Version 4
SHEET 1 880 680
WIRE -16 0 -192 0
WIRE 128 0 -16 0
WIRE 240 0 128 0
WIRE 384 0 240 0
WIRE 544 0 384 0
WIRE -192 32 -192 0
WIRE 240 32 240 0
WIRE 384 32 384 0
WIRE -16 112 -16 0
WIRE 368 144 96 144
WIRE 384 144 384 96
WIRE 384 144 368 144
WIRE -192 160 -192 112
WIRE -128 160 -192 160
WIRE -80 160 -128 160
WIRE 96 192 96 144
WIRE 384 192 384 144
WIRE 240 240 240 112
WIRE 240 240 224 240
WIRE 272 240 240 240
WIRE 320 240 272 240
WIRE -192 256 -192 160
WIRE -16 288 -16 208
WIRE 80 288 -16 288
WIRE 96 288 96 272
WIRE 96 288 80 288
WIRE 160 288 96 288
WIRE -192 400 -192 336
WIRE -16 400 -16 368
WIRE -16 400 -192 400
WIRE 224 400 224 336
WIRE 224 400 -16 400
WIRE 384 400 384 288
WIRE 384 400 224 400
WIRE 432 400 384 400
WIRE 544 400 544 80
WIRE 544 400 432 400
WIRE 432 480 432 400
FLAG 432 480 0
DATAFLAG 128 0 ""
DATAFLAG -128 160 ""
DATAFLAG 80 288 ""
DATAFLAG 272 240 ""
DATAFLAG 368 144 ""
SYMBOL LED 368 32 R0
SYMATTR InstName D1
SYMATTR Value AOT-2015
SYMATTR Description Diode
SYMATTR Type diode
SYMBOL res 224 16 R0
SYMATTR InstName R3
SYMATTR Value 6800
SYMBOL res -208 16 R0
SYMATTR InstName Rt
SYMATTR Value 500
SYMBOL res -32 272 R0
WINDOW 0 44 69 Left 2
WINDOW 3 48 40 Left 2
SYMATTR InstName R1
SYMATTR Value 15k
SYMBOL res 80 176 R0
WINDOW 0 -35 10 Left 2
SYMATTR InstName R4
SYMATTR Value 39k
SYMBOL pnp -80 208 M180
WINDOW 0 41 37 Left 2
WINDOW 3 44 68 Left 2
SYMATTR InstName Q1
SYMATTR Value BC327-25
SYMBOL npn 160 240 R0
SYMATTR InstName Q2
SYMATTR Value BC337-25
SYMBOL npn 320 192 R0
SYMATTR InstName Q3
SYMATTR Value BC337-25
SYMBOL voltage 544 -16 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V1
SYMATTR Value 3
SYMBOL res -208 240 R0
SYMATTR InstName Rp1
SYMATTR Value 10000
TEXT -210 504 Left 2 !.op