How do you identify common anode and common cathode RGB LED?
- Use a multimeter in continuity mode.
- If the LED lights up with the red tip on the longest lead and the black on one of the other leads – you have a common anode RGB LED.
Thereof, how do you use a common anode RGB LED?
Connect the Common Anode of the RGB LED to Digital Pin - 8 on the Arduino UNO. Connect the 3 cathode legs to 220 Ohm resistor and diode as shown in the circuit diagram. The anode of the diode should be connected to the resistor. Connect the diode legs to ARDUINO UNO Digital Pins- 5, 6 and 7 respectively.
In this way, what is a common anode led?
Common anode means that the anode (positive) side of all of the LEDs are electrically connected at one pin, and each LED cathode has its own pin. Common cathode means that the cathodes of all of the LEDs are common and connected to a single pin.
High-side (anode) drivers are more expensive, so the number of them has to be minimized. If the digits are not multiplexed, common cathode is better. If the digits are multiplexed, and there are less than 7–8 digits, common cathode is better. With more than 8 multiplexed digits, common anode is better.