Version 4 SHEET 1 1556 680 WIRE 1440 -416 1280 -416 WIRE -64 -320 -464 -320 WIRE 272 -320 -64 -320 WIRE 448 -320 272 -320 WIRE 640 -320 448 -320 WIRE 736 -320 688 -320 WIRE 1280 -320 1280 -336 WIRE 1280 -320 896 -320 WIRE -464 -304 -464 -320 WIRE -256 -272 -384 -272 WIRE 64 -272 -144 -272 WIRE 112 -272 64 -272 WIRE 400 -272 224 -272 WIRE -256 -256 -256 -272 WIRE 448 -240 448 -320 WIRE 112 -224 112 -272 WIRE 640 -176 640 -320 WIRE 736 -176 640 -176 WIRE 1104 -176 896 -176 WIRE 1280 -176 1280 -320 WIRE 1440 -176 1440 -416 WIRE -64 -160 -64 -320 WIRE 272 -160 272 -320 WIRE -384 -144 -384 -272 WIRE -144 -144 -144 -192 WIRE -96 -144 -144 -144 WIRE 224 -144 224 -192 WIRE 240 -144 224 -144 WIRE 1104 -144 1104 -176 WIRE 64 -128 64 -272 WIRE 64 -128 -32 -128 WIRE 400 -128 400 -272 WIRE 400 -128 304 -128 WIRE 512 -128 400 -128 WIRE 688 -128 688 -320 WIRE 688 -128 592 -128 WIRE -256 -112 -256 -176 WIRE -96 -112 -256 -112 WIRE 112 -112 112 -144 WIRE 240 -112 112 -112 WIRE -384 -16 -384 -64 WIRE -64 -16 -64 -96 WIRE -64 -16 -384 -16 WIRE 112 -16 112 -32 WIRE 112 -16 -64 -16 WIRE 272 -16 272 -96 WIRE 272 -16 112 -16 WIRE 448 -16 448 -176 WIRE 448 -16 272 -16 WIRE 736 -16 448 -16 WIRE 1104 -16 1104 -64 WIRE 1104 -16 896 -16 WIRE 1104 0 1104 -16 WIRE 1280 0 1280 -112 WIRE 1440 0 1440 -96 FLAG 736 -320 SIG FLAG 736 -176 +5V FLAG 736 -16 0 FLAG 1104 0 0 FLAG 896 -176 +5V FLAG -256 -272 MPXout FLAG 1440 0 0 FLAG 896 -320 SIG FLAG 1280 0 0 FLAG 896 -16 0 SYMBOL voltage -384 -160 R0 WINDOW 3 -141 198 Left 2 WINDOW 123 0 0 Left 2 WINDOW 39 0 0 Left 2 SYMATTR InstName V1 SYMATTR Value PULSE(0.1V 4.6V 0 1ms 1ms 40ms 82ms) SYMBOL res 496 -112 R270 WINDOW 0 32 56 VTop 2 WINDOW 3 0 56 VBottom 2 SYMATTR InstName R1 SYMATTR Value 470 SYMBOL res -272 -272 R0 SYMATTR InstName R2 SYMATTR Value 100k SYMBOL cap 432 -240 R0 SYMATTR InstName C1 SYMATTR Value 0.1µF SYMBOL res -160 -288 R0 SYMATTR InstName R3 SYMATTR Value 100k SYMBOL res 96 -240 R0 SYMATTR InstName R4 SYMATTR Value 47k SYMBOL res 96 -128 R0 SYMATTR InstName R5 SYMATTR Value 100k SYMBOL res 208 -288 R0 SYMATTR InstName R6 SYMATTR Value 100k SYMBOL voltage 1104 -160 R0 WINDOW 123 0 0 Left 2 WINDOW 39 0 0 Left 2 SYMATTR InstName V2 SYMATTR Value 5V SYMBOL Opamps\\LT6002 -64 -128 R0 SYMATTR InstName OPAMP_B SYMBOL Opamps\\LT6002 272 -128 R0 SYMATTR InstName OPAMP_A SYMBOL voltage 1440 -192 R0 WINDOW 123 0 0 Left 2 WINDOW 39 0 0 Left 2 SYMATTR InstName V3 SYMATTR Value 3.3V SYMBOL res 1264 -432 R0 SYMATTR InstName R7 SYMATTR Value 4.7k SYMBOL cap 1264 -176 R0 SYMATTR InstName C2 SYMATTR Value 10µF TEXT 768 -472 Left 2 ;Connector TEXT 1038 114 Left 2 !.tran 100ms startup TEXT -512 -352 Left 2 ;MPXV5050VC6T1 TEXT 1176 -472 Left 2 ;Smoothieboard TEXT -224 -504 Left 2 ;See \nhttps://makr.zone/vacuum-sensor/192/ TEXT -592 -472 Left 2 ;Vacuum Sensor Board LINE Normal 704 64 704 -448 2 LINE Normal 928 64 704 64 2 LINE Normal 928 -448 928 64 2 LINE Normal 704 -448 928 -448 2 RECTANGLE Normal -320 16 -608 -304 2 RECTANGLE Normal 1552 64 1024 -448 2 RECTANGLE Normal -672 64 704 -448 2 CIRCLE Normal -448 -96 -560 -208 2 CIRCLE Normal -480 -128 -528 -176 2