inductor and the wire thickness are all the same then the relationship is basically the following:

\( L = N^2 \cdot C \)

Where L is the inductance, N is the number of turns, and C is some constant. So essentially the square of the number of turns of the inductor is linearly proportional to its inductance. Going back to the equation I was talking about this basically counters the sqrt function in the equation and it becomes obvious why any real world values would always satisfy the equation correctly.

#Electronics #ElectricalEngineering #EE #Math #Science #Physics #Maths #Mathematics

A fun article I just wrote explaining what the Reflection Coefficient is and how it can be used:

http://jeffreyfreeman.me/understanding-the-reflection-coefficient/

#Electronics #RF #Radio #Maths #Math #Mathematics #Physics #HamRadio #Ham #AmateurRadio

Interesting fact of the day: The first words spoken on the moon was "That's one small step for _A_ man, one giant leap for man kind". However due to a misinterpretation he has always been consistently misquoted as saying "..one small step for man..."

I saw a user with the name analog today and I I cant tell if that is suppose to be short for "Anal O.G." or not

For those wondering All the services on QOTO that we run costs us about 1,800$ a year (used to be twice that before i bought reserved instances).

hey @Josefine I just remembered this tool I posted about. It is another solution that will help you migrate to qoto despite the block.

I spotted a Mega-Karen also called a Megalolis Karenopis by their scientific name.

Paranoid Schizophrenia is a hell of a hard disease to deal with when your friend gets it.

My friend developed it a few years ago when we were working on a company together. He was about at the age of onset.

I have dealt with a lot of diseases among my friends including drug addiction, depression, anxiety, but of them all Schizofrenia is the hardest because even if they want to they cant understand or listen to reason, so no words or even actions can be effective most of the time.

Its a hell of a disease and worse yet him as someone who is suffering with it has lost almost all of his friends and it isnt helping him mental health or ability to correct the problem.

#Schizofrenia #MentalHealth #Disease

WOOT! Just got notice fromt he fab shop the boards are in the machine right now!!! So excited!