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There are LED's that run on AC. Remember that an LED is still a diode, and it conducts in one direction only. You can place an LED and a resistor across an AC source, and it will work, so long as you consider both the forward bias condition and the reverse breakdown voltage.
Also, there are some dual LED's mounted in one package that are wired back to back. Applying current in one direction makes them glow red, while applying current in the other direction makes them glow green. If you apply AC to them, they glow both red and green, which is yellow. (Colors, of course, vary, depending on the particular diode.) And, if you want to get fancy, you can pulse-width modulate the current and effectively modulate the color.
What else can I help you with?
How many LEDs can you run on 12volts?
The number of LEDs you can run on 12 volts depends on their voltage and current ratings. Standard 5mm LEDs typically operate at around 2 volts and require about 20 mA of current. If you connect them in series, you can run about six LEDs per series string (2V x 6 = 12V). Alternatively, you can connect multiple strings in parallel, but the total current draw must not exceed the power supply's capacity.
What kind of electricity used for LCD and LED means ac or dc?
LCDs are driven with AC, to prevent electrolytic damage to the thin transparent electrodes. LEDs are driven with DC.
Why does your car run cooler with the AC on?
ac is making fan run more
Is the long run AC curve tangent to short run AC curves at their minimum points?
do the best
Can you run a solar central AC unit?
i want to run a two ton ac with solar power
Is LED lights DOT legal in Colorado?
Yes, you can run LEDs in Colorado. There's no regulation against them.
Does a fan run on a dc current or ac current?
AC
Can you run 4 leds on a USB?
there's certainly enough power for that. Theoretically you should be able to run around 12 LED's on one USB.
Does a led light run cooler than a fluorescent light?
Yes, LEDs run cooler than fluorescent lights because they convert more electrical energy into light instead of heat. This makes LEDs more energy-efficient and reduces the amount of heat they produce.
Train runs in DC or ac?
trains can run on both ac and dc. In India trains run with dc and there is a plan to convert them to move on ac by 2010
Which is a more powerful light - 95 leds or 128 leds?
If your compairing apples to apples like 3 watt leds to 3w leds then 128. The more leds the higher the power.
Why does ac compressor run when not in ac mode. on 2000 Ford Taurus?
If you have the defroster on the ac will run. It dries the air to help clear the inside of a foggy windshield quickly.
