Looking for the smallest size battery to run 1mm LED. If it can run for more than 6 hours it would be fine. Any alt configurations would be helpful.
2007-09-18 09:49:24 · 4 answers · asked by Anonymous in Science & Mathematics ➔ Engineering
Most small LED's have a forward voltage in the 2V range, so the 1.4V battery probably won't run it. If you only want to use one battery, check here for a circuit using a single 1.2V battery to operate an LED. Of course, now you're adding a couple of resistors and a transistor, so if the goal was keeping the cost down or not having many components, that's no good.
http://www.quantsuff.com/
Good luck!
2007-09-18 11:45:30 · answer #1 · answered by Jay 5 · 0⤊ 0⤋
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2016-09-03 08:12:15 · answer #2 · answered by ? 3 · 0⤊ 0⤋
Red LEDs typically have a forward voltage drop of greater than 1.5 volts -- some of them upwards of 1.8 to 2 volts, so that battery probably won't be able to light up the LED.
If your particular LED has a low forward voltage drop (1.5 V), and if the battery does happen to light up the LED (by connecting the LED straight to the battery without any resistor in series), it won't be too bright, and I doubt the battery would last for 1 hour.
If you use 2 batteries in series and a resistor in the range of 200 to 300 Ohms (in series), then you should be able to get 6 hours of light.
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2007-09-18 11:28:47 · answer #3 · answered by tlbs101 7 · 0⤊ 0⤋
In tinnitus, the sounds a person hears are actually perceptions. Since there's no actual source, they are often referred to as "phantom noises". I read that about 8% of all people in the US suffer from tinnitus so you are not the only one who hears these strange noises.
Tinnitus is actually not a disease. It is actually a symptom of a problem that is rooted deep, somewhere within your body. The problem could be a simple one like an infection in the ear, or even simpler, such as ear wax. Just clear the wax and get the infection treated, and the noises could go away. In some people, it could even be the result of a side-effect of a drug they took. Or it could be more complicated.
If you want to know more about this condition and wnat to learn how to solve naturally your problems with these annoying noises you should read this ebook: http://tinnitus.toptips.org
It helped me a lot.
2014-09-24 10:44:48 · answer #4 · answered by Anonymous · 0⤊ 0⤋