For connecting LEDs first of all it is require to know their connecting points or connection polarity clearly. The picture shown below is describing the poliraty of a LED...
Small two transistor LED blinker circuit. This circuit can be made from your junkbox. This circuit is good as attention getting device. The circuit uses two transistors NPN 3904 and PNP 3906 which are easily available in markets....
A very useful project of a 12V LED Lamp circuit. This led circuit is very simple consist of 5 resistors and 15 super bright white 5mm LEDs ...
The circuit use 13 bright LED's to make a good looking rainbow type effect. Operatign voltage is from 6 to 12 volts, the circuit also uses a low dropout voltage regulator LM2940T-5.0...
Very simple and small LED flasher circuit uses only two components with LM 3909 IC...
Here is a simple LED night light circuit which can be used as a room night lamp. The circuit is simple and can be built with few components...
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