Non-insulated power supplies are often required when a power semiconductor, which has to be controlled using this supply, has its drive reference connected to the mains (line or neutral terminal).

A series commutated SCR makes a very unusual Solid State Switch in this solar charge regulator control. Advantages include simplicity and robustness. The SCR performs (3) functions: switch, latch and ...

Permanent magnet dc motors need a chunky inductor in series with them if they are fed from an SCR (thyristor) based mains power controller. It is (probably!) possible to safely interface an Arduino to ...