voltage doubler
 

Actually I did that kinda wrong. It is not bad per se, but the right way is -

Version 4
SHEET 1 880 680
WIRE 352 64 208 64
WIRE 608 64 352 64
WIRE 688 64 608 64
WIRE 208 96 208 64
WIRE 352 96 352 64
WIRE 608 96 608 64
WIRE 208 176 208 160
WIRE 208 176 -16 176
WIRE 208 208 208 176
WIRE 352 208 352 160
WIRE 416 208 352 208
WIRE 608 208 496 208
WIRE 608 208 608 160
WIRE 32 240 -16 240
WIRE 608 256 608 208
WIRE 32 304 32 240
WIRE 416 304 416 208
WIRE 416 304 32 304
WIRE 208 320 208 272
WIRE 352 320 352 272
WIRE 352 320 208 320
WIRE 608 320 352 320
WIRE 688 320 608 320
WIRE 0 0 0 0
SYMBOL diode 224 272 R180
WINDOW 0 24 64 Left 2
WINDOW 3 24 0 Left 2
SYMATTR InstName D1
SYMBOL diode 368 272 R180
WINDOW 0 24 64 Left 2
WINDOW 3 24 0 Left 2
SYMATTR InstName D2
SYMBOL diode 368 160 R180
WINDOW 0 24 64 Left 2
WINDOW 3 24 0 Left 2
SYMATTR InstName D3
SYMBOL diode 224 160 R180
WINDOW 0 24 64 Left 2
WINDOW 3 24 0 Left 2
SYMATTR InstName D4
SYMBOL sw 512 208 R90
SYMATTR InstName S1
SYMBOL cap 592 96 R0
SYMATTR InstName C2
SYMBOL cap 592 256 R0
SYMATTR InstName C1
TEXT -128 208 Left 2 ;AC input
TEXT 680 192 Left 2 ;DC output
TEXT 368 136 Left 2 ;closed for doubler
TEXT 40 288 Left 2 ;neutral
TEXT 40 152 Left 2 ;hot