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  1. LED circuit - Wikipedia

  2. Simple Basic LED Circuit (How to Use LEDs) - Instructables

  3. Simple LED Circuits: Single LED, Series LEDs and Parallel LEDs

  4. Light Emitting Diode or the LED Tutorial - Basic Electronics Tutorials ...

  5. Guide to LED Circuit Designs and LED Basics & Operation

  6. Efficient LED Circuit Design | Science Project - Science Buddies

  7. LED Circuit Design- How to design LED Circuits

  8. How to Design Simple LED Driver Circuits

  9. Simple Basic LED Circuit – Beginner Electronics Project

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