[sdiy] Running off a DC insted of AC 'wall wart' Any issues i should be aware of?

[Julian]

Thanks a lot for the info.

> Of course if the rectifier is set up to do +/- VE via half wave
> rectification from the AC source, you are stuffed.

In which case, its likely that id have seen no action at all when i tested
the device briefly with the 9v DC supply, right?

Anyway, the only regulator i could spot was an L7805CV, for which i looked
up, and it appears to be +ve only, so, i believe im clear on that point.

> If you have a bridge
> recitifier in there, the 0V line internal to the sequencer will be 0.6
volts
> above 0 volts, meaning that plugging it in to anything on the same
> accumulator that uses true zero, will result in power flowing through the
> signal wire shields.

Im pretty novice, and this i understand less of.  As far as i can spot,
there is only one single diode anywhere near that area of the pcb.  There
are a couple of resonably sized capacitors (470uf, 35v), i presume for
smoothing, and an 275 VAC, 0.22uf.

Would i be wrong to assume that the middle leg of the regulator would be an
ok place to test for the 0.6v?  If so this, and indeed all other points that
i guessed should be 0v were.

Does this meen im home and dry on this one?

Thanks, Julian