ComputerVoltageSources

If you only want to supply pads, thats okay, but PLEASE supply the
pads, polyswitches and diode locations for all 3 voltages.  It should
be very easy to make all of the boards switch between using the +15
w/a regulator and using +5 direct by choosing between the regulator
and parts or the polyswitch and parts.  I will point out that more and
more +5v components are showing up in our analog systems and probably
has a lot to do with MOTM moving to a 6 pin conector and a 3 voltage
supply.

Larry T.

--- In ComputerVoltageSources@yahoogroups.com, Harry Bissell Jr
<harrybissell@...> wrote:
>
> Damn good idea.
>   
>   The polyswitch fuses can also improve on-card
>   power supply filtering (by being slightly resistive)
>   and cause a softer start on the power supply.
>   
>   H^) harry
> 
> Grant Richter <grichter@...> wrote:          Here is a practical idea.
>   
>   You have three pads labeled +V, Ground and -V. These go to
resetable polyfuses and 
>   1N4001 diodes to protect the circuitry in case the 12 year old
science fair student hooks 
>   something up wrong. 
>   
>   direct link to schematic:
>   http://www.blacet.com/techPS.gif
>   
>   From John Blacets fine technical page.
>   
>   http://www.blacet.com/tech.html
>   
>   Then the end user can wire up ANY kind of connector he wants to
hook up to those three 
>   pads. 
>   
>   The 1/3 square inch of board spaced used can substitute for the 2
square inches of board 
>   space it would take to support every possible connector type that
will probably change or 
>   go obsolete anyway, and who has all the mechanical drawings need
to make the custom 
>   PC board connector footprints? And who is going to take
responsibility for everything 
>   being correct with each connector type, and what if the
manufacturer changes the pinout 
>   or adds something new??????
>   
>   Just take an existing "fill in the blank" system power cable, chop
one end off and solder 
>   the appropriate three wires to the three pads on the CVS board and
be done with it.
>   
>   --- In ComputerVoltageSources@yahoogroups.com, "John Loffink"
<jloffink@> wrote:
>   >
>   > Good point.  Here's what could be supported based upon PCB
stuffing options:
>   > 
>   > Synthesizers.com 6 pin 0.100"
>   > MOTM/Blacet 4 pin 0.156" add 5 V regulator
>   > MOTM 6 pin 0.156"
>   > Modcan 3 pin 0.156" add 5 V regulator
>   > 
>   > Any others?
>   > 
>   > John Loffink
>   > The Microtonal Synthesis Web Site
>   > http://www.microtonal-synthesis.com
>   > The Wavemakers Synthesizer Web Site
>   > http://www.wavemakers-synth.com
>   > 
>   > 
>   > > -----Original Message-----
>   > > From: ComputerVoltageSources@yahoogroups.com
>   > > [mailto:ComputerVoltageSources@yahoogroups.com] On Behalf Of
Larry T.
>   > > 
>   > > I would like to suggest that, if at all possible, we include
both the
>   > > Blacet/MOTM 4 pin +/-15v power connector. and the Synthesizers.com
>   > > +5/+/-15v 6 pin connector.  The board could allow for the
optional +15
>   > > to +5 regulators when using the 4 pin connector.  Some of us
already
>   > > have +5 in our systems, and generally, no matter how much
ANYTHING you
>   > > come up with will use (short of a room heater), the +5v supply is
>   > > never anywhere near being used to it's rated output.  I note
that some
>   > > of the newer MOTM boards also use a seperate +5v supply.
>   > > 
>   > > I bring this up in part because of the LED/LCD/VFD
discussions, and
>   > > partly because the MPU in consideration has requirements for
+5v, and
>   > > I really don't want to add more +15 to +5 regulators to my already
>   > > stressed out +15v supply, when I have 4-6A of un-touched +5 just
>   > > sitting around asking to be used.