katrah
Newbie level 4
I'm very new to electronics. I would like to build a simple solar panel rated at 12 volts 3 watts to light 4 LEDs. Each individual LED is rated at 3.4-3.6 volts 350 mA. My intent is to wire the LED's in series making them a total of about 3.5 volts 1.4A. My reason for this is so that the LEDs begin to dim on/off under even very low lighting conditions.
So if I'm doing my math right this setup should look like this:
R = [12v -3.5v] / 1.4A = 6.07 ohms
At 6.07 ohms resistance under max lighting conditions from the solar panels, I shouldn't need a resistor, am I correct? At what point would one want to use a resistor with LEDs? And is there anything else I'm not considering with this design that my newbie self is unaware of?
So if I'm doing my math right this setup should look like this:
R = [12v -3.5v] / 1.4A = 6.07 ohms
At 6.07 ohms resistance under max lighting conditions from the solar panels, I shouldn't need a resistor, am I correct? At what point would one want to use a resistor with LEDs? And is there anything else I'm not considering with this design that my newbie self is unaware of?