Yes Excellent.
This is exactly the stuff he is looking for. Then he pulls the 120/240v switching power supply and installs DC-DC. THe likely won't fit in his case. Next if he has maybe of the external enclosues which come with a wall wart then he is more than 1/2 way there. He needs to match the power output of the wall wart and that should be going into some sort of DC-DC regulator to power his equipment. I would think its right off the shelf because many need mobile offices which need to run in cars and campers. Any of the big RV stores should be able to help. A couple years ago I spoke with Novak RV and they said they have solutions. But I think they might be running inverters - which in this case likely make no sense. Still the way the DC-DC transformer might work would be just a switching power supply to chop the incomming DC current same as the AC power supplies chop the incomming AC current. Then at very high frequencies its easy to get the right voltage and smooth it back out. http://www.hardwaresecrets.com/article/327 http://en.wikipedia.org/wiki/Switched-mode_power_supply Note his 24V power is "nominal" 24V. It can be anything from 0-24V if the battry is undervolt (going flat because he is discharging it to run his gadgets) to a normal 26.4 volts to over 28 volts if there is a charger on it. So his power supply must clean this up. He should make sure he has the MOV's in the circuit as well but I'm not sure about them in a DC application. He can still get spikes! On Fri, Jul 22, 2011 at 03:07:52PM -0600, Hendrik Schaink wrote: > Do you mean DC-DC type pwer supplies? Take a look here: > > http://www.mini-box.com/DC-DC > > Hendrik > > > I am in the market for a harddisk storage device of some sort (like > > Drobo Qnap FreeNAS) > > that takes 24V dc in (max) no 110V available. > > > > Has to have 500GB or 1TB storage and an ethernet connection so I can > > give it an IP address. > > (Pref linux based) > > > > Like a freeNAS type of thing ... > > > > I could take probably one of those mini-itx ones and shove 2 disks in it > > and install freeNAS... > > > > But wonder if something exists off-hte-shelve ... > > > > > _______________________________________________ > clug-talk mailing list > [email protected] > http://clug.ca/mailman/listinfo/clug-talk_clug.ca > Mailing List Guidelines (http://clug.ca/ml_guidelines.php) > **Please remove these lines when replying _______________________________________________ clug-talk mailing list [email protected] http://clug.ca/mailman/listinfo/clug-talk_clug.ca Mailing List Guidelines (http://clug.ca/ml_guidelines.php) **Please remove these lines when replying
