Version 4
SHEET 1 880 680
WIRE 320 16 -288 16
WIRE 528 16 320 16
WIRE -288 208 -288 16
WIRE 320 224 320 16
WIRE 256 272 224 272
WIRE 528 272 528 16
WIRE -128 320 -128 256
WIRE 16 320 -128 320
WIRE 144 320 96 320
WIRE 160 320 144 320
WIRE 320 368 320 320
WIRE 320 368 224 368
WIRE 144 416 144 320
WIRE -128 432 -128 320
WIRE 224 464 208 464
WIRE 320 464 320 368
WIRE 320 464 304 464
WIRE 320 480 320 464
WIRE -288 576 -288 288
WIRE -128 576 -128 512
WIRE 144 576 144 512
WIRE 320 576 320 560
WIRE 528 576 528 336
FLAG -288 576 0
FLAG -128 576 0
FLAG 320 576 0
FLAG 528 576 0
FLAG 528 16 C1
FLAG -128 256 MCU
FLAG 144 576 0
SYMBOL res 304 464 R0
SYMATTR InstName R1
SYMATTR Value .14
SYMBOL npn 208 416 M0
SYMATTR InstName Q3
SYMATTR Value BC549C
SYMBOL res 320 448 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R2
SYMATTR Value 100
SYMBOL voltage -288 192 R0
WINDOW 3 25 95 Left 2
WINDOW 123 0 0 Left 2
WINDOW 39 20 -23 Left 2
SYMATTR Value 60
SYMATTR SpiceLine Rser=100K
SYMATTR InstName V1
SYMBOL voltage -128 416 R0
WINDOW 3 -38 220 Left 2
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR Value PULSE(0 5 1 20n 20n 6m)
SYMATTR InstName MCU
SYMBOL cap 544 336 R180
WINDOW 0 24 56 Left 2
WINDOW 3 24 8 Left 2
SYMATTR InstName C1
SYMATTR Value 330µ
SYMBOL res 112 304 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R3
SYMATTR Value 470
SYMBOL npn 160 272 R0
SYMATTR InstName Q1
SYMATTR Value BD139
SYMBOL pnp 256 320 M180
SYMATTR InstName Q2
SYMATTR Value MJE2955
TEXT -184 72 Left 2 !.tran 0 1.007 .999