FW: [sdiy] ±12V from +12V Linear.

[clark at andrews.edu]

>> > Have got a N.O.S 12V 1.7 Amp +12V linear open-frame PSU made by
>> Bulgin. I
>> > was wondering if it would be possible to modify it to give ±12V?

   Sorry to jump in so late in the thread...

   If you don't need a lot of current, then I would suggest using an
ICL7660S.  It's a single chip inverter (basically charges a cap and
then switches it to create a negative supply).  There are two grades,
the normal 7660 which is useful for generating -5V, and the 7660S which
will allow for -12V.  Again, won't net you much, and the noise on the
line is horrible, but it works for small load devices.

   Cheers,

   Tony

-----------------------------------------------------------------------
                         Great Lakes Modular

        Custom Design, Engineering, and Manufacturing Services
                      www.greatlakesmodular.com
-----------------------------------------------------------------------