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

The usual way is to use a common BJT driving the gate of a MOSFET.  The base of the BJT is connected to the SX, the MOSFET switches the +12v to your anodes.  There are some resistors involved too.  Sorry I don't have the exact details, but you can find loads of circuits with a google search like "switching 12v with 5v TTL"

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