* SPICE netlist
V1 N012 0 7.2
XM1 N006 N005 N002 irlru7843 ;pnba D)G)S
R2 N005 N012 10k
XQ1 N005 N003 0 MMBT3904 ;pnba C)B)E
R3 LET_COLOR N003 10k
XM2 N007 LET_COLOR N002 irlru7843 ;pnba D)G)S
R4 N010 N012 4
R1 N011 N012 4
D1 N008 N006 MYLED
D2 N010 N008 MYLED
D3 N011 N009 MYLED
D4 N009 N007 MYLED
XM3 N002 LET_POWER 0 irlru7843 ;pnba D)G)S
R5 N001 LET_POWER 1k
R6 N004 LET_COLOR 1k
R7 0 N001 10k
R8 0 N004 10k
V2 N001 0 5
V3 N004 0 PULSE(0 5 0 1u 1u 500m 1)
.SUBCKT MMBT3904 1 2 3
Q1 1 2 3 MAIN
D1 2 1 DIODE
+ IS = 2.612E-015
+ NF = 1.005
+ ISE = 2.958E-015
+ NE = 1.533
+ BF = 169
+ IKF = 0.08351
+ VAF = 53.92
+ NR = 0.9982
+ ISC = 3.177E-016
+ NC = 1.094
+ BR = 2.107
+ IKR = 0.5
+ VAR = 100
+ RB = 114
+ IRB = 0.001
+ RBM = 6.2
+ RE = 0.04181
+ RC = 0.9576
+ XTB = 1.522
+ EG = 1.11
+ XTI = 4.633
+ CJE = 1.032E-011
+ VJE = 0.6333
+ MJE = 0.2056
+ TF = 3.55E-010
+ XTF = 10
+ VTF = 2
+ ITF = 0.3
+ PTF = 0
+ CJC = 3.181E-012
+ VJC = 0.8831
+ MJC = 0.3242
+ XCJC = 1
+ TR = 1.45E-007
+ CJS = 0
+ VJS = 0.75
+ MJS = 0.333
+ FC = 0.78
+ IS = 1.82E-013
+ N = 1.042
+ BV = 1000
+ IBV = 0.001
+ RS = 380.9
+ CJO = 0
+ VJ = 1
+ M = 0.5
+ FC = 0
+ TT = 0
+ EG = 1.11
+ XTI = 3
.SUBCKT irlru7843 1 2 3
M1 9 7 8 8 MM L=100u W=100u
+VTO=2.51568 LAMBDA=0.00721063 KP=392.934
+CGSO=4.05151e-05 CGDO=8.83302e-07
RS 8 3 0.00215846
D1 3 1 MD
+IBV=0.00025 EG=1.2 XTI=4 TT=1e-07
+CJO=1.75159e-09 VJ=1.32632 M=0.487224 FC=0.5
RDS 3 1 3e+07
RD 9 1 0.0001
RG 2 7 4.17882
D2 4 5 MD1
+CJO=5.6195e-10 VJ=3.17372 M=0.3 FC=1e-08
D3 0 5 MD2
RL 5 10 1
FI2 7 9 VFI2 -1
VFI2 4 0 0
EV16 10 0 9 7 1
CAP 11 10 2.22721e-09
FI1 7 9 VFI1 -1
VFI1 11 6 0
RCAP 6 10 1
D4 0 6 MD3
.SUBCKT irlru7843t 2 0
R_RTHERM1 2 1 0.508421
C_CTHERM1 2 0 0.000771
R_RTHERM2 1 0 0.542316
C_CTHERM2 1 0 0.020483
.tran 4

* LTspice schematic (.asc)
Version 4
SHEET 1 1440 880
WIRE 624 -440 544 -440
WIRE -112 -344 -240 -344
WIRE -240 -312 -240 -344
WIRE -112 -248 -112 -344
WIRE 208 -232 -64 -232
WIRE 432 -232 208 -232
WIRE 544 -232 544 -440
WIRE 544 -232 512 -232
WIRE 576 -232 544 -232
WIRE 704 -232 656 -232
WIRE -112 -136 -112 -152
WIRE -112 -136 -448 -136
WIRE 208 -136 -112 -136
WIRE 0 -56 -96 -56
WIRE 96 -56 80 -56
