At 11:59 PM 7/25/01 -0300, you wrote:

> Nah, I need it to be as small and CHEAP as possible :o( Any sugestions? ;o)

If you insist, you can scale the supplies by simply increasing the capacitance
and beefing up the other parts.

But first try to reduce the current your circuit requires as much as
possible.
The higher the series resistor you put in there, the more heat you get, but
the more resistant to transients your circuit will be. To get 100mA from a
240V 50Hz supply, you'd need a couple of uF rated for across the line
operation
(preferably 630VDC rating or UL/CSA X type if you want it to be relatively
trouble-free). That means a fairly large film capacitor. They are fairly
cheaply
available (polyester).

A transformer is usually better unless your product is throw-away cheap and
dirty.

Best regards,
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