On 06/02/2021 09:19, jon wrote:
On Thu, 04 Feb 2021 22:18:45 +0000, John Rumm wrote:

On 04/02/2021 20:21, Brian Gaff (Sofa) wrote:

Well its still mechanical then, just momentary rather than toggle,if
you like the toggle is electronic. A circuit with hysteresis, like a
bistable multivibrator circuit and one of the loads is operating the
switch.

Which means the load is *not* mechanically switched. So the switch
depends on bleeding some current through the load for its electronics to
be powered.


The start sequence is initiated with a mechanical switch.

Yup, but that needs powered electronics to respond to it and switch the
load. So the switch is essentially an electronic one that needs to be
continuously powered to work.

This is different from the Varilight push on / off dimmers. That are
completely "off" when the push switch is in the off position, and only
run their electronics when they are switched on with the mechanical switch.

The former type (along with touch dimmers) can cause sensitive lamps to
glow even when turned off as a result of the quiescent load drawn
through the lamp by the electronics. The latter type won't do that,
although you can still get a glow as a result of capacitive coupling of
the switched live wire to the lamps.


--
Cheers,

John.

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