Simple USB Lamp Circuit

Do you know that your computer USB port have stable 5 volt dc voltage? Yes your computer USB is a very useful voltage source to light up a bright white LED which is very useful for many purposes. Many times we want to look in our CPU but due to low light inside we cannot able to

Privacy Policy
Copyright 2013 CircuitDiagram.Org. All rights reserved.

Electronics Beginner Guide Tutorials


Audio Circuits

Power Supply Circuits

LED & Light Circuits

Battery Chargers

Radio & RF Circuits

Telephone Circuits

Test & Measurement

FM Transmitter Circuits


Related Circuits

12V LED Lamp Circuit

Simple USB Lamp Circuit

230 Volt LED Lamp Circuit

LED Night Light / Lamp

Lamp Flasher Circuit

Joule Thief

Dark Detecting Circuit

Light Sensor Circuit

Dark Activated LED Blinker

Sound Activated LED Flasher Circuit

LM3909 LED Flasher

Simple 555 LED Flasher
see it clearly and we have to take it to below the room light from its original place. But by this simple USB lamp you can able to easily see inside of CPU or you can also use it for other purposes like you can see keyboard keys in the dark etc. The circuit is so simple uses only one 47 ohms resistor, LED and USB type "A" male plug. The 47 ohms resistor is used to limit the current to 25mA and it is ideal for operating a bright white LED. You can easily connect this circuit to any extra or scrap USB cable you have. 

Sponsored Links
Circuit Diagram