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

Bill,
  I'm sure the supply is not at fault.

  The outputs on the Prop-SX Controller are open-collector.  They can only connect to ground or be open.

  So you must connect the + side LED (or whatever you are controlling) to the V+, and the minus side to the screw terminal (don't forget a resistor too).

Bean.

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