Version 4 SHEET 1 880 680 WIRE 128 -144 -224 -144 WIRE 400 -144 128 -144 WIRE 400 -128 400 -144 WIRE 128 -112 128 -144 WIRE -224 -16 -224 -144 WIRE -32 32 -32 -16 WIRE 128 32 128 -32 WIRE 128 32 -32 32 WIRE 160 32 128 32 WIRE 240 32 224 32 WIRE 400 32 400 -48 WIRE 400 32 240 32 WIRE 400 80 400 32 WIRE -224 96 -224 64 WIRE -32 128 -32 32 WIRE 128 128 128 32 WIRE 400 176 400 144 WIRE 400 176 192 176 WIRE 400 208 400 176 WIRE -32 224 -32 192 WIRE 240 256 240 32 WIRE 128 304 128 224 WIRE 176 304 128 304 WIRE 400 320 400 288 WIRE 240 384 240 352 FLAG 240 384 0 FLAG -32 224 0 FLAG -224 96 0 FLAG 400 320 0 FLAG -32 -16 Out SYMBOL pnp 192 224 R180 SYMATTR InstName Q1 SYMATTR Value 2N3906 SYMBOL npn 176 256 R0 SYMATTR InstName Q2 SYMATTR Value 2N3904 SYMBOL res 112 -128 R0 SYMATTR InstName R1 SYMATTR Value 100k SYMBOL cap -48 128 R0 SYMATTR InstName C1 SYMATTR Value 100n SYMBOL voltage -224 -32 R0 WINDOW 123 0 0 Left 0 WINDOW 39 0 0 Left 0 SYMATTR InstName V1 SYMATTR Value 12 SYMBOL res 384 -144 R0 SYMATTR InstName R2 SYMATTR Value 1k SYMBOL res 384 192 R0 SYMATTR InstName R3 SYMATTR Value 1Meg SYMBOL diode 384 80 R0 SYMATTR InstName D1 SYMATTR Value 1N4148 SYMBOL diode 160 48 R270 WINDOW 0 32 32 VTop 0 WINDOW 3 0 32 VBottom 0 SYMATTR InstName D2 SYMATTR Value 1N4148 TEXT -258 408 Left 0 !.tran 0 250m 0 50u uic