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Bench top power supply....
Posted: Mon Aug 11, 2008 4:07 pm
by george graves
I'm about to buy this:
http://www.powersupplydepot.com/product ... t=14603+PS
Is there something better I should be looking at?
Re: Bench top power supply....
Posted: Mon Aug 11, 2008 5:55 pm
by ababkin
what voltages/currents are you looking for?
i plan to make some power supplies based on LM2678 (5A), they have 3.3, 5, 12 and adjustable Voltage versions - get these chips for free as samples from National (i think)
it looks like a nice unit tho if you have spare $100
Alex
Re: Bench top power supply....
Posted: Mon Aug 11, 2008 7:46 pm
by davebmw
Looks like a nice PSU I had a look at Rapid electronics they do Mastech PSU's.
That looks to be a great price too!
Re: Bench top power supply....
Posted: Wed Aug 13, 2008 2:32 am
by thebigmacd
Personally, I tend to use surplus ATX power supplies. For adjustable I have a +15 -15 dual rail power supply I built for a class in college.
Re: Bench top power supply....
Posted: Wed Aug 13, 2008 10:41 am
by Fred
I wonder if I can dig up a photo of the power supply that I have (had at least) from the Auckland University Nuclear Physics Particle Accelerator that got ripped down to make way for more software engineering rooms. It's not overly powerful, but it's very cool :-)
Other than that I have a "12" Volt system that puts out about 50 Amps continuous with a 1 Farad cap box built from 10 100,000uF 40WV caps for automotive stuff. And probably a lot of others that I can't think of :-)
Fred.
Re: Bench top power supply....
Posted: Wed Aug 13, 2008 11:28 am
by Fred
Couldn't find a pic of the old school supply, but I found my big thumper :
http://i238.photobucket.com/albums/ff26 ... -mk1-1.jpg
http://i238.photobucket.com/albums/ff26 ... -mk1-2.jpg
The little cap is so I could use it for light jobs without the BIG cap network attached. The heatsink has 2 big 35 amp bridges wired for internal parallelism (matching junction drops on in a batch) one for each output of the transformer. It was/is an awesome setup :-)
http://i238.photobucket.com/albums/ff26 ... cs-etc.jpg
Oh yeah, forgot about those ones :-) I have 5 variacs too, 3 500w and 2 300w. Genuine British ones :-)
All scored for free. Shame about the particle accelerator though :-( RIP.
Fred.
Re: Bench top power supply....
Posted: Wed Aug 20, 2008 9:22 am
by george graves
That is impressive. I have nothing against building a PS from scratch - but I just have too many unfinished projects as it is - last thing I need is to be banging my head against the wall with another one.
I'm building some custom automotive gauges (volt, AFR, ect) so I want something with a real nice fine (and course) adjustments voltage wise to calibrate them with.
I went ahead and ordered it. It will get here Thursday - I'll let you know what I think of it.
George Graves
