Are they more than just LEDs? Some show they have built in resistors (attachment). I can see those with low voltage (3.5 V or so) as just being LEDs, but my question is concerning those 12 V or 24 V modules. The "12 V" say they work of 9 to 12 V. Do they have a built in regulator? The data sheets just don't say much.
Does anyone have experience and insight on these things?
Does anyone have experience and insight on these things?
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