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On 15/06/2013, Gordon Henderson <gordon+lug@xxxxxxxxxx> wrote: > > Really for TomB, but for anyone needing 5v off batterys, then use an SMPS > regulator rather than a bog-standard 7805... I've used these: > > http://uk.farnell.com/xp-power/sr10s05/switching-regulator-5v-1a-o-p/dp/1861095?Ntt=sr10s05 > > but there are many others. Just search ebay if that's your thing. Also > looking on the mobel radio-control/robotics sites for something called a > BEC or UBEC - does the same thing - provides 5v from batterys via a > swsitching regulator, so low-loss (ie. doesn't get hot enough to burn > fingers!) > > > Gordon > > -- > The Mailing List for the Devon & Cornwall LUG > http://mailman.dclug.org.uk/listinfo/list > FAQ: http://www.dcglug.org.uk/listfaq > Is is better to use a linear regulator to introduce the least noise into the system? It probably doesn't matter to most but I'm making a battery powered pi/rtl-sdr radio over ip setup, just about to sort this section out. Seems they make 20mhz noise (10% load) - which lies between two amateur bands I want to rx. Stick with a linear regulator or is there a better choice out there? -- The Mailing List for the Devon & Cornwall LUG http://mailman.dclug.org.uk/listinfo/list FAQ: http://www.dcglug.org.uk/listfaq