How to Connect an Led?


LEDs emit light when an electric current passes through them. The first step is figuring out the polarity of the LED##which wire is the anode (+) and which is cathode (-). Usually the two leads coming off of the LED will be different lengths and often the longer lead is the anode. Unplug the USB and any other power source. Make sure you have the voltage select jumper for this bank set to 5V. Connect the cathode side of the LED into the Ground connector on the Output side of the board. Do this by screwing the stripped wire connected to the LED into the appropriate screw terminal. Connect a resistor to the anode wire coming from the LED.  The value of the resistor is not critical, but depends on the voltage you're powering your LED with.  A resistor value of 330 ohms usually works for 5V, and 234234 ohms is usually fine for 12V.Most LED come connected with resistors so you can skip this step. Connect the positive lead (anode) to the Out0 connector on the output side of the board.  You can use any of the outputs you like, as long as it is on the same terminal, and all above directions are followed. Connect the cathode (black wire) to ground, and connect each of the anodes (yellow wires) to an output. Connect each of the yellow wires into a different output on the same terminal (for example OutO, Out1, Out2, & Out3) If you want them to turn them on and off independently. If you want any of them to work together, two or more anode wires can be connected to the same output.
Q&A Related to "How to Connect an Led"
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