Version 4
SHEET 1 880 680
WIRE -224 -240 -448 -240
WIRE 0 -240 -224 -240
WIRE 128 -240 0 -240
WIRE 272 -240 128 -240
WIRE 400 -240 272 -240
WIRE 624 -240 400 -240
WIRE -224 -192 -224 -240
WIRE 0 -192 0 -240
WIRE 128 -192 128 -240
WIRE 272 -192 272 -240
WIRE 400 -192 400 -240
WIRE 624 -192 624 -240
WIRE -224 -80 -224 -112
WIRE 0 -80 0 -112
WIRE -224 -64 -224 -80
WIRE 0 -64 0 -80
WIRE 400 -64 400 -112
WIRE 624 -64 624 -112
WIRE -224 48 -224 0
WIRE 624 48 624 0
WIRE -448 64 -448 -240
WIRE -128 96 -160 96
WIRE -96 96 -128 96
WIRE 0 96 0 0
WIRE 0 96 -32 96
WIRE 32 96 0 96
WIRE 128 96 128 -112
WIRE 128 96 96 96
WIRE 272 96 272 -112
WIRE 304 96 272 96
WIRE 400 96 400 0
WIRE 400 96 368 96
WIRE 432 96 400 96
WIRE 528 96 496 96
WIRE 560 96 528 96
WIRE 0 144 0 96
WIRE 400 144 400 96
WIRE -128 160 -128 96
WIRE 528 160 528 96
WIRE 160 192 272 96
WIRE 160 192 64 192
WIRE 240 192 128 96
WIRE 336 192 240 192
WIRE -448 304 -448 144
WIRE -224 304 -224 144
WIRE -128 304 -128 240
WIRE 0 304 0 240
WIRE 400 304 400 240
WIRE 528 304 528 240
WIRE 624 304 624 144
FLAG -128 304 0
FLAG -224 304 0
FLAG 0 304 0
FLAG 400 304 0
FLAG 528 304 0
FLAG 624 304 0
FLAG -448 304 0
FLAG -224 -80 Short
FLAG 0 -80 Long
SYMBOL npn 336 144 R0
SYMATTR InstName Q1
SYMATTR Value BC547B
SYMBOL npn 64 144 M0
SYMATTR InstName Q2
SYMATTR Value BC547B
SYMBOL npn 560 48 R0
SYMATTR InstName Q3
SYMATTR Value BC547B
SYMBOL npn -160 48 M0
SYMATTR InstName Q4
SYMATTR Value BC547B
SYMBOL res -16 -208 R0
SYMATTR InstName R1
SYMATTR Value 2k2
SYMBOL res 112 -208 R0
SYMATTR InstName R2
SYMATTR Value 22k
SYMBOL res 256 -208 R0
SYMATTR InstName R3
SYMATTR Value 22k
SYMBOL res 384 -208 R0
SYMATTR InstName R4
SYMATTR Value 2k2
SYMBOL res -240 -208 R0
SYMATTR InstName R5
SYMATTR Value 470
SYMBOL res -144 144 R0
SYMATTR InstName R6
SYMATTR Value 1k
SYMBOL res 608 -208 R0
SYMATTR InstName R7
SYMATTR Value 470
SYMBOL res 512 144 R0
SYMATTR InstName R8
SYMATTR Value 1k
SYMBOL cap 96 80 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C1
SYMATTR Value 10µ ic=0
SYMBOL cap 368 80 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C2
SYMATTR Value 10µ
SYMBOL cap -32 80 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C3
SYMATTR Value 10µ
SYMBOL cap 496 80 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C4
SYMATTR Value 10µ
SYMBOL diode -240 -64 R0
SYMATTR InstName D1
SYMBOL diode 608 -64 R0
SYMATTR InstName D2
SYMBOL voltage -448 48 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V1
SYMATTR Value 9V
SYMBOL diode -16 -64 R0
SYMATTR InstName D3
SYMBOL diode 384 -64 R0
SYMATTR InstName D4
TEXT -268 328 Left 2 !.tran 1