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50pc-Worldsemi-WS2803D-18-Channel-RGB-Constant-Current-LED-Driver-DIP-WS2803-PWM
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50pc Worldsemi WS2803D 18-Channel RGB Constant Current LED Driver DIP;WS2803 PWM

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nooelec (16903 Yellow Shooting star icon for feedback score in between 10,000 to 24,999)
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US $57.95
Approximately C $58.94
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Item location:
Niagara Falls, New York, United States
 
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Description Shipping and payments
Item number:
150694775827
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Last updated on  May 13, 2013 11:39:52 EDT  View all revisions

Item specifics

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NooElec

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50pc Worldsemi WS2803D 18-Channel RGB Constant Current LED Driver DIP;WS2803 PWM







Product Details
Manufacturer Worldsemi
Model WS2803D (WS2803)
Quantity 50

Technical Details
Datasheet
Package Type
 DIP-28
Number of Pins
 28
Supply Voltage
 3.3V - 5.5V DC
Output Current
 5-30mA / channel

Product Information
Open-source AVR studio library will be available soon!
(targeted towards our ATmega32U2-based NooGroove boards sold in our store)

WS2801 libraries meant for Arduino, such as this one, can be used with some minor modifications as well since the data scheme is very similar.

A very useful IC, providing a low-cost way of driving RGB LEDs. 

There are 18 8-bit channels per WS2803, so they are capable of driving 6 RGB LEDs with full 24-bit colour goodness. 

WS2803 are meant to control common anode RGB LEDs.  We have both diffused and clear lens types of RGB LEDs available which work great with this controller.

WS2803 can be operated in both constant current and constant voltage modes.

They employ a 2-wire serial data connection, similar to SPI or I2C.  ICs are chained together which means whole strings can be controlled using just 2 pins on your microcontroller. 

Data is clocked in starting with the MSB of the red gray scale data and ending with the LSB of the blue gray scale data.  See picture below for details.  Plenty more information available in the datasheet.



We have found these ICs are sensitive to power supply issues, so don't forget to add a decoupling capacitor between Vcc and Gnd pins.  Although specified for a 25MHz clock we'd recommend clocking in data at <2MHz, especially for longer strings.

Features:
  • Supports both constant voltage and constant current drive mode
  • Constant output current range
    • 5-30mA@5V supply voltage
    • 5-20mA@3.3V supply voltage
  • 18 constant current driving channels
  • 30V high voltage output channels
  • 8bit PWM gray level control
  • Precision output driving current
  • Between channels in a chip: ±2 %
  • Between chips: ±4%
  • Maximum clock frequency up to 25MHz.
  • Free run ability
  • Over temperature protection

    • We ship worldwide for most items! Contact us for shipping costs if unavailable in listing.
    • We ship via UPS at cost! Contact us for a rate quote or check UPS.com.
    • Items will be shipped within 2 business days.
    • We only accept PayPal for payment.
    • Applicable sales tax will apply to orders shipped within Canada.


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    Return policy details
    NooElec is now proud to offer a 14-day no-questions-asked return policy. There are a few caveats to note: 1. Buyer is to pay all shipping charges. 2. For 'free shipping' items a 20% restocking fee will apply. 3. Items must be returned in the same condition as it was shipped. DOA items are excluded from these rules and will be exchanged or replaced free of charge as always. The above policy DOES NOT APPLY to items specified as 'as-is' in the auction listing.

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