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pwm 555 - Recherche Google

All the electronics info you need to know about the 555 Timer. With over 80 different electronic circuits that you can build.

LED Clip by sungho lee: Illuminate by clipping onto batteries. #LED_Clip #sungho_lee

Concept from Korean designer Sungho Lee: Intuitively, I love it! How clever! I want to make a bunch of my own—as I imagine Mr. Lee did—by cutting up some paper clips, clipping the leads on a bunch of LEDs, and soldering the one to the other.

Single LED Dropping Resistor Circuit

LED Current Limiting Resistor Calculator: Identify series resistor based on supply voltage, forward voltage, current requirements and number of LEDs