How to build an LED light

Written by lawrence stephens
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How to build an LED light
A simple LED light circuit is good practice for future electronic circuit building. (led image by sasha from

Building a simple LED light can be a great project for kids or adults just learning electronics. An LED light can be built using a simple circuit with an LED, a resistor and a battery. Once the LED light is soldered together, it can be placed in virtually any plastic case that has room for the battery and an opening for the LED light. The resistor is used to regulate the flow of current through the LED. Too much current can permanently damage the LED.

Skill level:

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Things you need

  • LED
  • Push button switch
  • 9V battery holder
  • 9V battery
  • Soldering iron
  • 1K ohm resistor

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  1. 1

    Attach the red lead of the battery holder to one end of the 1K ohm resistor.

  2. 2

    Solder the free end of the resistor to the positive lead of the LED. The positive lead of the resistor is usually longer than the negative lead.

  3. 3

    Wire the black lead of the battery holder to one lead of the push button switch. Solder the other push button lead to the negative side of the LED.

  4. 4

    Connect the battery to the battery holder. Press the push button switch, and the LED should light up.

  5. 5

    Disconnect the battery, if needed, in order to mount the LED light into your chosen container.

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