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?

Fascinating devices.
Googling for NorthLight products (as seen in the videos) suggest Clas
Ohlsen but the site say discontinued maybe sold out until next Xmas perhaps?
Anyone found a supplier with stock?