[ILUG] OT: stepping down from 12v to 9v

[Brendan Kehoe]

This is very OT, but I don't know of other lists that might be as useful
for this sort of thing. :)

We're trying to find an easy way to convert a 12v DC current to 9V DC
for a community wireless broadband scheme.  We've got a tiny Ethernet
switch that wants 9V, but a 230->13.6V transformer, who has two contacts
(+13.6V, and a ground).  A junction box feeds one device, a WRAP board,
that wants 12V.  But the switch wants 9V.

I found that a 3.1V zener diode would do the job, but a) I've found no
one in Ireland who sells them, and b) it would require a bit of a
hardware hack to put it together which doesn't feel like it'd be the
safest approach.

Anyone know of a device already available that would take a 12V DC
signal (like comes in a car's 12V adapter) and step it easily down to 9V DC?

Feel free to reply off-list to reduce traffic, and I'll post a summary
later.

Thanks for any tips,
B