My source voltage is 12 volts. LED forward voltage is 3 volts and the forward current is 20 mA. I can do the math to get the resistor values and the wattage values for the resistors. However I try, I do not know how to find the current that the array draws. I have tried Ohm's law and Watt's but I just can not come up with the array drawing 100mA from the source. Would be thankful for any and all help. This information was put into the LED.linear1.org website.
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