Version 4
SHEET 1 1264 680
WIRE -240 -48 -496 -48
WIRE 288 -48 -240 -48
WIRE 320 -48 288 -48
WIRE 464 -48 464 -80
WIRE 528 -48 464 -48
WIRE 736 -48 592 -48
WIRE 832 -48 736 -48
WIRE 944 -48 896 -48
WIRE 1184 -48 944 -48
WIRE 320 -16 320 -48
WIRE 48 48 -160 48
WIRE 288 48 288 -48
WIRE 288 48 272 48
WIRE 1184 64 1184 -48
WIRE 944 80 944 -48
WIRE -128 112 -160 112
WIRE -16 112 -64 112
WIRE 48 112 -16 112
WIRE 320 112 320 64
WIRE 320 112 272 112
WIRE 336 112 320 112
WIRE 480 112 416 112
WIRE -704 144 -704 48
WIRE -496 144 -496 -48
WIRE 944 160 944 144
WIRE 48 176 -96 176
WIRE 480 176 480 112
WIRE 480 176 272 176
WIRE 736 176 736 -48
WIRE 944 192 944 160
WIRE 1184 192 1184 144
WIRE 1200 192 1184 192
WIRE -240 240 -240 -48
WIRE 48 240 -240 240
WIRE 336 240 272 240
WIRE 448 240 400 240
WIRE -704 288 -704 224
WIRE -96 384 -96 176
WIRE 736 384 736 240
WIRE 736 384 -96 384
WIRE 944 384 736 384
WIRE -496 448 -496 224
WIRE -16 448 -16 112
WIRE 480 448 480 176
WIRE 480 448 -16 448
FLAG -160 48 0
FLAG -160 112 0
FLAG -496 448 0
FLAG 448 240 0
FLAG -704 288 0
FLAG -704 48 +ub
FLAG 944 160 +ub
FLAG 464 -80 +ub
FLAG 1200 192 +ub
SYMBOL Misc\\NE555 160 144 R0
SYMATTR InstName U1
SYMBOL cap -64 96 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C1
SYMATTR Value 1n
SYMBOL res 432 96 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R2
SYMATTR Value 10k
SYMBOL res 304 -32 R0
SYMATTR InstName R3
SYMATTR Value 10k
SYMBOL voltage -496 128 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V1
SYMATTR Value 12
SYMBOL cap 400 224 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C2
SYMATTR Value 10n
SYMBOL diode 528 -32 R270
WINDOW 0 32 32 VTop 2
WINDOW 3 0 32 VBottom 2
SYMATTR InstName D1
SYMATTR Value 1N4148
SYMBOL cap 720 176 R0
SYMATTR InstName C3
SYMATTR Value 4.7µ
SYMBOL diode 832 -32 R270
WINDOW 0 32 32 VTop 2
WINDOW 3 0 32 VBottom 2
SYMATTR InstName D2
SYMATTR Value 1N4148
SYMBOL cap 928 80 R0
SYMATTR InstName C4
SYMATTR Value 4.7µ
SYMBOL voltage -704 128 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V2
SYMATTR Value 24
SYMBOL res 1168 48 R0
SYMATTR InstName R1
SYMATTR Value 500
TEXT -530 488 Left 2 !.tran 10m