S
Scott Willing
Hiya folks,
We just got a cordless phone with the ubiquitous wall-wart AC adaptor.
(9V) Obviously I'm not keen to keep my main inverter running 24/7 for
the sake of this thing. I have a 12V outlet in the perfect location
but due to the telephone line positive ground issue, I can't just use
a cheap linear step-down. (Creates a permanent off-hook situation.)
I need something like an isolated DC-DC 500mA converter. 12V in, with
an adjustable output,would be great, but 12V -> 12V would do.
There are wonderful little modular PC-mount converters available but
I'm not sending Digikey $100 to fix this little problem. I didn't
spend that much on the phone.
Would be a fun project to design/build, if I had time for fun. I need
a built unit or a kit.
Meanwhile I'm going 12V outlet->cheesy 125W inverter->AC adaptor.
Works and is even pretty efficient, but... yuck!
-=s
We just got a cordless phone with the ubiquitous wall-wart AC adaptor.
(9V) Obviously I'm not keen to keep my main inverter running 24/7 for
the sake of this thing. I have a 12V outlet in the perfect location
but due to the telephone line positive ground issue, I can't just use
a cheap linear step-down. (Creates a permanent off-hook situation.)
I need something like an isolated DC-DC 500mA converter. 12V in, with
an adjustable output,would be great, but 12V -> 12V would do.
There are wonderful little modular PC-mount converters available but
I'm not sending Digikey $100 to fix this little problem. I didn't
spend that much on the phone.
Would be a fun project to design/build, if I had time for fun. I need
a built unit or a kit.
Meanwhile I'm going 12V outlet->cheesy 125W inverter->AC adaptor.
Works and is even pretty efficient, but... yuck!
-=s