What kind of dimmer switch do I need for a low voltage light having a toroidal transformer?

Question

I have been sold 2 switches from so called experts neither of which has worked - one caused the light to flicker the other had a horrendous buzzing noise

Answer 1

You can't use a standard dimmer switch with anything that uses a transformer. The transformer needs the undistorted mains waveform (50Hz sinewave) to work properly but normal dimmers work by chopping sections out of the waveform.
That doesn't mean that it can't be done.
Try looking through the electrical stuff at B & Q. I seem to remember seeing something relating to dimming low-voltage lighting a while back.

Answer 2

very few low voltage halogen easy are dimmable - examine the techniques on the transformers and lightweight fittings intently to work out in the event that they may be dimmed devoid of inflicting lamp failure. in the event that they are dimmable then you rather choose a primary 240 volt dimmer swap.

Answer 3

it would be much easier to change the transformer to a dimmable electronic transformer instead of the toroidal.