schematics

/schematics420

A channel for sharing schematics, processes, and everything in between. Viewing the internal systems of things we love.

If anyone is interested in becoming a member of the /schematics channel, feel free to message me!

I'm happy to have more people sharing interesting things here.

Florence Kelley, Chicago Wage Maps, 1895.

how the SNES graphics system works

If we zoom into the graphic system, we find four chips. One is called the Pixel Processing Unit 1 (PPU1), labeled 5C77. Another is called the Pixel Processing Unit 2 (PPU2), labeled 5C78. The two remaining are 8-bit 32KiB SRAM chips.
https://fabiensanglard.net/snes_ppus_how/

Let’s see if this works.

Having trouble tracking down the source publication of this illustration but it is too good not share. Found in a research folder on an old computer while I trying to track down something unrelated today.

Kernschede illustration - Meijer, J.G, 1905

via Koninklijke Bibliotheek

Lissajous Quiz, Popular Electronics (1980)

an unknown frequency can be determined by applying it to a scope's vertical terminals, while a signal of known frequency is applied to the horizontal. The resulting display, a Lissajous pattern, can then be analyzed to find the unknown. The ratio between the frequencies is equal to the ratio of the number of cycles (including halves) produced in each direction. For example, if there were 3.5 horizontal cycles and two vertical, the ratio would be 3.5:2 or 7:4. Then, if the horizontal frequency were 1000 Hz, the unknown would be 7/4 times 1000 or 1750 Hz. See if you can determine the unknown frequencies for the Lissajous patterns shown here. Answers are below.

sketch pad, computer controller cookbook by tom & kelda riley (1983)

Tesseracts (hypercubes) from "The Fourth Dimension" by Charles Howard Hinton (1904)

Notation showing the positions of the arms in 18th century ballet

From "Traite sur l'art de la danse" (Malpied, 1789)

There is some chance I've already posted these, but I am not sure. I first came across these stunning geological diagrams via @geoffmanaugh on X. originally published by the United States Geological Survey

↓↓↓ For more

~△ Illustration from Merkwurdige phanomene an und durch verschiedene prismen: zur richtigen wurdigung der Newton'schen und der von Gothe'schen farbenlehre - Johann Friedrich Christian Werneburg, 1817

Frauhofer patterns from 'Diffraction in the Fundamental Laws of Wave Theory - Friedrich M Schwerd [1835]

Might make a good design for a music studio sound diffuser (geometry based on prime numbers)?

Axonometric Drawing
Konrad Puschel, Bauhaus, 1929

Illustration from Le Dictionnaire encyclopédique Quillet (date not certain but most likely the 1934 ed?)

Diagrams of the "K-system" by Hiroshi Kawano. Via @satoshi-aizawa on X

De Alchymia Sophistica, combinatorial table

latin loose translation: "you shall make five materials of stone, five metallurgical art, five mixtures of metallic bodies, five again of the genesis of which you shall apply to chemical operations, useful and fruitful."

A. Kircher, Mundus Subterraneus (1634)

Image from the Master Weaver's Thesis Book | Systeme de la Mecanique a la Jacquard, 1848

Diagramming the kinematic mind-field....

Vorträge über Kinematik, Golisch, 1870.

illustrations from Terrestrial Magnetism & Atmospheric Electricity, Journal of Geophysical Research [1896]

rarely see physical models anymore, the feel is wonderful

designers: A. Gomis, D. Cler, E. Ciriani, L. Yvanes, M. Yung, H. Bier, P. Salles. Casabella (1965)

Peering into the belly of the beast.
Kaiju-monster Japanese anatomical illustrations by Shogo Endo and Shoji Ohtomo.

The Formal Generators of Structure by Stanley Tigerman and G. T. Crabtree (1968)
Pinwheel Form

"Life in the Water"
Series of advertising trade cards from Erdal Kwak wax company (late 1920s)

/schematics