Thinking of using one of these temp sensor/displays:
http://tinyurl.com/jzrmp5n


Would need a 30mA DC supply ... 12-24V

Anyone know of small low cost DC supply modules ? ..........

I have a draw full of psu's ... laptop, router etc, I could use one of
those but as it only needs 30mA something small will be easier to house
in an existing box.