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How Do You Dim an LED?
Have you ever seen an LED-based headlamp that has selectable brightness? Sometimes the brightness change is from turning on more or fewer LEDs, but sometimes the individual LEDs seem to change brightness. How does this work? Usually when you reduce the voltage across an LED, it just goes out. We looked into this question using a Vernier Light Sensor and a LabQuest.
LabQuest Earns Five-Star Review
The Vernier LabQuest just received a wonderful review in MultiMedia & Internet@Schools, an educational publication. The review gave the LabQuest a 5-Star rating (out of 5) with the following grades:
- Installation: A
- Content/Features: A
- East of Use: A
- Product Support: A+
“Students will enjoy using LabQuest…. I was impressed by the rugged construction. This is definitely a tool that will last, which makes it an excellent buy—especially with today’s tight funding…. I have no doubt that LabQuest is going to get plenty of use in my classroom. I would highly recommend it for every classroom that is serious about engaging students in meaningful scientific investigations.”
Multimedia & Internet @ Schools
Sally Finley
Country Hills Elementary School
Coral Springs, Florida
Read the full review »
Learn more about the Vernier LabQuest »
Rotary Motion Sensor
Our redesigned Rotary Motion Sensor lets you monitor angular motion to a quarter of a degree and linear position to a fraction of a millimeter.
Digital Radiation Monitor
The Digital Radiation Monitor can be used with or without a computer for measurement of alpha, beta, and gamma radiation.
New Dynamics System Accessories
Study friction or constant force on the Vernier Dynamics System with the new Cart Friction Pad and Cart Fan! Both work with Vernier carts using magnets, making it easy to attach and remove.
Vernier LabQuest
Vernier announces breakthrough data-collection technology for science education—the Vernier LabQuest.
LabQuest works as a stand-alone device or as a computer interface, providing the versatility to excel in the classroom or in the field.
The Vernier LabQuest includes built-in software for data collection, graphing, and analysis, and on-board applications such as a periodic table and stopwatch. Use the powerful and intuitive software from the vivid color touch-screen—all packed in a rugged and water-resistant exterior.
The freedom to inquire. The technology to excel. The Vernier LabQuest.
Fathom Dynamic Data™ Software
Fathom Dynamic Data Software—now compatible with Vernier sensors—gives students the tools to collect real-time data quickly and create mathematical models to explore physical phenomena in depth.
Red Tide Emissions Spectrometer
The Ocean Optics™ Red Tide Emissions Spectrometer is the perfect tool to conduct emissions analysis and much more. It connects directly to your computer with a standard USB cable and gives precise measurements instantly over a range of 380–950 nm. Use the Red Tide Emissions Spectrometer with a recommended Optical Fiber Assembly to add versatility and allow a greater range of analysis options.
Wireless Dynamics Sensor System
Combine a 3-axis accelerometer, a force sensor, and an altimeter into one unit that communicates wirelessly with your computer and you’ve got a truly wireless system. The Wireless Dynamics Sensor System is a complete data-collection system completely free of friction due to cables.
Measuring Tennis Racket Forces
Thomas Haff, physics teacher at Issaquah High School in Issaquah, Washington, often gives his students inquiry based problems to solve. This year, he asked his students to determine the amount of force a tennis racket will exert on a tennis ball.