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What is the minimum voltage necessary to operate a light emitting diode?
Wiki User
∙ 6y ago
That will vary with the type (i.e. "color") of the LED: IR LEDs operate at the lowest voltage (1.2V), red LEDs operate at low voltages (1.8V), green LEDs operate at medium voltages (2.5V), blue LEDs operate at high voltages (3.3V), and UV LEDs operate at the highest voltages (4V). Intermediate color LEDs operate at correspondingly intermediate voltage between those given above. The reason an LED cannot produce light below these voltages is it takes more voltage drop to get the energy to produce higher energy photons and the different types of binary semiconductors needed to produce each color/energy of photon result in different junction forward bias voltages.
However LEDs are really current operated devices, not voltage operated devices, so they need a series resistor or a current source to limit the current through them. Simply applying a voltage source with the necessary "minimum operating voltage" across an LED will generally destroy it instead of lighting it.
Wiki User
∙ 6y ago
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When a light bulb is rated for 3.2 V does that mean that is the maximum operating voltage OR the minimum operating voltage OR or the optimum operating voltage?
When a light bulb is rated for 3.2 V it means that it is the maximum operating voltage to be applied to the bulb.
Can you connect a 277V ballast to 208V line service?
No. A 277 volt ballast needs the correct voltage to operate. The 277 voltage is derived from the star point voltage of a 480 volt three phase system (277/480). The 208 voltage is a three phase line voltage whose star-point voltage is 120 volts (120/208).
What is break down voltage?
A rectifier diode normally allows current to pass in one direction (the forward direction), and almost no current in the opposite direction (the "reverse" direction). The diode is designed to work up to a certain voltage; if more than a certain voltage is applied in the reverse direction, it will "break down", and suddenly a large current will flow. This can irreparably damage the rectifier diode, unless it is of a type specifically designed to operate in the breakdown region - i.e., a Zener diode.
Can you run a 100 watt bulb with low voltage cables?
The cable voltage is set by the voltage of the supply and not by what is connected to it. But a 100 watt amplifier on a 120 v supply would draw less than 1 amp even at high volume.
What is the difference between line voltage and low voltage?
Answer for USA, Canada and countries running a 60 Hertz supply service.Line voltage is a term that is used to describe the voltage that is used to operate a specific device. A service that comes into a building would be considered line voltage. For a Class 1 circuit the top voltage for low voltage installations is 30 volts at 1000 vA. For a Class 2 circuit the top voltage for low voltage installations is not under 30 volts and not over 60 volts at 100 vA. Voltages used above 750 volts are considered high voltage installations.
What is the minimum voltage necessary to operate alight emitting diode?
1.7V.
My car is running bad could it be the coil?
It is possible that it is not producing the voltage necessary to operate vehicle properly
What is the voltage in a 2000 Ford Explorer?
Hi, The normal voltage to have the vehicule to properly operate has to be a minimum of 12.6 volts. When checking the voltage at the battery when the engine is running, except to have about 14.4-14.6 volts.
what does led stand for led?
Light Emitting DiodeLight-emitting diode - a semiconductor that glows when a voltage is applied
When voltage regulation will be zero it operate it?
A transformer will operate with a voltage regulation of zero when it is not supplying a load.
When transformer voltage regulation will be zero it operate at?
A transformer will operate with a voltage regulation of zero when it is not supplying a load.
What is and LED?
Light-emitting diode, a semiconductor diode that glows when a voltage is applied.
What semiconductor diode glows when voltage is applied?
Light Emitting Diode or LED
How do you know if the LED is working?
LED stands for light emitting diode. If it is polarized correctly, and working correctly, it will be emitting light. If it is burnt out, or voltage has been applied backwards to it, it will not.
What is mean by thresold voltage?
the device oprates on the minimum voltage. in this voltage is called threshold voltage.
What jobs dose a battery do in the circuit?
The purpose of the battery in a circuit is to wive energy to the circuit
Break down voltage?
The breakdown voltage of an insulator is the minimum voltage that makes it partially conductive electrically. On the other hand, the breakdown voltage in a diode refers to the minimum reverse voltage to cause it to conduct in reverse.
