How do you restrict the current in a circuit with a resistor? LED lamp needs the current restricting to 20mA? - led work lamp
Current = Voltage / Resistance
So, if you use a 9V battery ...
20mA = 9V / Resistance
For what you need at least a resistance of 450 ohms.
Wednesday, December 30, 2009
Led Work Lamp How Do You Restrict The Current In A Circuit With A Resistor? LED Lamp Needs The Current Restricting To 20mA?
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