[sudoroom] Adjustable DC magnets

[Anthony Di Franco]

Try to find someone with an arc welding rig, that is about what you want,
in commonly available form.
Rectifying the power coming out of the wall should be doable as well and
fairly cheaply. Keeping some of the noise from the wall might make cool
vibrating visuals in the ferrofluid context despite that it'd be a drawback
usually.
A short cockroft walton ladder is another somewhat crazier idea, maybe
useful if it can be made to produce enough current; the voltage desired is
fairly low for these so you'd probably need few stages and perhaps cheaper
components would suffice than with doing everything in one go:
http://blazelabs.com/e-exp15.asp
A high power switching DC power supply is another option but likely to be
expensive and complex to build at this power level.

On Wed, Jul 18, 2012 at 9:07 PM, Tracy Jacobs <kinetical at comcast.net> wrote:

> http://www.ohiomagnetics.com/**hddcps.htm<http://www.ohiomagnetics.com/hddcps.htm>
>
> I think they are using something like this to get these motion effects
> with the ferrofluid.  Probably expensive equipment, but maybe Patrick knows
> how to DIY it?
>
> Tracy
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