On 11/01/2019 04:33, Charlie Gibbs wrote:
> On 2019-01-10, Andrew Gabriel  wrote:
>
>> More recently, I tried some cheap DC DC buck converters from Amazon/Ebay.
>> They work, but they generate so much RF noise the WiFi was unable to
>> work on the Pi. None had any output filtering other than just the single
>> electrolytic capacitor. Even with adding some filtering, I couldn't get
>> WiFi working. Went back to a car cigarette lighter adaptor, which works
>> fine. (A friend told me some of the car adaptors have bad RF radiation
>> too - he used them in a glider to power a GPS, and you would get the odd
>> bad one which killed the GPS signal.)
>
> I have one in my car.  It wipes out the distant FM station I often listen to.
>
Best ever buck/SM converters I came across were made for RC planes with
interference an absolute nono.

https://www.dimensionengineering.com/products/de-sw050

$15 is not cheap, but oh is it worth it.


There is a single cell to 5V (adjustable) one as well that upconverts.

--
Future generations will wonder in bemused amazement that the early
twenty-first century’s developed world went into hysterical panic over a
globally average temperature increase of a few tenths of a degree, and,
on the basis of gross exaggerations of highly uncertain computer
projections combined into implausible chains of inference, proceeded to
contemplate a rollback of the industrial age.

Richard Lindzen

--- SoupGate-Win32 v1.05