MM wrote:


snip

Supplementary question:

Is there any use for the old halogen 12V transformers? For example, as
a power supply for Maplin electronic kits/modules?

MM

No. They are horrible things. Designed as cheaply as possible.
Damaged by the heat they produce. Output not smoothed at all and
approximately regulated so that a purely resistive load gets about the
right amount of RMS voltage with an arbitrary waveform. And not
adequately insulated to handle safely without an enclosure of some kind.

--

Roger Hayter