Wednesday, October 1, 2008

LED-Circuit

LED circuit
Simple LED circuit diagram




In electronics, the basic LED circuit is an electrical circuit used to power a light-emitting diode (LED). It consists of up to four components connected in series: a voltage source, a current limiting resistor, a LED, and optionally a switch to open and close the circuit. The switch may be replaced with another component or circuit to form a continuity tester Two diodes may be placed in parallel in the circuit, but connected anode to cathode; the second diode may be used to protect the LED against reverse bias, which can damage the LED, or it may be another LED which is illuminated when the polarity of the voltage source is reversed.

The LEDs used will have a forward voltage specified at the intended operating current. When the voltage source Ohm's law is used to calculate the resistor that is used to attain the correct current.[4][5] The resistor value is computed by subtracting the forward bias voltage from the supply voltage, and then dividing by the desired operating current.
This basic circuit is used in a wide range of applications, including many consumer appliances.

The formula to use to calculate the correct resistance for resistor to use is:

RESISTANCE(Ohms) =
(POWER SUPPLY VOLTAGE-LED VOLTAGE DROP)/LED CURRENT RATING


where:
Power supply voltage is the voltage of the power supply (such as a 9 volt battery)
LED voltage drop is the voltage drop across the LED (typically about 1.7 - 3.3 volts; this varies by the color of the LED)
LED current rating is the manufacturer rating of the LED (usually given in milliamperes such as 15 mA)

4 comments:

Gkon Electricals & Electronics Pvt. Ltd. said...

Led Light Manufacturers- led lighting manufacturers in India .Gkon offers you best led light manufacturing and provide electrical switch accessories, led light, fixtures, VPIT Ballast, MCB's, distribution. boards, AC boxes, plugs sockets, wire and cables etc.

LED Tube said...

LED Light
LED Lights
led lights for home
LED Tube
LED Bulbs
led bulbs lamps
T8 LED Tube
led fluorescent tube replacementLED Light
LED Lights
led lights for home
LED Tube
LED Bulbs
led bulbs lamps
T8 LED Tube
led fluorescent tube replacementLED Light
LED Lights
led lights for home
LED Tube
LED Bulbs
led bulbs lamps
T8 LED Tube
led fluorescent tube replacementLED Light
LED Lights
led lights for home
LED Tube
LED Bulbs
led bulbs lamps
T8 LED Tube
led fluorescent tube replacement

led pcb said...

Well I am really happy to read this post, I totally I agree with you. I like it very much. I will keep your new articles forever.
pcb manufacturing

vini light said...

Very impressive blog .LED Light manufacturers and suppliers - Delhi/India based LED Light wholesale Exporters and provide quality many kinds of LED Downlights lights products. Our strong believe in the Moto reflects in punch line "BIJLEE BACHAYE ROSHNI BADHAYE" Feel free to call us + 011 65194474, 011 65394474 and visit : LED Light Manufacturers India