Version 4
SHEET 1 1880 680
WIRE 1376 -240 1024 -240
WIRE 1824 -240 1376 -240
WIRE 1376 -128 1376 -240
WIRE 1824 32 1824 -240
WIRE 1376 48 1376 -48
WIRE 1504 48 1376 48
WIRE 1024 128 1024 -240
WIRE 1824 160 1824 112
WIRE 1376 208 1376 48
WIRE 1024 256 1024 208
WIRE 1312 256 1024 256
WIRE 1024 368 1024 256
WIRE 1040 368 1024 368
WIRE 1200 416 1104 416
WIRE 1376 416 1376 304
WIRE 1376 416 1280 416
WIRE 1632 416 1376 416
WIRE 1744 416 1632 416
WIRE 1744 448 1744 416
WIRE 1376 512 1376 416
WIRE 1040 624 1040 464
WIRE 1376 624 1376 592
WIRE 1744 640 1744 528
FLAG 1040 624 0
FLAG 1376 624 0
FLAG 1824 160 0
FLAG 1744 640 0
FLAG 1504 48 Out
FLAG 1632 416 0V_3V3_Z
SYMBOL npn 1312 208 R0
SYMATTR InstName Q2
SYMATTR Value BC846B
SYMBOL npn 1104 368 M0
SYMATTR InstName Q1
SYMATTR Value BC846B
SYMBOL res 1360 496 R0
SYMATTR InstName R4
SYMATTR Value 820
SYMBOL res 1008 112 R0
SYMATTR InstName R1
SYMATTR Value 3.3k
SYMBOL res 1360 -144 R0
SYMATTR InstName R3
SYMATTR Value 3.3k
SYMBOL voltage 1824 16 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V3
SYMATTR Value 5V
SYMBOL voltage 1744 432 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V1
SYMATTR Value 3.3V
SYMBOL res 1296 400 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R2
SYMATTR Value 1k
TEXT 952 648 Left 2 !.tran 1s