quattro digest, Vol 1 #2998 - Radio Power w/battery disconnect

[l.leung at juno.com]

Assuming that the cigarette lighter is non-switched, supplying the lighter =
with a power plug that has a 12 source in it would keep the radio memory. I=
t would actually be interesting to see if the electronic memories (and cloc=
k and ECU memory) could be supported by something easier, say 9V or if need=
ed, two 9V in parallel. If so, run to Radio Shack, buy one of those cigy li=
ghter sockets and a couple of 9V battery snaps and a couple of 9V batteries=
, wire the ground (cigy lighter shell half) of the 9V to negative of the 9V=
's, the center to the + side, voila!, non-volatile radio memory when you ne=
ed to pull the battery. Total cost, about $5. Of course, the question is, w=
ill 9V hold the memory?

Note, be careful if this is the set-up. Until the battery is disconnected, =
it will TRY to re-charge the 9V batteries at 12V. This may cause a problem =
for 9V batteries that can't be recharged. Too bad there aren't any small 12=
 batteries that have a little real current (photo batteries just don't have=
 enough).

LL - NY