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One LED minimal need 3 V DC to light up. But on this eksperiment we can light up 15 LED with 1,5 V bateries.

Step 1: Used Toroid From Broken Lamp

images from : www.eyuana.com

I used toroid from broken lamp, and we can used transistor on this part

Step 2:

This schematic for this project, look at the turn of toroid.

Step 3: PCB This Project

U can used this PCB to make this project

Step 4: Finish This Project

this picture of FINISHED my project

Step 5: Alternative Design

This alternative design for 1,5 V light up more LED.

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