In SX Microcontrollers, SX/B Compiler and SX-Key Tool, bean wrote:

Nick,
  Right two in series connected to 12V. You don't need a driver chip. The STP16C596 IS the driver chip. So you would have +12V going to 2 of the LEDs in series, then right into the STP chip. It basically acts like a shift register with constant current sink capability. It also has a single resistor to set the sink current of all outputs. It's a great chip for controlling LEDs from voltages higher than +5V.
Bean.

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