calculatorsandstuff

side blog mostly calcultors (currently casio FX-991EX)

[11-515]

[shitzpostz]

[hatake]

aliexpress

[deolah]

[calculatorsandstuff]

[jinx88kc]

magnetic doll house #drawing #illustration

[ofcoursethatsathing]

This mouse I found at my work has a Calculator on it.

[ LINK HERE ]

[g0ds-favorite]

[lopmon]

[contac]

[calculatorsandstuff]

space people don’t feel gravity

[npylog-blog]

Retro-Graphics RG-512 unit fits inside standard ADM-3A terminal (shown) and allows point plotting and vector graphics on a 512 × 250 matrix.

[sci-universe]

My simulation of a device for creating a uniform magnetic field

This is a simulation of a 3-axis Helmholtz coil done for a course called Computational Physics. A Helmholtz coil consists of identical magnetic coils on a common axis, which create a fairly uniform magnetic field in the center. In this case there are three pairs of coils. And my model of it looks like a flower at a certain angle 😁

Such a cage can be used to simulate the geomagnetic fields that a satellite would experience in Earth’s orbit, and therefore to predict the behavior of a satellite and its components. Knowing the magnetic field vectors is of importance when determining a satellite’s attitude.

To know how much the direction of the magnetic field varies in the satellite, I calculated the angle of the magnetic field vectors in the satellite’s opposite corners (the satellite is not modelled into the cage here).

The result will be used for various sensor calibration uncertainty budget calculations for ESTCube-2 CubeSat.

I added two images of the geometry (first one just because it looks cool), and two of the resulting uniform magnetic field. I used COMSOL Multiphysics software.

[hyrodium]

[clearscience]

So a derivative is like picking two points on a graph and calculating the difference in the y-values and dividing by the difference in the x-values … when the two points you pick are infinitesimally close. Up above we’ve drawn a plot of temperature T versus distance x, and we’ve shown the derivative at three points.

The way you can picture a derivative is this: If you draw a straight line that barely touches the curve at one point only, then that line is called a tangent. And the derivative at a point tells you the slope of the tangent. Where the curve is steep, the slope is high (3) and where it’s not steep slope is low (1/3). (The -ve signs are because temp goes down as x increases.)

[oldsilicon]

1977 - Washington, UK - A Commodore PET (Personal Electronic Transactor) personal computer http://ift.tt/2oOkl0y

[fyprogramming]

Logic Gates!

Not - “0 in, 1 out; 1 in, 0 out.  Whatever you put in, you don’t get out.”

Buffer - “If you take the not of not, you get what you put in - 0 in, 0 out, 1 in, 1 out.”

NAND - “Both inputs must be brought up to 1 to lower the output to 0.”

AND - “If you negate the result of Nand, you get And.  Both inputs must be brought up to 1 to raise the output up to 1.”

OR - “If you not both inputs, and then Nand them together, you get Or.  If either input is raised to 1, the output raises to 1.”

NOR - “Negate both inputs, nand them together, and negate the output.”

XOR - “Xor is complicated - The large weight ands the inputs together.  The medium weights negate the inputs, but are pulled up by the large one when both are 1.  When you nor those together, you get Xor “

XNOR - “This is comparatively simple - just negate the output of Xor, and you’re there!”

Video Source

Images and Text Stolen from Imgur!

[intercal]

Holy shit, whoever devised these apparati is the truest graybeard computer scientist