Author Archives: Martin Horejsi

The Vernier Three-Axis Magnetic Field Sensor: A Magic Wand for Magnets

What could be better than one anisotropic magnetoresistance magnetic field sensor? How about three anisotropic magnetoresistance magnetic field sensors and a Hall effect sensor as well! Pack them all into a lightweight watertight housing with a rechargeable battery and wired or wireless connectivity and you’ve got yourself a Vernier Three-Axis Magnetic Field Sensor. I’ve been […]

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The Pasco Wireless Light Sensor: See the Light. And Measure it too.

Within an understated white plastic box is found a dynamic and versatile sensor that effectively measures many forms of light, and gives the science class a peek into how we learn about the universe we live in. Yes, the Pasco Wireless Light Sensor could easily go unnoticed in the science room’s box of technology. It […]

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The TI-Innovator Rover: A Vehicle for Coding a Vehicle

With all the connectivity possible built into the TI-Innovator Hub, it was inevitable that programable motorized peripherals would become available for I-Hub. And that day has arrived. Texas Instruments, the maker of the ubiquitous graphing calculators like the TI-84, has announced the TI-Innovator Rover, a two-wheeled programmable robotic vehicle designed to work directly (hardwired) with […]

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It’s more than just power, it’s teaching potential: Vernier Go Direct Sensors and Micro USB Charging

Power powers. It’s that simple. With all our digital tools, there is at least one common thread across it all and that is we need a flow of electrons to keep the teaching and learning in high gear. But of course batteries die. There are four common battery solutions in our digital devices. One is […]

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Videographing with The PocketLab: Experimental Imagination Unplugged

Imagine a little white box of about 30 cubic centimeters or a third of the size of a deck of cards. And only 23 grams. Now imagine that that little box can effortlessly and wirelessly measure and share data about motion, acceleration, angular velocity, magnetic fields, pressure, altitude, and temperature all streaming on demand to […]

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The Surefire FirePak: A Smartphone Science Studio Lighting Solution

As smartphone cameras take on an ever-more sophisticated role in the science classroom, the technical limits of phone photography become more apparent. Luckily, a dose of strong light can overcome many problems as well as provide access to a world unseen by the human eye. But not just any light will work. The amount, color, and frequency […]

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The goTenna Off-Grid Communication Device: Take A “Cell Network” on your next Field Trip

Imagine co-leading a science field trip indoors in a large museum with questionable cell coverage, or outside and too far from the nearest cell tower. The goTenna system allows you to directly contact another goTenna equipped teacher using their smartphone independent of a cellular connection. The goTennas are their own communication network that runs between […]

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The Celestron Micro-Fi Wireless Digital Microscope: A Handful of Wow!

The term “wireless” does not so much describe what is, but instead what isn’t. And what isn’t is wires. What’s strange about many wireless technologies is there was never a wired version to begin with so describing the device by an absent feature that never was present in the first place can be confusing to […]

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The Carson HookUpz 2.0: The Missing Link Between Camera and Eyepiece

Over the years I have held digital cameras and phones up to the eyepieces of telescopes, spotting scopes, binoculars, and most often microscopes to take pictures, capture video, and stream imagery to projectors and TVs. In all cases the idea was sound and the optics were fine, but the execution needed work even when duct […]

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The Micro Phone Lens: A Tiny Solution to a Huge Problem

Other than computer code, the Micro Phone Lens just might be the lightest accessory you can add to your tablet or phone. Weighing in at a fraction of a gram, the tiny lens leverages the optical power of existing cameras on phones and tablets. And like a contact lens, its power is not measured in […]

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