Editing Talk:Basic Circuit Building Blocks
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Additionally a current limiting resistance in the base is needed, this value is chosen to provide enough current to saturate when the transistor is passing its maximum current. Without the resistance your poor PIC port pin is effectively shorted to ground via diode. | Additionally a current limiting resistance in the base is needed, this value is chosen to provide enough current to saturate when the transistor is passing its maximum current. Without the resistance your poor PIC port pin is effectively shorted to ground via diode. | ||
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