v 20070708 1
C 40000 40000 0 0 0 title-B.sym
N 51900 46400 52300 46400 4
N 48000 49200 48000 46700 4
N 52300 46600 52100 46600 4
N 52300 45600 52100 45600 4
N 52100 45600 52100 42100 4
N 53900 42800 53900 42200 4
C 52400 41700 1 0 0 gnd-1.sym
N 53700 46100 54300 46100 4
N 47800 47000 47800 50300 4
N 41700 47000 41200 47000 4
C 48200 48000 1 0 0 vcc-1.sym
N 47500 47000 47800 47000 4
N 47500 46400 47800 46400 4
N 47800 46400 47800 42300 4
C 56200 41700 1 0 0 gnd-1.sym
C 52000 49200 1 90 0 capacitor-1.sym
{
T 51300 49400 5 10 0 0 90 0 1
device=CAPACITOR
T 51500 49700 5 10 1 1 180 0 1
refdes=C3
T 51100 49400 5 10 0 0 90 0 1
symversion=0.1
T 51700 50000 5 10 1 1 180 0 1
value=1nF
}
C 52000 42100 1 90 0 capacitor-1.sym
{
T 51300 42300 5 10 0 0 90 0 1
device=CAPACITOR
T 51500 42600 5 10 1 1 180 0 1
refdes=C4
T 51100 42300 5 10 0 0 90 0 1
symversion=0.1
T 51700 42900 5 10 1 1 180 0 1
value=1nF
}
T 45300 50600 9 10 1 0 0 0 1
Calibrate
T 56000 43200 9 10 1 0 0 0 2
Analogue
0 to 2.5V
C 40200 45400 1 0 0 switch-3p2t.sym
{
T 40610 45850 5 10 0 0 0 0 1
device=Dual_Two_Way_Switch
T 40310 47500 5 10 1 1 0 0 1
refdes=S1
T 40510 45300 5 10 0 0 0 0 1
footprint=CONNECTOR 2 3
T 40900 46700 5 10 0 0 0 0 1
symversion=1.0
}
N 42700 42600 43300 42600 4
N 43000 42300 42700 42300 4
N 42700 42000 43100 42000 4
N 40200 45600 40200 43200 4
N 43300 42400 43000 42400 4
N 42700 41700 43200 41700 4
C 41800 41200 1 180 0 vcc-1.sym
N 45900 42800 45300 42800 4
T 47800 40400 9 10 1 0 0 0 2
Switch
Position
T 40200 46800 9 10 1 0 0 0 1
Input
T 51300 41100 9 10 1 0 0 0 1
Differential Instrumentation Amplifier
T 54000 40100 9 10 1 0 0 0 1
Ken Sarkies
T 54000 40400 9 10 1 0 0 0 1
07/05/2007
T 50300 40100 9 10 1 0 0 0 1
1
T 52000 40100 9 10 1 0 0 0 1
1
T 45700 47900 9 10 1 0 0 0 1
Analogue Switch
T 48300 44700 9 10 1 0 0 0 2
Dual 4-input
Multiplexer
T 52800 47100 9 10 1 0 0 0 2
Instrumentation
Amplifier
T 54200 43800 9 10 1 0 0 0 1
Offset
N 51900 46400 51900 49200 4
N 51900 49200 48000 49200 4
N 48800 47200 48800 50500 4
N 49000 47200 49000 50500 4
T 48700 50600 9 10 1 0 0 0 1
Gain
C 45200 44100 1 90 0 gnd-1.sym
C 40600 43200 1 270 0 resistor-1.sym
{
T 41000 42900 5 10 0 0 270 0 1
device=RESISTOR
T 40300 42700 5 10 1 1 0 0 1
refdes=R8
T 40200 42400 5 10 1 1 0 0 1
value=10K
}
C 40900 42300 1 180 0 vcc-1.sym
C 42500 49800 1 90 1 resistor-1.sym
{
T 42100 49500 5 10 0 0 270 2 1
device=RESISTOR
T 42200 49400 5 10 1 1 0 6 1
refdes=R2
}
C 42500 48900 1 90 1 resistor-1.sym
{
T 42100 48600 5 10 0 0 270 2 1
device=RESISTOR
T 42200 48500 5 10 1 1 0 6 1
refdes=R3
}
N 43000 50700 43000 48000 4
N 42900 47600 42900 49800 4
N 42900 49800 42400 49800 4
N 41700 47000 41700 50700 4
N 43100 44000 43100 42000 4
N 43900 44400 43000 44400 4
N 43000 44400 43000 42300 4
N 43900 44800 42900 44800 4
N 42900 44800 42900 42600 4
C 50600 48400 1 90 1 resistor-1.sym
