I have about 40 12v LED's. I know I could just go buy a 12v power supply, but I was wondering if there was a way I could use some of my massive supply of AAA, AA, C, D, and lantern batteries to get 12v's to power them. Hook them up in series maybe? Any advice would be most welcome, thanks!
They came from china in packs of 20. They say "12v" on the package. I tried connecting them to a AA 1.5v battery and not even a faint glow. Guess I'll just have to wire up a series of 8 batteries and see what that does! Thanks alot!
They already have 6 inch red and black wires coming out of them... i assume that means they already have a built-in resistor? And they are blue and white LED's, 12v, not incandescent. What's the best way to power these? I want to either wire them in series to make a christmas ornament, or to make a big-ass flashlight for fun
Have a look at the heatshrink first and see/fell if there is a very small resistor under there, and if there is see how close to the led its soldered as if theres enough of the led leg left you can simply unsolder the resistors.
So what's the best way to power these for a super-bright ornament to outshine my neighbors, or a super-bright flashlight to blind them when their dog pisses me off
Why do you think that cheap Chinese LEDs will be super-bright?
They are probably dim old LEDs that are in a narrow beam because the case focusses the beam. It they don't point directly at you then you can barely see them.
Well I guess I'll find out huh? In the meantime, can someone PLEASE answer me the battery question? Assuming these are very bright, what's the best way to power them for retina-melting candlepower?
They will soon burn out if the cheap Chinese LEDs are bright.
But then, my son recently bought a little Chinese "flashlight" at The Dollar Store for $1.00. It has one white LED and is powered from three 1.5V button battery cells with no current-limiting resistor. It has Velcro that wraps around your finger and it shines where you point your finger.
It is very bright but I don't expect it or the tiny battery cells to last long.
I have about 40 12v LED's. I know I could just go buy a 12v power supply, but I was wondering if there was a way I could use some of my massive supply of AAA, AA, C, D, and lantern batteries to get 12v's to power them. Hook them up in series maybe? Any advice would be most welcome, thanks!
Yes you can connect 8 ea of the AAA,AA,C,or D's in series to get 12V. The life of the batteries will depend upon the current drain by the LED's Some lantern batterys are 1.5V,6V or 12V.
If the package of the LED's is marked 12V then they should light up with 12V applied. Hopefully the wires for the LED's are marked + and - and the LED's have to have the right polarity of voltage applied.
As Audioguru mentioned too much voltage can burn out the LED's if the voltage is to high, so preceed with caution.
Yep i tested them and they're PERFECT! I just used a 9v battery to test one. It was very bright, pure white color. I imagine they'd be even a little brighter with 12v instead of 9v. Hopefully they don't burn out too fast but hey, they were cheap as dirt and they're very bright and clear white. Not all things chinese are bad
Now, help me figure out how to totally pimp out a razor scooter or a power wheelchair till it's practically street-legal and super-dangerous