Sign In SHOP BLOG LEARN FORUMS 0 Items VIDEOS BREAKOUT BOARDS / PWM DRIVERS / ADAFRUIT 24-CHANNEL 12-BIT PWM LED DRIVER - SPI INTERFACE Adafruit 24-Channel 12-bit PWM LED Driver - SPI Interface TLC5947 PRODUCT ID: 1429 IN STOCK ADD TO CART 1 1-9 10-99 100+ ADD TO WISHLIST DESCRIPTION TECHNICAL DETAILS DESCRIPTION For all of you out there who want to control 24 channels of PWM, we salute you! We also would like you to check out this breakout board for the TLC5947 PWM driver chip. This chip can control 24 separate channels of 12-bit PWM output. Designed (and ideal) for LED control, this board is not good for driving servos. If you need to drive servos, we have a controller for that over here. Only three "SPI" pins are required to send data (our Arduino library shows how to to use any digital microcontroller pins). Best of all, the design is completely chainable. As long as there's enough power for all the boards you can chain as many as you'd like, like a little trail of blue PCBs stretching out into the sunset. Each of the 24 output's is constant-current and open drain. You can drive multiple LEDs in series, with a V+ anode supply of up to 30V. If you want to drive something that requires a digital input, you must use a pullup resistor from the drive pin to your logic level to create the full waveform. One resistor is used to set the current for each of the outputs, the constant current means that the LED brightness doesn't vary if the power supply dips. We use a 3.3K resistor for about 15mA but you can solder a thru-hole resistor over it if you'd like to change that value. Check the TLC5947 datasheet for details on resistor-to-current values. We include a few extras to make this board easy to use: a durable 5V low-dropout regulator (with reverse polarity protection in case y'know, you plug it in backwards), a green power-good LED, four mounting holes and a current-set resistor. A bit of 0.1" header is also included so you can solder it on and plug into a breadboard. To use: Power V+ with 5-30VDC, and connect ground to the common ground. Then send 3-5V logic SPI data on DIN (data in), CLK (clock) and LAT (latch). If you'd like to quickly turn off all the outputs, raise the OE pin - it's pulled low to enable the PWM outputs.Our Arduino library will get you started with blinking LEDs, install it and run the example code with the noted pin configuration. NeoPixel Shield & More! New Products 6/29/2013 Adafruit 24-Channel 12-bit PWM LED Driver - SPI Interface (4:59) TECHNICAL DETAILS Dimensions: 25.39mm / 0.9" x 51.1mm / 2" x 4mm / 0.1" Weight: 4.76g TLC5947 datasheet, schematics, and Fritzing Library available in the product tutorial LEARN TLC5947 and TLC59711 PWM LED Driver Breakouts How many LEDs have you got? LED Tricks: Gamma Correction RGB colors off? It's not your LEDs or code...it's biology! MAY WE ALSO SUGGEST... Adafruit 16-Channel 12-bit PWM/Servo Driver - I2C RGB 7-Segment Digit - 1" Tall Digit Adafruit 16-Channel 12-bit PWM/Servo Shield - I2C Diffused RGB 5mm LED (25 pack) DISTRIBUTORS CONTACT SUPPORT DISTRIBUTORS EDUCATORS JOBS Pig-Tail Cables - 0.1" 2-pin 4 Pack Adafruit 12-Channel 16-bit PWM LED Driver - SPI EXPAND TO SEE DISTRIBUTORS "When you make a thing, a thing that is new, it is so complicated making it that it is bound to be ugly. But those that make it after you, they don't have to worry about making it. And they can make it pretty, and so everybody can like it when others make it after you" Pablo Picasso FAQ SHIPPING & RETURNS TERMS OF SERVICE PRIVACY & LEGAL ABOUT US ENGINEERED IN NYC Adafruit (R) 4.9