TECH NEWS

A Robot Dog Built from Scratch

Building a quadruped robot from scratch is a huge undertaking for a hobbyist. There are the mechanics, electronics, motion control, perception, navigation, and a whole lot of software tying everything together. Developer Ashish Agrahari decided to tackle all of that himself with Orion, an impressive ROS 2-powered robot dog that took him eight months to build.

Orion has 12 degrees of freedom, with three actuated joints on each of its four legs. Agrahari designed the chassis in SolidWorks and 3D-printed the parts, while bearings support all 12 joints. The feet were made using two-part silicone molds, and magnetic mounts provide tool-free access to the electronics inside. Before assembling the complete robot, Agrahari built a single-leg test rig on a linear rail so he could work out inverse kinematics and gait control without repeatedly sending the entire robot crashing to the floor.

The control board (📷: Ashish Agrahari)

The brains of...

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Today’s NYT Mini Crossword Answers for Friday, Sept. 11

Looking for the most recent Wordle answer? CNET publishes daily answers and hints for The New York Times Mini Crossword, Connections, Connections: Sports Edition and Strands puzzles. The Mini Crossword is a nice break from the tougher puzzles, and it takes only a fraction of the time of the vaunted

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Today’s NYT Strands Hints, Answers and Help for Sept. 11, #922

Today’s Strands puzzle features a fun, evocative theme. If you need hints and answers, read on. Hint for today’s Strands puzzle Today’s Strands theme is: Harbor view. If that doesn’t help you, here’s a clue: Life by the water. Clue words to unlock in-game hints

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Today’s Wordle Hints, Answer and Help for Sept. 11, #1910

Today’s Wordle answer is a lovely word, with pretty common letters. Read on for hints and the answer. Before we show you today’s Wordle answer, we’ll give you some hints. If you don’t want a spoiler, look away now. Wordle hint No. 1: Repeats Today’s

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Today’s NYT Connections Hints and Answers for Sept. 11, #1188

Today’s NYT Connections puzzle is a tricky one, especially the purple category. Read on for hints and today’s Connections answers. Here are four hints for the groupings in today’s Connections puzzle, ranked from the easiest yellow group to the tough (and sometimes bizarre) purple group. Yellow group

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Today’s NYT Mini Crossword Answers for Friday, Sept. 11

Today’s NYT Strands Hints, Answers and Help for Sept. 11, #922

Today’s Wordle Hints, Answer and Help for Sept. 11, #1910

Today’s NYT Connections Hints and Answers for Sept. 11, #1188