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If you connected neutral and earth (ground) to each lead in an LED and it glowed then this would be evidence of a ground fault.
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When a pencil led connect to a circuit whether the bulb glow?
Yes it will - graphite is a conductor.
Can a CMOS gate adequately drive a common LED?
You will have to check the datasheets for both the CMOS gate and the LED, then if the CMOS gate's rated output current is enough to light the LED you will need to do a little arithmetic using Ohm's law to calculate the resistor to put in series with the LED to limit current and avoid damaging the parts.
Where should a resistor be placed when using an LED?
In series with the LED. The value would be whatever it takes to obtain the required voltage and current across the LED. As an example, if you had an LED that required 25ma at 2v, and you wanted to use a 9v battery, you would need a resistance of 280 ohms. (This is (9-2) / 0.025, a simple application of Ohm's law.)
What type of diode produces light when properly biased?
That would be an LED or Light Emitting Diode an LED is a light
What does a circuit board look like?
A circuit board consists of numerous electronic components, depending on the application, these components can be in the thousands or in the ten's, therefore circuit boards vary in numerous sizes, all connected using very fine electrical connection strands.
How do you test for a digital signal?
using LED.when the signal is 1,then the LED glows,but when signal is 0,then it does not glow.
How do you make a led glow by the help of battery?
Connect one wire from the LED to each of the terminals on a battery - provided the battery has enough power, the LED will glow !
What happen in realization of not gate transistor?
When we give the input the circuit becomes open and LED will not glow when there is no input then due to +5 V , LED will glow
How does an ice bulb work?
The led glow when it is attached to the batteries.
Will a infrared led kept in sunlight glow or not?
There is no such thing as and an infra-red LED. Nor will an any LED glow without a power source. That power may come from a solar cell but an LED (Light Emitting Diode) emits light it does not collect light energy.
Why does an LED glow even when its switched off?
- Even when a LED lamp is completely disconnected on one side, it can still glow. If the switch is situated between the neutral line of mains and the lamp, there will be a 60Hz voltage difference between the conductive parts of your fixture and the surroundings. These surroundings have a potential (earth) close to the neutral line of your mains supply. There is a small parasitic capacitance between the wires of the lamp and the surroundings. This will conduct a small current. This current will not flow through the return line of your mains, and is not detected by a Watt-O-meter. A LED lamps needs very little current to start emmiting light , a current of 100uA can already be visible in dark conditions. Possible solutions: - Set the switch in the other Phase of mains. - Use a double pole switch and disconnect both phase and neutral. - Attach a small load parallel over the LED lamp. A 100K resistor might do the Job . Warning: Do not modify your electric wiring unless you are both skilled and qualified for this !
When a pencil led connect to a circuit whether the bulb glow?
Yes it will - graphite is a conductor.
How do you glow led bulb from aluminium air batteries?
first we want to take an aluminium tin then connect it to the bulb
How can you glow a LED by suppling 220V AC?
take a look at this circuit looks to be exactly what your looking for http://www.turbokeu.com/myprojects/acled.htm
Why is there no LED's that run from AC?
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.
How might you distinguish a sodium vapor streetlight from a mercury vapor streetlight?
Mercury vapor streetlights, used since the 1940s, glow a greenish white. Sodium vapor streetlights, which have gradually replaced most of the MV streetlights in the US, glow orange. Another two, metal halide and LED, glow completely white.
What led to the idea of using postage stamp?
what led to the idea of usingpostage stamps
