I have got a white/blue LED that draws 100mA, how long would a plain, normal, standard 9V battery be able to supply enough current for the LED to light up brightly?
And btw, what is the voltage drop over a normal led? Is the drop the same for the type of LED I've got hold of here?
I have got a white/blue LED that draws 100mA, how long would a plain, normal, standard 9V battery be able to supply enough current for the LED to light up brightly?
And btw, what is the voltage drop over a normal led? Is the drop the same for the type of LED I've got hold of here?
If a 9V is approximatly 600mAh, can you tell me what for a AA? and for a AAA ? Also, is the difference big between a alkaline 9V and a carbon 9V ? Thanks in advance,
If a 9V is approximatly 600mAh, can you tell me what for a AA? and for a AAA ? Also, is the difference big between a alkaline 9V and a carbon 9V ? Thanks in advance,
Zinc carbon batteries are really useless, have a look at these discharge graphs I plotted many years ago using two AA's and a 200mA bulb **broken link removed**.
Notice that two Duracell AA's last about 8-9 hours at 200mA.
Yes, always use alkaline batteries! - normal ones just leak and destroy things. I've just had a Sony CD/Radio/Cassette brought into work, under warranty! - he's let the batteries leak everywhere, it's full of nasty corrosive liquid - totally destroyed!. As you can well imagine, this is 'customer misuse' and not covered by warranty!.