{
T 50200 48100 5 10 0 0 270 2 1
device=RESISTOR
T 50300 48000 5 10 1 1 0 6 1
refdes=R12
}
C 50800 49000 1 180 1 resistor-1.sym
{
T 51100 48600 5 10 0 0 180 6 1
device=RESISTOR
T 50700 49100 5 10 1 1 180 6 1
refdes=R10
}
C 50800 48500 1 180 1 resistor-1.sym
{
T 51100 48100 5 10 0 0 180 6 1
device=RESISTOR
T 50700 48600 5 10 1 1 180 6 1
refdes=R11
}
C 50600 47500 1 90 1 resistor-1.sym
{
T 50200 47200 5 10 0 0 270 2 1
device=RESISTOR
T 50300 47100 5 10 1 1 0 6 1
refdes=R13
}
C 50600 46600 1 90 1 resistor-1.sym
{
T 50200 46300 5 10 0 0 270 2 1
device=RESISTOR
T 50300 46200 5 10 1 1 0 6 1
refdes=R14
}
C 50600 45700 1 90 1 resistor-1.sym
{
T 50200 45400 5 10 0 0 270 2 1
device=RESISTOR
T 50300 45300 5 10 1 1 0 6 1
refdes=R15
}
C 50600 44800 1 90 1 resistor-1.sym
{
T 50200 44500 5 10 0 0 270 2 1
device=RESISTOR
T 50300 44400 5 10 1 1 0 6 1
refdes=R16
}
C 50800 44000 1 180 1 resistor-1.sym
{
T 51100 43600 5 10 0 0 180 6 1
device=RESISTOR
T 50700 44100 5 10 1 1 180 6 1
refdes=R17
}
C 50800 43500 1 180 1 resistor-1.sym
{
T 51100 43100 5 10 0 0 180 6 1
device=RESISTOR
T 50700 43600 5 10 1 1 180 6 1
refdes=R18
}
N 49500 45400 49500 43400 4
N 49500 43400 50800 43400 4
N 51700 43400 51700 46000 4
N 51700 46000 52300 46000 4
N 51700 48900 51700 46200 4
N 51700 46200 52300 46200 4
N 50800 48900 49500 48900 4
N 49500 48900 49500 46200 4
N 49600 46400 49600 48400 4
N 49600 48400 50800 48400 4
N 49600 45600 49600 43900 4
N 49600 43900 50800 43900 4
N 49700 46600 49700 47500 4
N 49700 47500 50500 47500 4
N 49700 45800 49700 44800 4
N 49700 44800 50500 44800 4
N 49500 45400 49400 45400 4
N 49600 45600 49400 45600 4
N 49700 45800 49400 45800 4
N 49400 46200 49500 46200 4
N 49400 46400 49600 46400 4
N 49400 46600 49700 46600 4
N 49800 45700 50500 45700 4
N 49800 45700 49800 46000 4
N 49800 46000 49400 46000 4
N 49400 46800 49800 46800 4
N 49800 46800 49800 46600 4
N 49800 46600 50500 46600 4
N 52300 45800 51900 45800 4
N 51900 45800 51900 43000 4
N 51900 43000 48000 43000 4
N 48000 43000 48000 45600 4
C 42500 44300 1 90 0 resistor-1.sym
{
T 42100 44600 5 10 0 0 90 0 1
device=RESISTOR
T 42200 44700 5 10 1 1 180 0 1
refdes=R7
}
C 42500 45200 1 90 0 resistor-1.sym
{
T 42100 45500 5 10 0 0 90 0 1
device=RESISTOR
T 42200 45600 5 10 1 1 180 0 1
refdes=R6
}
N 43900 46000 42700 46000 4
N 42700 46000 42700 44300 4
N 42700 44300 42400 44300 4
N 42800 46400 42800 43400 4
C 42800 40500 1 0 0 gnd-1.sym
N 42900 40800 43300 40800 4
C 53200 45400 1 0 0 gnd-1.sym
T 46000 48200 9 10 1 0 0 0 1
Calibration
N 55800 43000 56600 43000 4
N 53900 42200 54900 42200 4
N 54900 42200 54900 43000 4
N 53900 44200 53900 43200 4
C 54900 42900 1 0 0 resistor-1.sym
{
T 55200 43300 5 10 0 0 0 0 1
device=RESISTOR
T 55100 43400 5 10 1 1 0 0 1
refdes=R24
T 55100 43200 5 10 1 1 0 0 1
value=10K
}
C 55900 42100 1 90 0 resistor-1.sym
