Version 4
SHEET 1 1276 708
WIRE -160 -80 -432 -80
WIRE 272 -80 -160 -80
WIRE 384 -80 272 -80
WIRE 432 -80 384 -80
WIRE 896 -80 432 -80
WIRE 1008 -80 896 -80
WIRE 272 -48 272 -80
WIRE 432 -32 432 -80
WIRE -432 16 -432 -80
WIRE 240 32 208 32
WIRE 896 32 896 -80
WIRE 384 48 384 -80
WIRE 208 64 208 32
WIRE 240 64 240 32
WIRE 272 64 272 32
WIRE 272 64 240 64
WIRE 272 96 272 64
WIRE 320 96 272 96
WIRE -160 128 -160 -80
WIRE 416 144 384 144
WIRE 432 144 432 48
WIRE 432 144 416 144
WIRE 464 144 432 144
WIRE 592 144 544 144
WIRE 672 144 592 144
WIRE 752 144 672 144
WIRE 800 144 752 144
WIRE 1008 160 1008 -80
WIRE -432 176 -432 96
WIRE -224 176 -432 176
WIRE 208 176 208 144
WIRE -64 224 -160 224
WIRE 80 224 16 224
WIRE 144 224 80 224
WIRE 0 288 -224 288
WIRE 80 304 80 224
WIRE 160 304 80 304
WIRE 272 304 160 304
WIRE 416 304 416 144
WIRE 416 304 336 304
WIRE 752 304 752 144
WIRE -432 320 -432 176
WIRE -224 320 -224 288
WIRE 672 320 672 144
WIRE 160 336 160 304
WIRE 416 384 416 304
WIRE -384 432 -384 400
WIRE -224 432 -224 400
WIRE -224 432 -384 432
WIRE -224 448 -224 432
WIRE 0 496 0 288
WIRE 592 496 592 144
WIRE 592 496 0 496
WIRE -432 576 -432 416
WIRE -224 576 -224 528
WIRE -224 576 -432 576
WIRE 160 576 160 400
WIRE 160 576 -224 576
WIRE 208 576 208 272
WIRE 208 576 160 576
WIRE 416 576 416 448
WIRE 416 576 208 576
WIRE 672 576 672 384
WIRE 672 576 416 576
WIRE 752 576 752 384
WIRE 752 576 672 576
WIRE 896 576 896 96
WIRE 896 576 752 576
WIRE 1008 576 1008 240
WIRE 1008 576 896 576
WIRE 896 624 896 576
FLAG 896 624 0
SYMBOL npn 144 176 R0
SYMATTR InstName Q1
SYMATTR Value 2N3904
SYMBOL pnp 320 144 M180
SYMATTR InstName Q2
SYMATTR Value 2N3906
SYMBOL res 256 -64 R0
SYMATTR InstName R2
SYMATTR Value 10K
SYMBOL ind 560 128 R90
WINDOW 0 5 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName L1
SYMATTR Value 0.001
SYMATTR SpiceLine Rser=1
SYMBOL schottky 432 448 R180
WINDOW 0 24 64 Left 2
WINDOW 3 24 0 Left 2
SYMATTR InstName D1
SYMATTR Value BAT54
SYMATTR Description Diode
SYMATTR Type diode
SYMBOL cap 656 320 R0
SYMATTR InstName C1
SYMATTR Value 100µF
SYMBOL res 736 288 R0
SYMATTR InstName R3
SYMATTR Value 1K
SYMBOL cap 144 336 R0
SYMATTR InstName C2
SYMATTR Value 0.47n
SYMBOL cap 336 288 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C3
SYMATTR Value 0.1n
SYMBOL voltage 1008 144 R0
WINDOW 123 0 0 Left 2
WINDOW 39 24 124 Left 2
SYMATTR InstName V1
SYMATTR Value 5
SYMBOL cap 880 32 R0
SYMATTR InstName C4
SYMATTR Value 1000µF
SYMBOL res 192 48 R0
SYMATTR InstName R5
SYMATTR Value 10K
SYMBOL res 32 208 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R1
SYMATTR Value 100K
SYMBOL nmos -384 320 M0
SYMATTR InstName M1
SYMATTR Value 2N7000
SYMBOL res -448 0 R0
SYMATTR InstName R6
SYMATTR Value 1MEG
SYMBOL res -240 304 R0
SYMATTR InstName R7
SYMATTR Value 1MEG
SYMBOL res -240 432 R0
SYMATTR InstName R8
SYMATTR Value 1MEG
SYMBOL npn -224 128 R0
SYMATTR InstName Q3
SYMATTR Value 2N3904
SYMBOL res 416 -48 R0
SYMATTR InstName R9
SYMATTR Value 1MEG
TEXT -64 632 Left 2 !.tran 0 500ms 0 50u
TEXT -64 536 Left 2 ;David Pilling 2015 based on "The 2-transistor Black regulator"