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Application of using MC68HC705J1A to drive HC05 microcontroller LED (no need to add external amplifier resistor)

  • 2013-09-19
  • 37.21KB
  • Points it Requires : 2

           This application note demonstrates how the high-current sink pins of an MC68HC705J1A drive a lightemitting diode (LED) directly without requiring an external amplifying transistor.The math used to determine the current-limiting resistor value is valid for any HC05 MCU port pin regardless of the pin’s output low current (IOL) rating. Only the maximum IOL specification need be changed in the equations

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