Articles
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How to Make a Moving Pictogram GIF in AnimeEffects, Explained with Screenshots
Split a pictogram in PowerPoint, add bones in AnimeEffects, and export a waving-arm GIF. Current zips already include FFmpeg; menu names on the screenshots may differ in newer builds.
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How to Do a Perspective Transform in OpenCV, Explained with Images and Coordinates
Use Python and OpenCV to map an image’s four corners onto four new ones. getPerspectiveTransform builds the matrix; warpPerspective warps the 600×600 grid. The article also shows why a too-small output canvas crops the stretched top.
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How to Make Pyramids, Cones, and Helices in SolidWorks, Explained with Screenshots
Sketch a base, offset a plane with Reference Geometry, and place a vertex — Loft then makes a pyramid or a cone. Three planes and a rotating click order on the corners make a twisted column. Screenshots are SOLIDWORKS Premium 2017, with English labels on the steps.
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How to Make L-Bend Sheet Metal in SolidWorks, Explained with Screenshots
Sketch an L-shaped profile, then set thickness, extrude depth, and bend radius in Base Flange — that is the simplest bent sheet-metal part in SolidWorks. The walkthrough also shows how to reveal the Sheet Metal tab and how to pick up a sketch you already exited, with numbered screens for…
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Forward and Inverse Kinematics Explained with Live Diagrams (2): Workspace and Singularities
Where a planar arm can and cannot reach, where its two solutions collapse into one, and how much reach you give up once you also fix the orientation of the tip — explained with diagrams you can drag.
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Forward and Inverse Kinematics Explained with Live Diagrams (1): The Planar 2-Link Arm
Forward kinematics turns joint angles into a tip position, and inverse kinematics goes back the other way. Both are explained here with a planar arm you can drag: why the forward direction has exactly one answer, why the inverse one has two, and what a third link buys you.
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Rotary Encoders Explained with Live Diagrams (1): Binary, Gray, Incremental
How rotary encoder discs carry position: multitrack absolute discs in binary and Gray code, plus incremental A/B channels, shown with diagrams you can spin.
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Rotary Encoders Explained with Live Diagrams (2): Single Track, Hybrid, Vernier
Single-track PRBS, hybrid coarse-plus-fine, and vernier encoder discs explained with diagrams you can spin, including what each figure deliberately leaves out.
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What Is PID Control? P, I, and D Explained with Live Circuits
PID control, explained hands-on: every figure in this article is a live circuit with real-time charts that respond the moment you move a slider. We start from plain on-off switching and add one term at a time — P, then PI, then PID — so the meaning of each letter…
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Why Don’t FLOAT Sums Add Up? Floating-Point Rounding Error, Explained with Live Graphs
Every receipt checks out on its own, yet the monthly total is one cent off — usually that’s not a bug, it’s floating-point numbers (FLOAT) holding values only approximately. This article lets you see it happen, interactively: a number line showing how decimal 0.1 misses the binary tick marks, a…