Every led has a different forward voltage.
Here is a chart with rough indications of the forward voltage sorted on color:
The link comes from the EDUCYPEDIA page on leds:
Over there, there is also a page with circuits idea's:
You don't have to know everything, if you know where to find it.
When you do ask questions, you may look stupid.
When you do NOT ask questions, you will STAY stupid.
It would be nice to have the Timezone ( GMT +/- x ) in the location field in the profile.
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