I recently bought some LED reflector spot light bulbs. They were fairly cheap compared to most I've seen around in other places, I paid £3.50 a bulb. The only problem is, I don't have very much information on them.
They are marked:-
MR16+c (which is miniature reflector, the size, + cover)
- Vdc white
- mcd.
They draw around 75mA at 12V and there are 20 LEDs in the case. I've taken one up to 15v briefly, it does brighten, and draws 180mA.
BUT, and here is the important bit, there is NO polarity on the pins. Yup, they go in either way to a DC power source.
I know that there is some electronics inside the casing, but I can't see it, and I'm not about to sacrifice a bulb (yet) to have a look.
Has anyone used these or know anything about them, I was hoping some clever person on here could shed some light on these (groan!). I'm particularly interested to know if there is some form of overvoltage protection built in. I'm intending to run them from my battery which is being charged by the windmill.