"Leif Neland" wrote in message
...
Phil Allison kom med følgende:
"Arfa Daily"

Although of course, care needs to be taken that the lamps are actually
being fed with DC.


** LEDs are, believe it or not, DIODES !!

Having LEDs run on one half-phase of AC can cause flicker.

More importantly, you have to protect it on the alternate half-cycles, the
series resistor doesn't usually drop enough voltage at the reverse leakage
current to protect the typically 5V PIV.

Either use the LEDs in inverse-parallel pairs, or protect each one with an
inverse-parallel 1N4148.