Handy Bench PSU’s

I thought everyone was going with cheap PC based power supplies(I did), but some people just have to take it to another level. [andrew] built this bench PSU with -12V, -15V, +5V, +12V, +15V, variable and one +35VDC unregulated output. He based it on this design, but added a few tweaks of his own.
Yes, Hack-A-Day took a bit of an unplanned hiatus on Saturday, but I’ll have some extra stuff for you this week as things return to normal. If you’ve got something interesting, use the tips line.

11 thoughts on “Handy Bench PSU’s

  1. a. #5, the plastic on the led meters looks tacky but makes it much easier to read. overhead fluorescent lighting and the fact that each led segment that is off is white in color makes it very hard to read in normal conditions.

    b. i don’t understand, #4, i’ve hosted from my home for years. hackaday has linked to hacks hosted right here on at home many times in the past with no problems (that I have heard of). right now i’m able to connect just fine away from home, but if there *are* problems please email me.

  2. nice psu, with one big caveat. still bugs me, keep seeing psu’s up on hackaday with *no current limiting*. seriously, why is no one implementing it? it really isn’t that hard. also, keep seeing designs (like this) using the old LM7xxx series of linear regulators. would like to see some designs using smps regulators. then you won’t have to worry about all that heat when going from 35V to 5V (14% efficiency means lots of heat). makes me laugh, psu drawing less than 1A requiring *that* much heatsinking.

    oh well, time for a new project.

  3. #8, I await your design. :) Seriously, I just learned about SEPIC topology and when I take my electronic training-wheels off, I plan to build a number of SEPIC-based power converters for various applications.

    In the meantime, if someone with the requisite skills wants to take that ball and run with it, I think it’s really an underutilized technology that hobbyists would enjoy. Particularly if the control function can be done with an ATtiny13 and offboard FETs instead of some dedicated chip.

    Why do hobbyist supplies always stop at 30 or 35 volts? That’s such crap. There’s plenty of fun gear in the 48-volt range, and powering it is a pain!

Leave a Reply

Please be kind and respectful to help make the comments section excellent. (Comment Policy)

This site uses Akismet to reduce spam. Learn how your comment data is processed.