bitem2k
New Member
Hi all, sorry if this is a stupid question.
I have googled and searched the forums here but i just cant find the answer.
When working out the voltage drop over one of two resistors I use the following calculation:
R1hm:/RTotalhm: * Vin
This is fine if im just using two resistors.
But If instead of having two resistors, I have one resistor and a LED.(Please see the attached image.)
I need to calculate the amount of voltage that will flow through the LED, but i dont know how to calculate this as i dont know the resistance of the LED, and for some reason i cant get an acurate reading from my multimeter.
thanks for your help.
I have googled and searched the forums here but i just cant find the answer.
When working out the voltage drop over one of two resistors I use the following calculation:
R1hm:/RTotalhm: * Vin
This is fine if im just using two resistors.
But If instead of having two resistors, I have one resistor and a LED.(Please see the attached image.)
I need to calculate the amount of voltage that will flow through the LED, but i dont know how to calculate this as i dont know the resistance of the LED, and for some reason i cant get an acurate reading from my multimeter.
thanks for your help.