In this video I'm building an Arduino Heart Rate Monitor that is housed in a toy handle in the style of the Star Trek Tricoder. The device uses the PulseSensor with an Arduino Pro Mini and an OLED ...

Eddy currents are not just textbook curiosities; they are the hidden loops that appear whenever metal meets a changing magnetic field. From DIY levitation tricks to clever braking systems, these ...

Light aircraft often use a heading indicator as a way to know where they’re going. Retired instrumentation engineer [Don Welch] recreated a heading indicator of his own, using cheap ...

STRAITS OF FLORIDA — At 2 a.m., oceanographer Ryan Smith was headed into his 12th hour of work with little sleep when trouble started. From the rear deck of the University of Miami’s research boat, he ...

After Qualcomm’s purchase of Arduino it has left many wondering what market its new Uno Q board is trying to target. Taking the ongoing RAM-pocalypse as inspiration, [Bringus Studios] made a tongue-in ...

James Chen, CMT is an expert trader, investment adviser, and global market strategist. Dr. Melody Bell is a personal finance expert, entrepreneur, educator, and researcher. Melody now develops ...

Your phone isn’t listening. The truth is scarier. Today’s episode breaks down exactly why all those ads seem magically made for you. Plus: how a hacker used Sony’s own chatbot to steal $20,000 worth ...

Clay Halton was a Business Editor at Investopedia and has been working in the finance publishing field for more than five years. He also writes and edits personal finance content, with a focus on ...

Lauren Graves is an educator-turned-editor specializing in personal finance content. She seeks to make complicated topics easier to understand and less intimidating to the average reader with accurate ...

Gear-obsessed editors choose every product we review. We may earn commission if you buy from a link. Why Trust Us? Here’s what you’ll learn when you read this story: Many philosophers and scientists ...

URC 2026 System Acceptance Review (SAR) White House stalls release of approved US science budgets. The US Congress rejected sweeping cuts to science agencies. But the NIH, the NSF and NASA have had ...