resistor help

[Jason-Tank]

which one of these is for the 5v regulator and led from madvapes? theres 2 to choose from at The Source
#1

#2

thanks ppl

 

[Rocketman]

Calculate the current that will be going through each resistor and multiply that times the voltage applied.

For Example, if you put a 470 ohm resistor in series with a 2 volt Red LED, across the 5 volt output of the regulator, then the resistor will drop 3 volts by itself. 3 volts divided by 470 ohms gives a current of 6.4 milliamps. The power dissipated by the resistor will be 3 volts times 6.4 milliamps for 19.2 milliwatts. That's about 1/52 of a watt, a lot less than 1/8 of a watt.

 

[Jason-Tank]

im a rookie man please can you tell me which , its the standard led u get from madvapes and the 5 volt boxmod circut

 

[Rocketman]

im a rookie man please can you tell me which ,

I did

The 1/8 watt will be fine. and smaller than the 1/4 watt. Great that you are buying an assortment. A lot of folks buy one LED, one resistor, one this, and one that, plus shipping.

Don't hook the LED up backwards.

 

[Jason-Tank]

The 1/8 one also works for the 5volt setup rite? Because i bought the component seperate and forgot to get resisters for the and i know the kit comes with a resister to solder onto the pcb ..?? Please and thanks

 

[Rocketman]

will be fine