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    68 x LED projects and circuits

    Browse through a total of 68 led projects.

    Arduino RGB LED Color Wand Here is an artistic Arduino project for the fun-minded. The circuit is an Arduino RGB LED controller running on a sweet ‘n’ simple code,but with a little hardware surprise outside the Arduino board. You can add a bit of luxury to your aquarium or flower vase using this digital color wand! Here, D11-D10-D9 pins of...
    LED Constant Current This is a very simple led constant current design using only 2 transistors, 2 resistors and an LED. This circuit allows you to use any voltage between 2V and 24V to drive almost any type of LED with power consumption up to 5W. The T2 transistor can be BC547 if you use only usual leds (the 20mA versions) but it is recommended...
    LED at 220V Circuit LED has become more and more popular for use as light indicator because of its low cost and long life. Unfortunately the LED works only at low voltages and even then you need to use a resistor in series. It is not a good idea to limit the current at higher voltages using a resistor because the dissipated power will be too high...
    Portable LED Lantern This circuit is a simple emergency light with 20 “white straw hat” LEDs. One advantage of this little circuit is that we can use any ordinary 5VDC mobile phone charger ( or a 5V solar panel) to recharge the internal storage battery. Typical specification of a generic “White Straw Hat” LED (these LEDs are widely used in chinese...
    LED Solar Lantern Lights Circuit of the LED solar lantern lights presented here is built around one 6V/1W Solar Panel (PhotoVoltaic Panel) and a 4V/800mAh Lead-Acid Battery. Here, commonly available 5mm White Straw Hat LEDs are used as the light source. how does the solar lantern circuit works DC 6V supply from the solar panel is fed to the...
    White LED Night Light White Light Emitting Diodes recently available can be used as a powerful alternative to incandescent lamps in lighting applications. Today’s White LEDs are less expensive, draw much less current, and project a fairly well focused beam. Described here is a simple circuit of an efficient White LED Night Light which can be...
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