* SPICE netlist
R3 N004 N012 1.5k
C5 N012 N011 100nF
R5 N011 N010 1k
C4 N012 0 100nF
R4 N011 0 1.8k
Q1 N014 N010 0 0 NPN
R6 N014 N015 220
R7 N004 N003 2.2k
C6 0 N003 10nF
C7 N003 N002 10nF
R8 N002 0 4.7k
R9 N001 N002 200k
Q2 N005 N001 0 0 NPN
R10 N005 N006 220
D2 Vcc N006 D
D1 Vcc N015 D
XU2 0 N008 N004 Vcc N013 N008 N007 Vcc NE555 ;pnba GND)TRIG)OUT)RST)CV)THRS)DIS)Vcc
V2 Vcc 0 5
C1 N008 0 100nF
R1 Vcc N007 1k
R2 N009 N008 330
RPOT N007 N009 {R_POT}
C2 N013 0 100nF
.tran 0.01
.param R_POT=6370

* LTspice schematic (.asc)
Version 4.1
SHEET 1 2048 1152
WIRE -752 -496 -752 -576
WIRE -560 -496 -560 -576
WIRE -1008 -416 -1008 -512
WIRE -912 -368 -944 -368
WIRE -752 -368 -752 -416
WIRE -752 -368 -832 -368
WIRE -688 -368 -752 -368
WIRE -560 -368 -560 -432
WIRE -560 -368 -624 -368
WIRE -496 -368 -560 -368
WIRE -336 -368 -416 -368
WIRE -1008 -272 -1008 -320
WIRE -1008 -144 -1008 -192
WIRE 848 -64 768 -64
WIRE -1008 -32 -1008 -80
WIRE 320 0 144 0
WIRE 368 0 320 0
WIRE 768 0 768 -64
WIRE 768 0 368 0
WIRE 848 16 848 -64
WIRE 1024 32 944 32
WIRE 1024 64 1024 32
WIRE 480 80 368 80
WIRE 768 80 768 0
WIRE 768 80 704 80
WIRE 144 128 144 0
WIRE 848 128 848 96
WIRE 848 128 768 128
WIRE -1008 144 -1008 96
WIRE 480 144 432 144
WIRE 768 144 768 128
WIRE 768 144 704 144
WIRE 848 160 848 128
WIRE 944 160 944 32
WIRE 944 160 848 160
WIRE 1024 176 1024 144
WIRE -880 192 -944 192
WIRE -736 192 -800 192
WIRE -688 192 -736 192
WIRE -560 192 -624 192
WIRE -496 192 -560 192
WIRE -336 192 -336 -368
WIRE -336 192 -416 192
WIRE -96 192 -336 192
WIRE 480 208 272 208
WIRE 784 208 704 208
WIRE 944 240 848 240
WIRE -736 256 -736 192
WIRE -560 272 -560 192
WIRE -96 272 -96 192
WIRE 272 272 272 208
WIRE 272 272 -96 272
WIRE 320 272 320 0
WIRE 480 272 320 272
WIRE 736 272 704 272
WIRE 784 272 784 208
WIRE 848 272 848 240
WIRE 848 272 784 272
WIRE 944 288 944 240
WIRE 1024 288 1024 256
WIRE 1024 288 944 288
WIRE -1008 320 -1008 240
WIRE -560 336 -560 320
WIRE 432 352 432 144
WIRE 784 352 784 272
WIRE 784 352 432 352
WIRE 144 368 144 208
WIRE 272 368 144 368
WIRE 368 368 368 80
WIRE 368 368 272 368
WIRE 848 368 848 336
WIRE 272 400 272 368
WIRE -736 416 -736 336
WIRE -560 416 -560 336
WIRE 736 416 736 272
WIRE -1008 464 -1008 400
WIRE -1008 576 -1008 528
WIRE 736 576 736 480
FLAG -736 416 0
FLAG -560 416 0
FLAG -752 -576 0
FLAG -1008 -512 0
FLAG -1008 96 0
FLAG -1008 -32 Vcc
IOPIN -864 -16 In
FLAG -1008 576 Vcc
IOPIN -864 592 In
FLAG 272 400 0
FLAG 848 368 0
FLAG 368 0 Vcc
FLAG 736 576 0
FLAG -560 -576 0
SYMBOL res -400 176 R90
SYMATTR InstName R3
SYMATTR Value 1.5k
SYMBOL cap -624 176 R90
SYMATTR InstName C5
SYMATTR Value 100nF
SYMBOL res -784 176 R90
SYMATTR InstName R5
SYMATTR Value 1k
SYMBOL cap -576 272 R0
SYMATTR InstName C4
SYMATTR Value 100nF
SYMBOL res -752 240 R0
SYMATTR InstName R4
SYMATTR Value 1.8k
SYMBOL npn -944 240 R180
SYMATTR InstName Q1
SYMBOL res -1024 304 R0
SYMATTR InstName R6
SYMATTR Value 220
SYMBOL res -400 -384 R90
SYMATTR InstName R7
SYMATTR Value 2.2k
SYMBOL cap -576 -496 R0
SYMATTR InstName C6
SYMATTR Value 10nF
SYMBOL cap -624 -384 R90
SYMATTR InstName C7
SYMATTR Value 10nF
SYMBOL res -736 -400 R180
SYMATTR InstName R8
SYMATTR Value 4.7k
SYMBOL res -928 -352 R270
SYMATTR InstName R9
SYMATTR Value 200k
SYMBOL npn -944 -320 R180
SYMATTR InstName Q2
SYMBOL res -1024 -288 R0
SYMATTR InstName R10
SYMATTR Value 220
SYMBOL LED -992 -80 R180
SYMATTR InstName D2
SYMBOL LED -992 528 R180
SYMATTR InstName D1
SYMBOL Misc\\NE555 592 176 R0
SYMATTR InstName U2
SYMBOL voltage 144 112 R0
SYMATTR InstName V2
SYMATTR Value 5
SYMBOL cap 832 272 R0
SYMATTR InstName C1
SYMATTR Value 100nF
SYMBOL res 832 0 R0
SYMATTR InstName R1
SYMATTR Value 1k
SYMBOL res 1008 160 R0
SYMATTR InstName R2
SYMATTR Value 330
SYMBOL res 1008 48 R0
SYMATTR InstName POT
SYMATTR Value {R_POT}
SYMBOL cap 720 416 R0
SYMATTR InstName C2
SYMATTR Value 100nF