28 May
2009
28 May
'09
1:54 p.m.
bfranchuk at jetnet.ab.ca wrote:
... VT6 ...
PPS ... Now why did he not design it to use a 9 volt AC wart ...
Well you might be able to use an AC wall wart - the reverse polarity
protection diode will serve as a half wave rectifier, but you'll probably
want a bigger filter cap than the one that's already on there. Just make
sure the trough of the ripple stays above 8V so that the 7805 doesn't lose
regulation.
And you can of course use a 12V (DC that is) wall wart, but just watch the
temperature of the 7805. A heat sink would help a lot, but there's not much
room for one.
Bob