what is going on here

147

01:44:48

the shift register halts when a D Flipflop !Q output is sourcing more current than the chip can provide

published 10 years ago

roops1967

10 years ago

Hmm...?

mbrown

10 years ago

Depends on the internal modeling of the shift register, but it works if you increase the load resistance. Possibly it's breaking because of too much current through the output.

hurz

10 years ago

Probably there are two 10Ohm, one in plus power supply and one in negative. This would explain this side effect. 10ohm is definitive the output resistance but were it/they placed is not clear to me.

faceblast

10 years ago

aha! that makes sense. added some switches to show the effect

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