I have some assorted led's, lots of colors.
What value resister do I add in the circuit with 12 VDC?

"Rich" wrote in news:Tvydnbf-
:

I have some assorted led's, lots of colors.
What value resister do I add in the circuit with 12 VDC?





Use ohms law. Most LEDs are rated around 20 ma. Personally, I like
to limit them to around 5 - 10 ma. Experiment to see what brightnes
level is acceptable to you. I have ones functioning at only about 2 ma.


Ed K7AAT

It depends on the Vmax of each led....
Some led's have a higher/lower Vmax than others, it depends on
manufacture/color, or both.... Figure 20ma to be safe, and an
average of 3.0v per led...

You should be able to figure it from there...

Rich wrote:
I have some assorted led's, lots of colors.
What value resister do I add in the circuit with 12 VDC?



--
Bob N9LVU

Calculate to get a feel for the correct value, then use a resistance
substitution box...or a pot to come up with a suitable value.
....Dave

"Rich" wrote in message
...
I have some assorted led's, lots of colors.
What value resister do I add in the circuit with 12 VDC?