Version 4 SHEET 1 1144 680 WIRE 128 -144 -160 -144 WIRE 400 -144 128 -144 WIRE 592 -144 400 -144 WIRE 752 -144 592 -144 WIRE -160 -112 -160 -144 WIRE 128 -112 128 -144 WIRE 592 -64 592 -144 WIRE 752 16 752 -144 WIRE 128 32 128 -32 WIRE 128 32 -32 32 WIRE -448 64 -544 64 WIRE -352 64 -448 64 WIRE -160 64 -160 -32 WIRE -160 64 -288 64 WIRE 400 64 400 -144 WIRE -32 128 -32 32 WIRE 128 128 128 32 WIRE 752 128 752 96 WIRE -544 160 -544 64 WIRE -448 176 -448 64 WIRE 272 176 192 176 WIRE 400 176 400 144 WIRE 400 176 272 176 WIRE 400 208 400 176 WIRE -32 224 -32 192 WIRE 128 224 32 224 WIRE -160 240 -160 64 WIRE -160 240 -272 240 WIRE 272 272 272 176 WIRE -160 288 -160 240 WIRE 592 288 592 0 WIRE -544 320 -544 240 WIRE -448 320 -448 240 WIRE -448 320 -544 320 WIRE 400 320 400 288 WIRE -16 336 -96 336 WIRE 32 336 32 224 WIRE 32 336 -16 336 WIRE -16 368 -16 336 WIRE -448 384 -448 320 WIRE -160 480 -160 384 WIRE -16 496 -16 448 WIRE -272 544 -272 240 WIRE 272 544 272 336 WIRE 272 544 -272 544 FLAG -32 224 0 FLAG 752 128 0 FLAG 400 320 0 FLAG -160 480 0 FLAG -448 384 0 FLAG 592 288 0 FLAG -16 496 0 SYMBOL pnp 192 224 R180 SYMATTR InstName Q1 SYMATTR Value 2N3906 SYMBOL res 112 -128 R0 SYMATTR InstName R1 SYMATTR Value 5K SYMBOL cap -48 128 R0 SYMATTR InstName C1 SYMATTR Value 0.1µf SYMBOL voltage 752 0 R0 WINDOW 123 0 0 Left 2 WINDOW 39 0 0 Left 2 SYMATTR InstName V1 SYMATTR Value 2.8 SYMBOL res 384 48 R0 SYMATTR InstName R2 SYMATTR Value 1MEG SYMBOL res 384 192 R0 SYMATTR InstName R3 SYMATTR Value 2MEG SYMBOL npn -96 288 M0 SYMATTR InstName Q3 SYMATTR Value 2N3904 SYMBOL ind -176 -128 R0 SYMATTR InstName L1 SYMATTR Value 0.0047 SYMATTR SpiceLine Rser=22 SYMBOL schottky -288 48 R90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 SYMATTR InstName D1 SYMATTR Value BAT54 SYMATTR Description Diode SYMATTR Type diode SYMBOL cap -464 176 R0 SYMATTR InstName C2 SYMATTR Value 10µf SYMBOL schottky 256 272 R0 SYMATTR InstName D2 SYMATTR Value BAT54 SYMATTR Description Diode SYMATTR Type diode SYMBOL cap 576 -64 R0 SYMATTR InstName C3 SYMATTR Value 100µF SYMBOL res -32 352 R0 SYMATTR InstName R4 SYMATTR Value 220K SYMBOL res -560 144 R0 SYMATTR InstName R5 SYMATTR Value 1K TEXT -128 -200 Left 2 !.tran 0 150m 0 50u uic TEXT 176 16 Left 2 ;David Pilling 2015