Version 4.1
SHEET 1 880 680
WIRE 256 96 -160 96
WIRE 352 96 256 96
WIRE 656 96 432 96
WIRE -160 128 -160 96
WIRE 656 144 656 96
WIRE 256 192 256 96
WIRE -16 208 -64 208
WIRE 80 208 64 208
WIRE -64 240 -64 208
WIRE 656 256 656 224
WIRE 80 288 80 208
WIRE -160 352 -160 208
WIRE -64 352 -64 320
WIRE -64 352 -160 352
WIRE 32 352 -64 352
WIRE 160 352 128 352
WIRE 256 352 256 256
WIRE 256 352 160 352
WIRE 352 352 256 352
WIRE 656 352 656 336
WIRE 656 352 432 352
WIRE -160 368 -160 352
FLAG -160 368 0
FLAG 160 352 Vsw
FLAG 656 96 RelP
FLAG 656 352 RelM
SYMBOL ind 640 128 R0
SYMATTR InstName L1
SYMATTR Value 1
SYMBOL voltage -160 112 R0
SYMATTR InstName V1
SYMATTR Value 12
SYMBOL voltage -64 224 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
WINDOW 3 -199 193 Left 2
SYMATTR Value PULSE(0 5 1m 10n 10n 10m 20m)
SYMATTR InstName V2
SYMBOL diode 272 256 R180
WINDOW 0 24 64 Left 2
WINDOW 3 24 0 Left 2
SYMATTR InstName D1
SYMATTR Value 1N4148
SYMBOL res 640 240 R0
SYMATTR InstName R1
SYMATTR Value 500
SYMBOL ind 448 80 R90
WINDOW 0 5 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName L2
SYMATTR Value 100µ
SYMATTR SpiceLine Rser=10m
SYMBOL ind 448 336 R90
WINDOW 0 5 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName L3
SYMATTR Value 100µ
SYMATTR SpiceLine Rser=10m
SYMBOL npn 128 288 R90
WINDOW 0 -8 4 VRight 2
WINDOW 3 87 5 VRight 2
SYMATTR InstName Q1
SYMATTR Value 2N2222
SYMBOL res 80 192 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R2
SYMATTR Value 5k
TEXT 128 480 Left 2 !.tran 0 25m 0 uic
TEXT 400 -8 Center 2 ;~100mm of\nPCB track
LINE Normal 320 416 320 32 1
LINE Normal 320 416 320 416 1
LINE Normal 320 416 320 416 1
LINE Normal 480 416 480 32 1