[JohnH]

Originally Posted by netwolf

I got this but yest to use it
http://jaycar.com.au/productView.asp...UBCATID=999#12
It was on special in December i think around 100$.

Just make sure you test it before use. I am not an electrical engineer but if I understand it right and the frame ground is floating you might be in trouble. This setup is common in Lab power supplies apparently. For astro use where you have multiple PSUs and voltages around and interconnected (ie Laptop, ccd, focuser, fwheel, usb etc) I think you need to be very careful of floating ground PSUs.