I need a space saving power supply for powering a pic chip and very little
other components from the mains directly which will work in any country.
I've been looking at the Harris Semiconductor HV-2405E which RS Components
can supply, but due to the size on inline power resistor (5W) the heat
disapation is very high, no use for plastic enclosures. Has anyone any other
ideas, or should I just use a 240V-12V transormer, a bridge rectifier, a 35V
470uF cap, and a 7805. This seems to work well on both 240V and 110V, but is
rather large, or does anyone know of a supplier of ultra small transformers.