Dumb question, sorry!

Ahead92 · Jun 9, 2011

I am sort of new to LED'S and I just have a quick question. I want to power 2 white 5mm LED's (7000mcd, 3.3v to 3.6v max, 25Ma) I have a nine volt battery and I was wondering how to connect the LED's up to the power source. If I wire the LED's parallel then do I add the volts of the lights up or do I still select a resistor for the 3.3 volts? Sorry for such a novice question but thank you for the help.

Andrew

bbawkon · Jun 9, 2011

wire them in series with the battery and a dropping resistor..
Batt+ -> Resistor -> LED1 -> LED2 -> Batt-

When wired in series, you add the voltages (6.6V) and do nothing with the current (25mA) (m for milli, M for mega - you've specified a 25 MEGA AMP LED.. I want one

)
when wired in parallel, you do nothing with the voltage (3.3V) and add the current (50mA)

9V Supply, 25mA, and 6.6V Load gives you about a 100 Ohm resistor.

Ben

jason 77 · Jun 10, 2011

Yes what Ben said above, if you aren't familiar with ohm's law then you can use this website....

http://led.linear1.org/led.wiz

Dumb question, sorry!

Ahead92

Newly Enlightened

bbawkon

Newly Enlightened

jason 77

Enlightened

Similar threads

Latest posts