Eric Kort wrote: > On Wed, Feb 22, 2012 at 9:24 PM, peter green wrote= : > =20 >> Nathan House wrote: >> =20 >>> Update.. >>> >>> I ended up either making a good decision or a bad decision. I was >>> watching a power supply (BK Precision 9123A, 0-30V, 0-5A) that looked >>> really nice on ebay when I first asked my question, but didn't think I >>> would end up buying it as it looked like quite an expensive one. I >>> bought it. Unfortunately I went way over budget and paid $191.27 with >>> $26.83 shipping, so $218.10 total (yikes!). I guess it's worth it if >>> it's something I'll use for a long time, though. Here a a few >>> pictures: >>> >>> http://www.roboticsguy.com/uploads/gallery/album_17/gallery_1_17_134741= ..jpg >>> What do you think? >>> =20 >> There are two things I don't like about it. >> 1: It's only single output, IMO a bench supply should be dual output as >> many analog circuits need both positive and negative supplies >> 2: It doesn't have binding posts. I want to be able to stick bare wires >> on my PSU directly without having to worry about fitting connectors firs= t. >> >> For a general lab power supply i'd much rather have dual outputs and >> binding posts than programability and super accurate output voltages. >> =20 > > I'm a little confused (not hard to do). Yes, it says single output, > but it has +, -, and ground connectors. So if it is set, say, to 25V > as shown in one of the figures, it would also supply +12.5V and -12.5V > relative to the ground connector, right? > > Pretty! > > -Eric > =20 Afraid not. The DC output is floating relative to AC ground (3rd=20 prong) The GND connection is just so you can tie the DC to AC ground. Kerry --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .