electronics-tutorials.ws
Electronics Tutorials provides educational lessons, courses, tutorials, or study material for self-learning.
Directory
Science & Mathematics
Science and mathematics collects references, databases and study material for science and maths subjects. The listings cover chemistry, physics, biology, astronomy, earth science and maths, with a mix of reference databases, course pages, calculators, simulations and self-assessment tools. Some entries are large public databases such as compound or species catalogues, and others are small teaching sites or video series. Worth checking: the level each resource aims at, the date of its data and whether the authors are named. Accuracy matters most here, so prefer sources that explain how their numbers were produced.
emcrit.org
EMCrit is a blog and podcast covering emergency department critical care, trauma, and resuscitation for medical education. It publishes episodes and posts on topics such as procedural sedation, hemodialysis catheters, and sepsis research.
engineersedge.com
Engineers Edge is an engineering reference site offering calculators, charts and tools for structural, mechanical and design work. It includes beam and stress calculators, fastener and bolt design resources, flat plate deflection equations, and applications such as a 2D statics modeler, GD&T writer and gear builder. Premium design and engineering spreadsheets require an annual membership.
eyewiki.org
EyeWiki is an educational resource for documentaries, courses, books, reference material, or self-learning.
hdlbits.01xz.net
HDLBits is an educational resource for documentaries, courses, books, reference material, or self-learning.
helistart.com
HeliStart is an educational resource for documentaries, courses, books, reference material, or self-learning.
hemonc.org
HemOnc is an educational resource for documentaries, courses, books, reference material, or self-learning.
horizon-eda.org
Horizon EDA is a free and open source electronic design automation package for printed circuit board design. It allows users to maintain and share a pool of parts, draw schematics, and design, 3D-preview and export PCB layouts for manufacturing. It runs on Linux and Windows.
images-of-elements.com
A virtual museum of pure chemical elements from the periodic table, with images and information published under a Creative Commons license. It includes a periodic table linking to element pages, plus games, calculators, and a simulation.
inaturalist.org
iNaturalist is a free, nonprofit social network for naturalists where users record observations of plants, animals, and fungi, share them with friends and researchers, and get identification suggestions confirmed by a global community. Observations become open data used by scientists and conservationists.
jcrocket.com
A personal site about model and high-power rocketry by John Coker, documenting his rocket fleet and launch reports. It also hosts how-to articles on techniques and research, and links to related resources.
kicad.org
KiCad is an open source PCB design and electronics CAD suite for Windows, macOS and Linux. It includes a schematic editor, a PCB editor and a 3D viewer, and is described as forever free. The schematic editor supports hierarchical designs and includes an integrated SPICE simulator and electrical rules checker. Documentation is written and maintained by a volunteer docs team.
labxchange.org
LabXchange is an educational resource for documentaries, courses, books, reference material, or self-learning.
lammps.org
LAMMPS is a classical molecular dynamics simulator focused on materials modeling, distributed as open source under GPLv2. It provides potentials for solid-state materials and soft matter, and can model atoms or act as a parallel particle simulator at atomic, meso or continuum scale. It runs on single processors or in parallel using message-passing techniques, with some models accelerated on CPUs and GPUs.
lavteam.org
LavTeam is an educational resource for documentaries, courses, books, reference material, or self-learning.
librepcb.org
LibrePCB is a free, open-source, cross-platform electronic design automation suite for drawing schematics and designing printed circuit boards. It offers a schematic editor and board editor, a semantic library concept, human-readable file formats, and optional library manager and PCB fabrication service. A command-line tool supports headless checks and data exports. It is available in 15 languages and can be used fully offline.
chem.libretexts.org
LibreTexts Chemistry is an educational resource for documentaries, courses, books, reference material, or self-learning.
linear.axler.net
Linear Algebra Done Right is a textbook for a second course in linear algebra aimed at undergraduate math majors and graduate students. The fourth edition is an Open Access book under a Creative Commons BY-NC license, available free electronically in English, Chinese, Farsi, Greek, Hebrew, and Portuguese. It contains over 250 new exercises and over 70 new examples, and defers determinants to the end.
macroinvertebrates.org
Macroinvertebrates.org is a taxonomy browsing site for aquatic macroinvertebrates. It presents insect orders, families and genera, including beetles, true flies, mayflies, dragonflies and stoneflies, with collection and taxa list views. It also provides an identification key, training materials, a practice quiz, a glossary and a PocketMacros app.
malacards.org
MalaCards is an educational resource for documentaries, courses, books, reference material, or self-learning.
manim.community
Manim is an educational resource for documentaries, courses, books, reference material, or self-learning.
material-properties.org
Material Properties is an educational resource for documentaries, courses, books, reference material, or self-learning.
mdcalc.com
MDCalc is a source for medical equations, algorithms, scores, and guidelines. It offers a library of calculators, including the Cockcroft-Gault creatinine clearance equation, a weight-based levothyroxine dose calculator, CKD-EPI GFR equations, mean arterial pressure, and the SpO₂/FiO₂ ratio. Tools can be browsed by specialty and filtered by calculation purpose.
molview.org
MolView is a chemistry web tool for sketching and viewing small molecules, with live 3D synchronization while sketching and multiple structures side by side. It includes Lewis structures, reaction diagrams, spectroscopy data, crystallography loading, protein viewing and calculations such as MEP surfaces and energy minimization. A new version has been developed since 2024, while an older app remains available.