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Author Topic: 1 Microsecond pulses  (Read 2554 times)
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Lithanial
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« Reply #15 on: October 04, 2012, 06:58:47 pm »
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Hey Mark,

Yours also works.


I am curious, did you get any overshooting with your pulse?  I was using a 60 MHz scope.
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RIDDICK
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« Reply #16 on: October 05, 2012, 02:33:30 am »
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overshooting would need some inductance or capacitance...
i think both r very little inside the MCU...

maybe the wires to the oscilloscope did it?
i had that once with a 12V power cable that was connected to a capacitor via a FET... smiley-razz
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-Arne

MarkT
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« Reply #17 on: October 05, 2012, 09:23:47 am »
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You always get ringing on an unterminated logic signal into a oscilloscope probe - add 100 ohm resistor in series with the probe to vastly reduce this.  The inductance and capacitance are stray.
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