Quoting Vern Jones <soundres@FOOTHILL.NET>:

> Jai Dhar wrote:
> >
>
> >
> > 1. What is the best way to cut metal for creating jacks such as mains
> > receptacle jack
> Chassis punches are nice, but a nibbler will work..
> >
> > 2. Short-circuit protection - is there a relatively simple method I can
> use
> > for protecting my power supply from being short circuited?? I have
> reversed
> > GND and Vcc in the past before, so I thought this might be a good idea to
> > implement.
> Use inline protection diodes and color code Vcc and GND.
> > 3. One of my regulators is a linear type (the +12v), and boy does it tend
> to
> > heat up fast!
> Lower the input DC voltage, use a generous heat sink with heat sink
> compound or heat conducting thermal washer. Use the 3A TO3 version if
> you are pushing things to extremes and really need a linear supply. Use
> a switcher....

This is the last bit of info I need clarified. What are some common heat sink
compounds that I can find in stores? Are there different grades that I should
be looking at? What characteristics are typically associated with these
compounds. And as for the regulator, I don't need a linear one, but it's all I
know how to work with. Fortunately, the MAX787 is a nice +5V SMPS regulator
that was easy for me to implement, so I used that for my +5 side... I couldn't
find anything for +12V tho. Are there any out there?
>
> Use an IEC power receptacle that has a built in line fuse and power
> switch, only 1 square hole to cut.
>
> Fuse all of your power supply output voltages between the regulator and
> the load.
> Use the smallest size that will supply the load plus about 10% and you
> shouldn't blow up the supply again..
>
> In addition to the Nibbler, a good set of Files and Drills help as well,
> if you have access to a school electronics lab or sheet metal shop, a
> shear and brake will let you cut and form the sheet metal.
>
> Vern
> >
> > Any other suggestions will be greatly appreciated. Of course, don't feel
> the
> > need to answer all of these - I know I have a lot to ask. I figured it
> would
> > be better to get it out all at once since I have been noting down these
> things
> > as they come to mind.
> >
> > Thank you all!
> >
> > Jai
> >
> > ----------------------------------------
> > This mail sent through www.mywaterloo.ca
> >
> > --
> > http://www.piclist.com hint: To leave the PICList
> > mailto:piclist-unsubscribe-request@mitvma.mit.edu
>
> --
> http://www.piclist.com hint: To leave the PICList
> mailto:piclist-unsubscribe-request@mitvma.mit.edu
>




----------------------------------------
This mail sent through www.mywaterloo.ca

--
http://www.piclist.com hint: To leave the PICList
mailto:piclist-unsubscribe-request@mitvma.mit.edu