WIRE 336 -56 96 -56
WIRE 432 -56 336 -56
WIRE 544 -56 512 -56
WIRE 576 -56 544 -56
WIRE 704 -56 704 -232
WIRE 704 -56 656 -56
WIRE -96 -40 -96 -56
WIRE 704 -24 704 -56
WIRE -448 8 -448 -136
WIRE 208 8 208 -136
WIRE -288 24 -400 24
WIRE -144 24 -288 24
WIRE 0 24 -48 24
WIRE 96 24 96 -56
WIRE 160 24 96 24
WIRE 0 40 0 24
WIRE -624 104 -720 104
WIRE 544 120 544 -56
WIRE 640 120 544 120
WIRE -624 136 -624 104
WIRE -288 136 -288 24
WIRE -448 152 -448 104
WIRE 208 152 208 104
WIRE -720 168 -720 104
WIRE -448 248 -448 216
WIRE 208 248 208 216
WIRE -448 344 -448 312
WIRE 208 344 208 312
WIRE -720 440 -720 248
WIRE -448 440 -448 424
WIRE -448 440 -720 440
WIRE -288 440 -288 216
WIRE -288 440 -448 440
WIRE 208 440 208 424
WIRE 208 440 -288 440
FLAG 0 40 0
FLAG -240 -312 0
FLAG -624 136 0
FLAG 336 -56 LET_COLOR
FLAG 208 -232 LET_POWER
FLAG 704 -24 0
FLAG 704 -440 0
FLAG 720 120 0
SYMBOL voltage -720 264 R180
SYMATTR InstName V1
SYMATTR Value 7.2
SYMBOL nmos -400 104 R180
SYMATTR InstName M1
SYMATTR Value irlru7843
SYMATTR Prefix X
SYMBOL res -304 120 R0
SYMATTR InstName R2
SYMATTR Value 10k
SYMBOL npn -144 -40 M90
SYMATTR InstName Q1
SYMATTR Value MMBT3904
SYMATTR Prefix X
SYMBOL res 96 -72 R90
SYMATTR InstName R3
SYMATTR Value 10k
SYMBOL nmos 160 104 M180
SYMATTR InstName M2
SYMATTR Value irlru7843
SYMATTR Prefix X
SYMBOL res -464 328 R0
SYMATTR InstName R4
SYMATTR Value 4
SYMBOL res 192 328 R0
SYMATTR InstName R1
SYMATTR Value 4
SYMBOL diode -432 216 R180
SYMATTR InstName D1
SYMATTR Value MYLED
SYMBOL diode -432 312 R180
SYMATTR InstName D2
SYMATTR Value MYLED
SYMBOL diode 224 312 R180
SYMATTR InstName D3
SYMATTR Value MYLED
SYMBOL diode 224 216 R180
SYMATTR InstName D4
SYMATTR Value MYLED
SYMBOL nmos -64 -152 R180
SYMATTR InstName M3
SYMATTR Value irlru7843
SYMATTR Prefix X
SYMBOL res 528 -248 R90
SYMATTR InstName R5
SYMATTR Value 1k
SYMBOL res 528 -72 R90
SYMATTR InstName R6
SYMATTR Value 1k
SYMBOL res 672 -248 R90
SYMATTR InstName R7
SYMATTR Value 10k
SYMBOL res 672 -72 R90
SYMATTR InstName R8
SYMATTR Value 10k
SYMBOL voltage 608 -440 R270
SYMATTR InstName V2
SYMATTR Value 5
SYMBOL voltage 624 120 R270
SYMATTR InstName V3
SYMATTR Value PULSE(0 5 0 1u 1u 500m 1)