Version 4
SHEET 1 880 680
WIRE -16 96 -176 96
WIRE 112 96 -16 96
WIRE 336 96 208 96
WIRE 464 96 336 96
WIRE -176 176 -176 96
WIRE 464 176 464 96
WIRE 336 192 336 96
WIRE -16 224 -16 96
WIRE 16 224 -16 224
WIRE 160 224 160 160
WIRE 160 224 96 224
WIRE 160 272 160 224
WIRE -176 304 -176 256
WIRE 336 304 336 256
WIRE 464 304 464 256
WIRE 160 384 160 336
FLAG 160 384 0
FLAG 336 304 0
FLAG 464 304 0
FLAG -176 304 0
SYMBOL npn 112 160 R270
SYMATTR InstName Q1
SYMATTR Value BC547B
SYMBOL res 112 208 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R1
SYMATTR Value 19.2k
SYMBOL zener 176 336 R180
WINDOW 0 24 64 Left 2
WINDOW 3 24 0 Left 2
SYMATTR InstName D1
SYMATTR Value PTZ6_8B
SYMATTR Description Diode
SYMATTR Type diode
SYMBOL cap 320 192 R0
SYMATTR InstName C1
SYMATTR Value 1µ
SYMBOL res 448 160 R0
SYMATTR InstName R2
SYMATTR Value 120
SYMBOL voltage -176 160 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V1
SYMATTR Value 12
TEXT 128 -56 Left 2 !.tran 1s