![]() DIY Layout Creator offers freeware for designing layouts and is great for learning.Therefore, the anode ( Long Leg) should be toward the positive terminal. Current must enter the LED through the anode and exit through the cathode. On some LEDs, the cathode side of the LED has a flat edge. The long wire is called the anode, and the short wire is called the cathode. Experimentalists Anonymous allows you to make your own layouts from dozens of schematics. The LEDs in your kit have two terminal, one short and one long.Common Cathode need to have +5V switched for each anode, a bit harder to do. ![]() The CATHODE (-) of the LED is connected to ground and our LED lights up. We supply +9v (or whatever DC voltage we are using for our effect) into a current limiting resistor which connects to the ANODE (+) of the LED. Need 3 control transistors for one RGB LED. unwired, so let’s use that to create an LED indicator. The cathode of the LEDs need to be brought to GND to turn on the particular colour. For an LED to work and emit light, one wants the current to come out of cathode, which is the pointy end in the figure. Common cathode means that the cathodes of all of the LEDs are common and connected to a single pin. Common anode RGB LEDs are easy to work with. ![]() One can see that, the cathode is where the CURRENT comes out of the device. For charging a battery, the positive terminal becomes the anode. Ray Wilson's contributions to the DIY community are too many to count. For discharge, the positive terminal is the cathode.
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