[KwartzLab] DC-DC Converters

[Bob DeGregory]

Isotopes? No problem, roll your own.

Not quite an instructable, but a good read. Dunno if its at local library
tho'

http://www.amazon.com/The-Radioactive-Boy-Scout-Frightening/dp/0812966600/ref=sr_1_1?ie=UTF8&qid=1348168608&sr=8-1&keywords=radioactive+boy+scout


On Thu, Sep 20, 2012 at 12:57 PM, doug moen <doug at moens.org> wrote:

> I just re-read Snow Crash (it's the 20th anniversary), and the nuclear
> powered rail gun in that book is pretty sweet. However, the radioisotopes
> you need for thermoelectric generators are freaking expensive. United
> Nuclear charges $79 for 0.1 microcurie of Strontium 90, and you need a lot
> more than that to power a rail gun. (Sr90 is 300 curies per Watt.) So I'm a
> bit stymied on this one.
>
> However, I agree that we do need more devices that require 20,000+V in a
> bank of capacitors to fire up. The large Tesla coil at Communitech last
> week had almost exactly this requirement, and it was pretty sweet.
>
>
> On 20 September 2012 12:14, Bob DeGregory <bob.degregory at gmail.com> wrote:
>
>> I'm a bit old-fashioned, preferring mechanical or chemical power sources
>> for my ballistics. However, nuclear might be cute.
>>
>> On Thu, Sep 20, 2012 at 11:41 AM, Karl Williams <karlw at thinkbotics.com>wrote:
>>
>>> So true LOL. That reminds me that I need to build another coil gun...
>>>
>>> > I think Karl is hinting that you should be using a higher input
>>> voltage.
>>> > I'm pretty sure he doesn't respect any electronic device that doesn't
>>> > require 20,000V+ in a bank of capacitors to fire up ;)
>>> >
>>> > Ben
>>> >
>>> > On 9/20/2012 11:33 AM, Bob DeGregory wrote:
>>> >> Thanks Karl,
>>> >>
>>> >> But it looks like EMCO is great for step-up. I perused about a dozen+
>>> >> of their lines but I can't find anything they offer for step-down.
>>> >> Everything seems to be HVDC output. Maybe that's why they call
>>> >> themselves EMCO High Voltage <snort>
>>> >>
>>> >> So I'm still lookin'
>>> >>
>>> >> On Thu, Sep 20, 2012 at 11:09 AM, Karl Williams <
>>> karlw at thinkbotics.com
>>>  >> <mailto:karlw at thinkbotics.com>> wrote:
>>> >>
>>> >>     I've used products from Emco for high voltage applications and the
>>> >>     modules
>>> >>     are reliable: http://www.emcohighvoltage.com/
>>> >>
>>> >>     > I'm fixin' to use Li-ion tool batteries to drive a variety of
>>> >>     loads so I
>>> >>     > need DC-DC conversion with variety of load characteristics and
>>> >>     output
>>> >>     > voltages (obviously not all at once from single device).
>>> >>     >
>>> >>     > This one on Amazon looks interesting:
>>> >>     >
>>> >>
>>> http://www.amazon.com/Voltage-Step-Converter-Module-Waterproof/dp/B008IWEF1C/ref=sr_1_6?s=electronics&ie=UTF8&qid=1348150933&sr=1-6&keywords=dc+dc+converter+12v+5v+20a
>>> >>     >
>>> >>     > Any experience with unit referenced above?
>>> >>     >
>>> >>     > Any alternative recommendations for similar device?
>>> >>     >   I like input voltages that range from say 9VDC up to as high
>>> >>     as 40VDC
>>> >>     >   I like local or at least North American availabilty not drop
>>> >>     ship from
>>> >>     > China
>>> >>     >   I need 12VDC and 5VDC output probably up to about 3A
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