By inexpensive I was thinking about $100. VG, I am going to base my design on your schematic - I'm just modelling it = now. Thank you very much you are running significant beer credits :-) DougM On Fri, Sep 30, 2011 at 12:29 PM, Spehro Pefhany wrote= : > At 01:58 PM 30/09/2011, you wrote: >>I like the idea of nichrome wire on a very large heatsink with a >>series of FETS - I've got a bunch of IRF530's in stock - I'll drive >>those against the nichrome on the same large heatsink (I've got a >>stack of old CPU sinks around) >> >>Then just run down to the auto parts store and get an ammeter - sounds >>like a great little weekend project! >> >>So no inexpensive off-the-shelf boxes that you guys know of? >> >>Thanks! >> >>DougM > > Depends on what you mean by 'inexpensive', but such boxes > start at around $400 (maybe less). We have a nice little 300W digital > one that cost less than $800- it can simulate constant current, > constant power, constant resistance, you can program it remotely > to look at PSU transient responses etc, > > Cheap like borscht- we're mostly done with fiddling around with power > resistors, heatsinks, MOSFETs and such like every time we want to > test a battery or reasonably hefty power supply. > > Best regards, > > Spehro Pefhany --"it's the network..." =A0 =A0 =A0 =A0 =A0 =A0"The Journe= y is the reward" > speff@interlog.com =A0 =A0 =A0 =A0 =A0 =A0 Info for manufacturers: http:/= /www.trexon.com > Embedded software/hardware/analog =A0Info for designers: =A0http://www.sp= eff.com > > > > -- > http://www.piclist.com PIC/SX FAQ & list archive > View/change your membership options at > http://mailman.mit.edu/mailman/listinfo/piclist > --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .