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On 17/06/13 12:45, Tel Bonic wrote:
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/listfaqIs 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?
I recommend some of those new-fangled condensers! Tom te tom te tom -- The Mailing List for the Devon & Cornwall LUG http://mailman.dclug.org.uk/listinfo/list FAQ: http://www.dcglug.org.uk/listfaq