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How to Build a Simple LED Circuit

This article tell how to make simple circuit for LED light.

LED is small special light that shine when to get electricity.

This project show how to join some parts together to make LED turn ON.

LED circuits used in many things like torch (flashlight), car back lights and even in big signboards!

Circuit Working:

Parts List:

ComponentQuantity
Resistor 470Ω1
LED any 5mm, 20mA1
Battery 9V1

How to Connect LED with Battery Circuit:

Here we explain some examples of LED circuits like blinking LED 220V LED and more.

First we will show simple LED circuit with one resistor in series works.

To choose correct resistor one must do small math to know the following:

With this one can find good resistor value so LED works safe and does not burn.

Formula and calculations for a series LED circuit :

Source Voltage−LED Voltage Drop/Amps = Ohms

where:

Amps = mA/1000

For instance: Source Voltage = 9V

LED Voltage Drop = 3.1V typical for a blue or white LED

Desired Current = 13 milliamps

So, the resistor needed is calculated as: (9 to 3.1) / (13/1000) = 452Ω

thus a 470Ω resistor should be used.

How to Build:

To build a LED circuit with a resistor in series is mentioned below:

Find Resistor Value:

Connect the Parts:

Test the Circuit:

Fix Brightness if Needed:

Make it Strong:

Final Test:

Note:

How to Build a 220V LED circuit:

A 220V LED circuit is setup with some electric parts to make LED work from 220V power.

This kind of circuit are used in places where light plug give 220V like some countries have that high voltage.

Circuit Working:

Parts List:

ComponentQuantity
Resistor
10Ω 1/4 watt1
Capacitor
PPC 0.1µF 400V1
Semiconductors
LED any 5mm 20mA1
Zener Diode 2.7V 1W1

LED Circuit Work on 220V Warning!:

Do this only if anyone knows good about electronic stuff.

This circuit connect direct to 220V power.

Very dangerous can give big shock.

This uses parts like one capacitor, one zener diode, one resistor and LED.

How big the capacitor is will decide how much current will LED need

For example 0.1 microfarad (µF) capacitor give around 4 mA to LED.

If use 470 nano farad (nF) then LED get about 20 mA.

How to Build:

To build a Simple LED Circuit one need to know the working with 220V is very risky.

One must handle with care and follow safety rules.

Building the Plan:

Safety First:

Connect the Parts:

Test the Circuit:

Fix Problems:

Finish the Job:

Final Safety Check:

Note:

Conclusion:

To conclude this How to Build a Simple LED Circuit overall give useful and low power way to make light in many kinds of electronic things and system.

References:

Calculate series resistor value for LED on 220 Vac RMS supply

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