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Old 08-28-2009, 03:54 AM
poynt99 poynt99 is offline
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Join Date: Jul 2009
Posts: 378
Your 555 timer is running at about 431kHz.

The 5MHz showing on the 0.25 Ohm timer shunt is just noise. It's doubtful there is any real 5MHz component anywhere in the circuit wave forms.

The "below zero" analysis is not necessarily correct. The load wave form is with the probes across the load as you stated, not with any reference to ground. Measurements need to be made to the same reference as the battery to know direction of the current.