and quite a lot of radio interference I noticed a few years ago when messing
around with a radio near a shop with them round the window.
Brian

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This newsgroup posting comes to you directly from...
The Sofa of Brian Gaff...

Blind user, so no pictures please!
"John Rumm" wrote in message
o.uk...
On 13/12/2016 00:23, Dave Plowman (News) wrote:
Got a set of Xmas lights. Gawd knows how they do them at the price.
Blue and White. PS/controller gives a variety of programmes. Including
flashing the blue and white alternately, or all on together. But only two
wires from the PS. I can see reversing the polarity could have one colour
or the other, but how both at once with no apparent flicker? Fast
switching?

Yup pretty much... Throw a bit of PWM into the mix as well, and you should
be able to get dimming and fading effects as well.


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Cheers,

John.

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