Version 4
SHEET 1 1208 680
WIRE 768 -144 368 -144
WIRE -112 -112 -224 -112
WIRE 368 -112 368 -144
WIRE 368 -112 -112 -112
WIRE 416 -112 368 -112
WIRE 768 -96 768 -144
WIRE 1056 -96 848 -96
WIRE -224 -64 -224 -112
WIRE 416 -16 416 -32
WIRE 848 -16 848 -96
WIRE 880 -16 848 -16
WIRE 1056 0 1056 -96
WIRE 1056 0 944 0
WIRE 416 16 112 16
WIRE 544 16 416 16
WIRE 704 16 624 16
WIRE 768 16 768 -16
WIRE 768 16 704 16
WIRE 880 16 768 16
WIRE 384 32 48 32
WIRE 704 32 704 16
WIRE -224 48 -224 0
WIRE -112 48 -112 -112
WIRE 0 80 -32 80
WIRE 80 80 0 80
WIRE 128 80 80 80
WIRE 368 80 368 -112
WIRE 368 80 352 80
WIRE -112 144 -112 128
WIRE 48 144 48 32
WIRE 48 144 0 144
WIRE 112 144 112 16
WIRE 112 144 48 144
WIRE 128 144 112 144
WIRE 384 144 384 32
WIRE 384 144 352 144
WIRE 704 144 704 112
WIRE -224 192 -224 112
WIRE -176 192 -224 192
WIRE 384 208 384 144
WIRE 384 208 352 208
WIRE -224 224 -224 192
WIRE 0 240 0 144
WIRE 0 240 -112 240
WIRE 384 272 352 272
WIRE 80 304 80 80
WIRE 80 304 -224 304
WIRE 384 352 384 336
WIRE 592 352 592 336
FLAG 384 352 0
FLAG 416 16 d_scie
FLAG -32 80 0
FLAG 416 -16 0
FLAG 704 144 0
FLAG 592 352 0
FLAG 592 256 Vcc
FLAG 912 -32 Vcc
FLAG 912 32 0
SYMBOL Misc\\NE555 240 176 R0
SYMATTR InstName U1
SYMBOL cap 368 272 R0
SYMATTR InstName C1
SYMATTR Value 0.01µ
SYMATTR SpiceLine V=16 Irms=0 Rser=0.0158 Lser=350p mfg="Würth Elektronik" pn="885012008017 WCAP-CSGP 1206" type="NP0"
SYMBOL cap -16 80 R0
WINDOW 3 -26 78 Left 2
SYMATTR Value 0.001µ
SYMATTR InstName C
SYMATTR SpiceLine V=16 Irms=0 Rser=0.044 Lser=420p mfg="Würth Elektronik" pn="885012006029 WCAP-CSGP 0603" type="NP0"
SYMBOL pnp -176 240 M180
WINDOW 0 37 33 Left 2
WINDOW 3 34 55 Left 2
SYMATTR InstName Q1
SYMATTR Value 2N2907
SYMBOL res -128 32 R0
SYMATTR InstName RE
SYMATTR Value 10k
SYMBOL res -240 208 R0
SYMATTR InstName R2
SYMATTR Value 7k5
SYMBOL voltage 416 -128 R0
SYMATTR InstName V1
SYMATTR Value 5
SYMBOL diode -240 -64 R0
SYMATTR InstName D1
SYMATTR Value 1N4148
SYMBOL diode -240 48 R0
SYMATTR InstName D2
SYMATTR Value 1N4148
SYMBOL Comparators\\LT1720 912 -64 R0
SYMATTR InstName U2
SYMBOL res 640 0 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R1
SYMATTR Value 1Meg
SYMBOL res 720 128 R180
WINDOW 0 36 76 Left 2
WINDOW 3 36 40 Left 2
SYMATTR InstName R3
SYMATTR Value 220k
SYMBOL voltage 592 240 R0
SYMATTR InstName V2
SYMATTR Value 12
SYMBOL res 752 -112 R0
SYMATTR InstName R4
SYMATTR Value 1.2Meg
TEXT 32 360 Left 2 !.tran 20m startup