Rgb Led Schematic Symbol. This reference design showcases a solution using a 48 channel led driver tlc5957 to drive a 10 16 full color r g b led matrix with a 1 10 multiplexing rate. The circuit diagrams or schematics that follow are drawn using industry standard electronic symbols for each component.
Sometime the diode symbol creates confusion too identifing a led s the cathode and anode of a led is very easy by looking inside. Because in a 12v led strip there are 3 leds and a resistor in series supplying 11v instead of 12v is a bit like reducing the voltage for each led by 0 25v. The rgb led we are using is a common cathode led.
Each led in a section is a 5050 tri color type containing a red green and blue led.
The led symbol is the standard symbol for a diode with the addition of two small arrows denoting emission of light. For the common cathode rbg led one pin is ground pin 2 and the other 3 pins are the anodes of the red green and blue led. Because in a 12v led strip there are 3 leds and a resistor in series supplying 11v instead of 12v is a bit like reducing the voltage for each led by 0 25v. So for identification led s comes with a unique way to identify its terminals as anode or cathode.