Let us talk about LED circuit

Let us talk about LED circuit

Let us talk about LED circuit

In electronics, the basic LED circuit is an electric power circuit used to power a light-emitting diode or LED. The simplest such circuit consists of a voltage source powering two components connected in series: A current-limiting resistor (sometimes called the ballast resistor), and an LED. Optionally, a switch may be introduced to open and close the circuit. The switch may be replaced with another component or circuit to form a continuity tester. where to buy cheap LED Strip? Lightereryday is a good choice.

(Although simple, this circuit is not necessarily the most energy efficient circuit to drive an LED, since energy is lost in the resistor. More complicated circuits may be used to improve energy efficiency).

The LED used will have a voltage drop, specified at the intended operating current. Ohm's law and Kirchhoff's circuit laws are used to calculate the resistor that is used to attain the correct current. The resistor value is computed by subtracting the LED voltage drop from the supply voltage, and then dividing by the desired LED operating current. If the supply voltage is equal to the LED's voltage drop, no resistor is needed.

This basic circuit is used in a wide range of applications, including many consumer appliances. recommend directory: LED Strip RGB Amplifier.

Polarity

Unlike incandescent light bulbs, which illuminate regardless of the electrical polarity, LEDs will only light with correct electrical polarity. When the voltage across the p-n junction is in the correct direction, a significant current flows and the device is said to be forward-biased. If the voltage is of the wrong polarity, the device is said to be reverse biased, very little current flows, and no light is emitted. LEDs can be operated on an alternating current voltage, but they will only light with positive voltage, causing the LED to turn on and off at the frequency of the AC supply.

Most LEDs have low reverse breakdown voltage ratings, so they will also be damaged by an applied reverse voltage above this threshold. The cause of damage is overcurrent resulting from the diode breakdown, not the voltage itself. LEDs driven directly from an AC supply of more than the reverse breakdown voltage may be protected by placing a diode (or another LED) in inverse parallel.

The manufacturer will normally advise how to determine the polarity of the LED in the product datasheet. However, these methods may also be used. recommend directory: 8 Keys RGB RF Controller.

POST COMMENT

5 Licensed Electrician Tips for Safety at Home All About Health And Safety Training Courses Why do you need safety glasses at work? BlackBerry phones- QWERTY comes to quicken your electronic communication Electronic Health Records – Reasons To Move Forward With Implementation 3 Fundamental Safety Measures For the Internet Hosting Records Air News On Learning To Fly: Circuit Work,tHe 'first' and 'second' Nature By Johan Lottering Electronic Air Cleaners - The 5 Major Types Online training for food safety Important Factors That Should be Considered Prior to Purchasing an Electric Radio Controlled Boat Online Radio – Use It to Listen to Top 40, or Any Other Type of Music! Online Radio – 4 Benefits to Tuning In Electronic Medical Records and Patient Safety