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7 segment reverse voltage

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2012-08-22
2013-05-30
  • David Stephenson

    I am about to connect three 7-segment LEDs to a 16F88. I am worried that the maximum absolute reverse voltage allowed on the segments is 3.3V.
    Does the GCBasic routine connect the cathodes to positive to turn off a display element? In which case I could be exceeding the 3.3V, or does it make the cathode pin an input to turn off the display (which should be ok).

     
  • David Stephenson

    Excuse my stupidity. I will of course need to use a transistor on the cathode because of the current (from up to 7 segments).

     

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