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led indicator circuit? Answered

I would ask about led indicator circuit that works at 4v at high 3.7 medium and 3.5 low , I would the schematic and PCB design
Thanks

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randofoBest Answer (author)2017-08-16

The Electronics Class seems like a great place for you to begin learning about electronics! Once you figure out how LEDs work, you can then very easily design a circuit board for them.

https://www.instructables.com/class/Electronics-Class/

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