LED & Resistor help..
I was wondering if someone could help solve my problem as follows. I shall make as much detail as possible:
I am running 12 (5mm led) in parallel of 3 in series. (So four rows of three leds)
The Manufactors spec is
Forward max Voltage = 4v
Forward max current = 100mA
Power Dissipation = 100mW
So by my calculations (which may be wrong) it would require 1ohm, 1/4W resistors?
However with all the above been used the last LED in each series of three has blown.
Could anyone explain why or give advice please.