Thank you for the scheme! Are they leds in parallel right? I use the single led like if it was the only one (right?).6V - 1.8V = 4.2V / 20 mA = 210 ohm. And with this method my leds won't burn?But you know why my first method did work only for a few minutes and then burned? I need to know
But you know why my first method did work only for a few minutes and then burned? I need to know
Two things come to mind. First, 4xAA is not 6.0v .. it'll probably be over 6.5v. Not a big deal, just be aware and don't make assumptions.
Never ever seen a AA cell with more than 1,56V on it, and that's brand new ones...
QuoteNever ever seen a AA cell with more than 1,56V on it, and that's brand new ones...Well he and I are in the UK. I have a pack of batteries from a pound shop, that means that they are old or surplus stock. They are Kodak XTRALIFE AA alkaline batteries, still in the blister pack. I just stuck the probe of my meter through the packaging and measured 1.61V. It looks like you get even older batteries in Denmark.
Try replacing the batteries in your multimeter
According to datasheets from Kodak, they make no 1,6V cells
QuoteTry replacing the batteries in your multimeterThey are new and the meter is calibrated.QuoteAccording to datasheets from Kodak, they make no 1,6V cellsThat is because they are not 1.6V cells. They are 1.5V cells that have a higher voltage when they are fresh.
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