Today we are going to use math and science to build a rechargeable LED light. For the science part, you will need: Rechargeable Lithium Battery, 150 ohm resistor, and white LED light (from Christmas LED lightbulb). For the math part, you will need the Ohm’s Law (V=IR or R=V/I).
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Home Math Math Applications How to determine the resistor for LED light with Rechargeable Lithium Battery
How to determine the resistor for LED light with Rechargeable Lithium Battery