How to tell if a pixel is 5v or 12v?

[XmasinVancouver]

Found most of a string of pixels kind of buried in a box. The pcb itself just has ws2811 printed on it, with a + and - to confirm polarity and an arrow pointing to the green data wire to indicate direction. Other than that, I cannot see any indication whether this is 5v or 12v as I've had both over the years, and it looks like pretty much any bullet to my eyes

[DaveMcK]

Hook the string up to a 5v controller to test. A 12v string won't be harmed at 5v.

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[DrNeutron]

If you look real close at the circuit board it usually has a 12 or 5 printed on the +'ive pin. I use my phone and zoom in as much as possible with the LED light on.

[XmasinVancouver]

Hook the string up to a 5v controller to test. A 12v string won't be harmed at 5v.

Sent from my Moto Z (2) using Tapatalk

That was my idea, but when one assumes you make an ASS out of U and ME lol. That should work

[XmasinVancouver]

That was my idea, but when one assumes you make an ASS out of U and ME lol. That should work

Often that is the case as it is with some of my other pixels, but with these ones, it's actually a + over red terminal and a - over the white