Version 4 SHEET 1 880 680 WIRE 240 192 192 192 WIRE 384 192 336 192 WIRE 32 240 0 240 WIRE 128 240 112 240 WIRE 272 240 128 240 WIRE 192 352 192 288 WIRE 336 352 336 288 FLAG 192 352 0 FLAG 240 192 C1 IOPIN 240 192 Out FLAG 0 240 A IOPIN 0 240 In FLAG 336 352 0 FLAG 384 192 C2 IOPIN 384 192 Out SYMBOL npn 128 192 R0 SYMATTR InstName Q1 SYMATTR Value 2N2222 SYMBOL res 16 256 R270 WINDOW 0 32 56 VTop 2 WINDOW 3 0 56 VBottom 2 SYMATTR InstName R1 SYMATTR Value {RB} SYMBOL npn 272 192 R0 SYMATTR InstName Q2 SYMATTR Value 2N2222