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Light Modulator NGSS

SKU #LGT-350
Backordered until 8/20/2024
*Backordered: 8/20/2024
Sound will "ride" the light beam to the solar panel receiver!

AAA Alkaline Batteries - Pack of 4

Availability: In Stock
AAA Heavy Duty alkaline batteries. Sold in packs of 4.


This has to be one of the most engaging light modulation demos ever! The Light Modulator is an easy-to-use, plug-and-play demonstrator of light and physics principles that will leave your students in awe. Plug the flashlight transmitter into a cell phone, play a song, and the sound will "ride" the light beam to the solar panel receiver! Ten unique experiments are provided. You'll be teaching concepts such as amplitude modulation, AC vs DC, fiber optics communication, persistence of vision, molecular kinetic theory, light properties, the Inverse Square Law and more. Requires 3 AAA and 2 AA batteries and a cell phone or MP3 player.

Here's how it works:

  1. Plug the flashlight into your mobile phone
  2. Activate the solar panel connected to a pre-amp and speaker
  3. Play a song on the phone and the sound will ride the light beam to the solar panel. How cool is that?

The phenomenon is known as Amplitude Modulation (AM), the same as the AM on your radio! You now have the ability to transmit sound (information) on a carrier (light) beam! We have fine-tuned and re-designed this technology into this easy-to-do kit for all science teachers and science demonstrators. All you need is your mobile phone and you're ready to amaze...

Kit includes:

  • A flashlight transmitter
  • A solar panel receiver with amplifier & speaker
  • USB cable to charge the speaker
  • Bulb-shaped flickering LED light
  • Flickering RGB ball
  • Sugar beads, mirror and clear jar
  • Instruction sheets


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5 reviews
Review star icon Review star icon Review star icon Review star icon Review star icon Oct 13, 2020
Got the device and can barely hear the sound coming off it even with charged batteries. At least the the flashlight works.
Christopher Keller
Owner Response: Hello Christopher, someone from our customer service team will be reaching out to you. Clearly, that's not how the product is supposed to perform. We will get your issues fixed, so you will be able to amaze your students!

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1   0

Perfect for Amazing Students
Review star icon Review star icon Review star icon Review star icon Review star icon Feb 11, 2019
This demo is mind-boggling! When every I show it to students, they are awe-struck, thinking that this is some magic trick. A very nice set of activities to teach students about waves, light, optics, etc. The flashing LED came broken, but I called and was able to get it replaced for free.
Jeromy Rech

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unique sound demo
Review star icon Review star icon Review star icon Review star icon Review star icon Feb 11, 2019
I have two audience members come up to help hold everything and used a microphone on a mic stand so the audience in the lunch room could hear the sound effects and the music when I used my MP3 with the modulator. The package comes with many different props to do a variety of demonstrations. The only other thing extra I bought was some fiber optic strands. This item was a perfect addition to my science of sound presentation. Very unique and cool.
mark carter

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100% Awesome
Review star icon Review star icon Review star icon Review star icon Review star icon Sep 22, 2018
Even the adults were amazed. An excellent way to explain AM, FM, cell phone transmissions and more. I'm using it in college classes and for young children with age appropriate explanations of the content. 100% WOW factor and clearly shows what you've been explaining.
Jaime Demick

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2   0

Something different
Review star icon Review star icon Review star icon Review star icon Review star icon Sep 6, 2018
This is a way cool demonstration and perfect to add to my sound and light presentation. I found a fiber optics bundle on line as shown in the video because it does not come with the kit. Great information page and the props seem to be well made. I recommend removing the batteries from the speaker box when storing and you have to charge the speaker itself with the enclosed cord but you supply the plug. I like the light!
mark carter

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3   0


This product will support your students' understanding of the Next Generation Science Standards (NGSS)*, as shown in the table below.

Suggested Science Idea(s)


Students can use the Light Modulator and the various accessories included in the kit to conduct a multitude of fascinating investigations. The different sources of light can be interpreted by the modulator into a variety of audible sounds.

Students can use the light modulator in a variety of investigations to better understand how light waves travel. The use of Fiber optics leads students to better understanding of real world technology.

Modern communication systems, such a long-distance phone lines and high-bandwidth communication line for computer, commonly use modulated signals carried on a beam of light. The relatively high frequency of visual light can carry a lot more information than lower frequency radio waves.


* NGSS is a registered trademark of Achieve. Neither Achieve nor the lead states and partners that developed the Next Generation Science Standards were involved in the production of, and do not endorse, this product.

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