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Lithanial
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Re: 1 Microsecond pulses
#15
Oct 05, 2012, 01:58 am
Hey Mark,
Yours also works.
I am curious, did you get any overshooting with your pulse? I was using a 60 MHz scope.
RIDDICK
Guest
Re: 1 Microsecond pulses
#16
Oct 05, 2012, 09:33 am
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...
MarkT
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Re: 1 Microsecond pulses
#17
Oct 05, 2012, 04:23 pm
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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