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ADAFRUIT 24-CHANNEL 12-BIT PWM LED DRIVER - SPI INTERFACE - TLC5947, ADAFRUIT 1429

  • Zaloga GALAGO: DA, 3 kos/ov
    Zaloga DOBAVITELJ: DA, 56 kos/ov
  • Dobava 7 dni
  • Znamka: ADAFRUIT
  • Id številka: 536/55
20,35 €

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 (Adafruit 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. Adafruit 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.

 

Adafruit 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. Adafruit Arduino library will get you started with blinking LEDs, install it and run the example code with the noted pin configuration.

 

 

 

 

Specifikacije

Glavno

Processor
Broadcom BCM2837B0, Cortex-A53 64-bit SoC @ 1.4 GHz
Memory
512MB LPDDR2 SDRAM
Connectivity
2.4 GHz and 5 GHz IEE 802.11.b/g/n/ac wireless LAN, Bluetooth 4.2/BLE
Access
Extended 40-pin GPIO header
Video & sound:
1 × full size HDMI

Dimenzije

Dolžina
99 mm
Širina
207 mm
Višina
208 mm
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