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current spectrum

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current spectrum

Postby risting » Mon Feb 06, 2012 4:54 pm

One of the things I would like to see with my new picoscope is the current waveform when plugging in some modern equipment like a LED lamp, i e to the 230 V 50 Hz net.
I am thinking about soldering a dirty little 1 ohm resistor right onto a male plug, to be able to watch the voltage drop across this series resistor with an ordinary probe.
Question: is this stupid?
I cannot damage the scope because of some ground problem, can I? The scope is USB powered so not connected to ground, right?
Is it stupid anyway not to buy a current probe instead? If so, why?
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Re: current spectrum

Postby Martyn » Mon Feb 13, 2012 3:09 pm

Please use a current probe.
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