Version 4
SHEET 1 880 680
WIRE -368 -256 -480 -256
WIRE -208 -256 -368 -256
WIRE -368 -224 -368 -256
WIRE -208 -224 -208 -256
WIRE -368 -128 -368 -144
WIRE -208 -128 -208 -144
WIRE -320 -64 -336 -64
WIRE -368 -32 -368 -64
WIRE -208 0 -208 -64
WIRE -32 0 -208 0
WIRE -208 32 -208 0
WIRE -32 48 -32 0
WIRE -368 80 -368 48
WIRE -272 80 -368 80
WIRE -1008 128 -1008 64
WIRE -880 128 -880 64
WIRE -208 192 -208 128
WIRE -32 192 -32 128
FLAG -1008 128 0
FLAG -1008 -16 Vers
FLAG -480 -256 Vers
FLAG -208 192 0
FLAG -240 -80 C
FLAG -880 128 0
FLAG -880 -16 Schal
FLAG -416 -16 Schal
FLAG -416 32 0
FLAG -32 192 0
SYMBOL res -224 -240 R0
SYMATTR InstName R3
SYMATTR Value 1k
SYMBOL npn -272 32 R0
WINDOW 0 58 35 Left 2
SYMATTR InstName Q1
SYMATTR Value BC546B
SYMBOL res -384 -240 R0
SYMATTR InstName R4
SYMATTR Value 100k
SYMBOL voltage -1008 -32 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
WINDOW 3 24 44 Left 2
SYMATTR Value 9
SYMATTR InstName V_1
SYMBOL LED -224 -128 R0
SYMATTR InstName D1
SYMBOL LED -384 -128 R0
SYMATTR InstName D2
SYMBOL sw -368 64 M180
SYMATTR InstName S1
SYMATTR Value SCA_W
SYMBOL voltage -880 -32 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V_2
SYMATTR Value PULSE(0 1 1 0 0 1 2 4)
SYMBOL res -48 32 R0
SYMATTR InstName R1
SYMATTR Value 1Meg
TEXT -1088 296 Left 2 !.tran 0 15 0.0 startup
TEXT -1072 -352 Left 2 ;https://www.mikrocontroller.net/topic/450226#new
TEXT -1096 248 Left 2 !.model SCA_W SW(Ron=.1 Roff=1Meg Vt=0.5  Vh=-.5 )