tim writes: > I saw a website on putting 12v into the DWL-900 ( a 5v recommended > system ) here: > http://www.ralphfowler.com/links/dwl900.html > > I can't tell if the 12v is going into the system through a lot of > ethernet, or if, with the power regulator he's talking about, that you > can actually put 12v into the power port of the system.
That page says: Power is regulated by AIC1563CN Supply voltage: 30V; versatile DC/DC converter. Specs say it takes 3-30 volts in 1.5 amp out with no heat sink http://doc.analog.com.tw/ap_note_pdf/an004.pdf So yes, ignoring losses in the Ethernet cable (which are NOT inconsiderable at that current draw), it's getting a significant fraction of 12 volts; certainly more than 5. > I have a field station I'm making all inside a pelican. I'd be psyched > to be able to use my 12v battery to power the station. Right now, I'm > using 3 7805 5v regulators to give it power, and it creates both a lot > of heat, and a lot of loss. It would. You can't connect multiple 78XX regulators together. Each of them tries to regulate the voltage to a slightly different level and they fight each other, generating a lot of heat and ... a lot of loss. -- --My blog is at angry-economist.russnelson.com | Can I recommend python? Crynwr sells support for free software | PGPok | Just a thought. 521 Pleasant Valley Rd. | +1 315 268 1925 voice | -Dr. Jamey Hicks Potsdam, NY 13676-3213 | +1 315 268 9201 FAX | -- general wireless list, a bawug thing <http://www.bawug.org/> [un]subscribe: http://lists.bawug.org/mailman/listinfo/wireless
