Science Project Summary:

How to build a flashlight using Light Emitting Diodes (LEDs)

Advanced 7
Difficulty: Advanced 7
Required Skills: None
Safety concerns: None
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Abstract:
This cool astronomer's LED flashlight is really two flashlights in one. There are two power switches, each controlling an LED. An LED is a light emitting diode, which is an electronic device that requires very little current to run, so the batteries last a very long time. Also, LED's do not burn out.