Creating Pixel LED Using TM1809

TM1809 is a 9 output RGB LED drive IC , which means single IC can drive 3 RGB LEDs.This IC consists of data latch , signal reshape and high voltage driver circuits. It can be used for outdoor large-screen and color dot-matrix control applications.Since it can control 3 RGB LEDs at the same time ,this IC is useful when you want less components and more LEDs in your system.

Creating a Pixel LED Using TM1803 / TM1804

TM1803 is a 3 output RGB LED drive IC which consist of  MCU digital interface, latch , signal reshape and high voltage driver circuits.Through networking ,it can achieve outdoor large-screen and color dot-matrix control . It can support up to 24v RGB LED drive circuits .TM1803 supports up to 256 level gray control.It has  a Built-in RC oscillator, signal clock synchronization. While accepting the completed data of this module, data can be auto-shaped and transmitted to next chip through data output pin.

Creating a Pixel LED using WS2821 IC

 

WS2821 is a 3 channel constant current output RGB LED drive IC,which adopts two wire communication. WS2821 have power supply voltage stabilizing circuit, time base circuit, a signal decoder block, data buffer and  built-in address storage circuit.WS2821 have three independent output driven channels, These each individual pin operate at constant current about 19mA, which also can be set using a resistor up to 60mA maximum current. 

Creating a Pixel LED using WS2811 IC

The WS2811 is a 3 channel output IC specially designed for pixel LEDs .It includes an intelligent digital data latch port and a signal reshaping and amplification circuit.It also have a precision internal oscillator and  a 12V voltage programmable constant current output drive circuitry.To reduce the power supply  noise , the 3 output channels designed with delay turn-on function.   

 

Building a Pixel LED Tutorial

Pixel LED is a LED that can Illuminate any color within the RGB color schemes at a given time.The basic RGB LED have a common pin and three other pins for red ,green and blue color anodes or cathodes. If you want to generate a color you need to apply voltages to each RGB pin depending on the RGB color ratio.If the LED is a common Anode the common pin needs to be connected to the (+) positive terminal of the power supply.If its a common cathode the common pin needs to be connected to the (-) or the ground of the power supply .eg- If you need the white color to be Illuminate , You have to apply same voltage level to each R,G and B pins, like wise if you need yellow color , give same voltage to the R and G pins and no voltage at B pin.The voltage level decides the brightness of the Illuminated color.But this method of driving pixel LEDs complicated when it comes to controlling multiple RGB LEDs. That's where the pixel led drive IC's comes to play. using these ICs You can drive given amount of pixel LEDs with only three or four wires.Another benefit of using these ICs is that you can decide the each color with numeric values ( 0- 255) . You can connect these pixel LEDs to the Pixel LED controllers and create animations or videos with the help of software like [ LEDEdit ].