Energy Meter

by littleBits

Published on April 28, 2014

Discover sources of energy around you with the Space Kit. Get yours today!
Make an energy meter with the light sensor and the number module. 

Digital cameras create images by measuring light energy. This is similar to how NASA satellite images are created by measuring energy reflecting off the Earth's surface. 

Visit our lessons page to learn about light brightness and the inverse-square law.

You can also find this project on page 14 in the Space Kit booklet.

How To Make It


Start with this circuit pictured in the image gallery.


Walk around and find different sources of energy. For example: Hold your circuit to the sun or light bulbs or in the dark. Record your findings in table. If you have trouble seeing the numbers change, adjust sensitivity with screwdriver. 


Move the sensor closer or farther from the energy source. Record your observations in a table.


Can you see any energy coming from a TV remote control? What happens if you point it at the energy meter and press a button? (hint: most remotes have IR LEDs)

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