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Right, complete novice, so be gentle lolConflicting stories? I've read you don't need resistors, then you do, even a 5.1 Zenner diode was mentioned, don't run em in series etc. etc. I have 2 flashing Red LEDs & I want to run em off a 9v battery.......Do you run em in series or parallel?Do I need a single resistor or a resistor for each of the LEDs, if so, what resistors?RegardsTony