There is a very informative channel on youtube, which teaches about various
problems in electronics. This video mentions the earth-to-clip connection
and shows the result of forgetting about it. I highly recommend watching
his videos, you can learn much about safety while having a good laugh
The probes themselves cause few problems, especially when in 10X/100X mode,
because they generally present a high-impedance load on the circuit.
Ground-clips/leads are what cause you nightmares and can lead you in the
wrong direction when debugging noise issues, including ringing. Be aware
Yes, my scope can calibrate probes. I was actually reading the manual this
morning! I should probably set aside some time to go over it!
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As long as there is a standard BNC connector on your scope, just about any
probe should work.
I bought some cheap ones on ebay for about $10-$15 a few years ago, and
they work fine. You wont need an expensive probe for 20Mhz; you do need to
compensate the probe with a decent square-wave. Most,
