Version 4 SHEET 1 880 680 WIRE 208 16 -16 16 WIRE 208 96 208 16 WIRE -16 112 -16 16 WIRE 32 112 -16 112 WIRE 96 112 80 112 WIRE 160 112 96 112 WIRE -16 144 -16 112 WIRE 96 192 96 112 WIRE 208 208 208 176 WIRE -16 320 -16 224 WIRE 96 320 96 272 WIRE 96 320 -16 320 WIRE 160 320 160 160 WIRE 160 320 96 320 WIRE 208 320 208 288 WIRE 208 320 160 320 WIRE 160 368 160 320 FLAG 160 368 0 SYMBOL sw 208 192 M180 SYMATTR InstName S1 SYMATTR Value sw1 SYMBOL polcap 32 128 R270 WINDOW 0 32 32 VTop 0 WINDOW 3 0 32 VBottom 0 SYMATTR InstName C1 SYMATTR Value 100µ SYMBOL voltage -16 128 R0 WINDOW 123 0 0 Left 0 WINDOW 39 0 0 Left 0 SYMATTR InstName V1 SYMATTR Value 12 SYMBOL res 192 192 R0 SYMATTR InstName R1 SYMATTR Value 1k SYMBOL res 80 176 R0 SYMATTR InstName R2 SYMATTR Value 20k TEXT -10 416 Left 0 !.tran 0 2 0 .001 TEXT -8 448 Left 0 !.model sw1 sw(Ron=1 Roff=1000meg)