{
T 55500 42400 5 10 0 0 90 0 1
device=RESISTOR
T 55600 42500 5 10 1 1 180 0 1
refdes=R25
T 55400 42100 5 10 1 1 0 0 1
value=10K
}
C 55700 41700 1 0 0 gnd-1.sym
C 54000 45100 1 90 1 resistor-1.sym
{
T 53600 44800 5 10 0 0 270 2 1
device=RESISTOR
T 53700 44700 5 10 1 1 0 6 1
refdes=R21
T 53400 44500 5 10 1 1 0 0 1
value=100K
}
N 53900 46100 53900 46500 4
N 53300 46500 53900 46500 4
C 54300 46000 1 0 0 resistor-1.sym
{
T 54600 46400 5 10 0 0 0 0 1
device=RESISTOR
T 54500 45600 5 10 1 1 0 0 1
value=20K
T 54500 45800 5 10 1 1 0 0 1
refdes=R19
}
C 55600 44200 1 90 0 resistor-1.sym
{
T 55200 44500 5 10 0 0 90 0 1
device=RESISTOR
T 55300 44600 5 10 1 1 180 0 1
refdes=R20
T 54900 44200 5 10 1 1 0 0 1
value=10K
}
C 55400 43900 1 0 0 gnd-1.sym
N 55500 45400 53900 45400 4
N 55500 46100 55200 46100 4
N 53900 45100 53900 45400 4
N 55500 45100 55500 46100 4
C 52300 44200 1 0 0 vdd-1.sym
C 52600 44200 1 90 1 resistor-1.sym
{
T 52200 43900 5 10 0 0 270 2 1
device=RESISTOR
T 53000 43800 5 10 1 1 0 6 1
refdes=R26
T 52700 43600 5 10 1 1 0 0 1
value=20K
}
N 45300 46400 45300 50500 4
C 42500 50700 1 90 1 resistor-1.sym
{
T 42100 50400 5 10 0 0 270 2 1
device=RESISTOR
T 42200 50300 5 10 1 1 0 6 1
refdes=R1
}
C 41600 49800 1 90 0 capacitor-1.sym
{
T 40900 50000 5 10 0 0 90 0 1
device=CAPACITOR
T 41100 50300 5 10 1 1 180 0 1
refdes=C1
T 40700 50000 5 10 0 0 90 0 1
symversion=0.1
T 41300 50600 5 10 1 1 180 0 1
value=0.1uF
}
N 41400 50700 43000 50700 4
N 41400 49800 41400 47400 4
N 43900 45200 42900 45200 4
N 42900 46100 42400 46100 4
N 42800 47200 42800 48900 4
N 42800 48900 42400 48900 4
C 44900 48100 1 180 0 switch-3p4t.sym
{
T 44490 47550 5 10 0 0 180 0 1
device=Dual_Two_Way_Switch
T 44790 43900 5 10 1 1 180 0 1
refdes=S2
T 44590 48100 5 10 0 0 180 0 1
footprint=CONNECTOR 2 3
T 44200 46700 5 10 0 0 180 0 1
symversion=1.0
}
C 42500 43400 1 90 0 resistor-1.sym
{
T 42100 43700 5 10 0 0 90 0 1
device=RESISTOR
T 42200 43800 5 10 1 1 180 0 1
refdes=R8
}
N 42900 46100 42900 45200 4
N 42700 46800 42700 48000 4
N 43900 44000 43100 44000 4
N 43200 42000 43300 42000 4
C 41100 45100 1 0 0 gnd-1.sym
C 41600 43400 1 90 0 capacitor-1.sym
{
T 40900 43600 5 10 0 0 90 0 1
device=CAPACITOR
T 41100 43900 5 10 1 1 180 0 1
refdes=C2
T 40700 43600 5 10 0 0 90 0 1
symversion=0.1
T 41300 44200 5 10 1 1 180 0 1
value=0.1uF
}
N 42400 45200 42600 45200 4
N 42600 45200 42600 45600 4
N 41200 46200 41400 46200 4
N 41400 46200 41400 44300 4
N 41200 46600 41700 46600 4
N 41700 46600 41700 43400 4
N 41400 43400 42800 43400 4
N 41400 47400 41200 47400 4
N 44900 47700 47500 47700 4
N 47500 47700 47500 47200 4
N 44900 45800 47500 45800 4
N 47500 45800 47500 46200 4
N 47500 46800 47500 46600 4
N 45300 46400 45400 46400 4
N 45300 47000 45400 47000 4
N 52500 43200 53000 43200 4
C 42700 42700 1 90 1 resistorpack5-1.sym
{
T 41300 42600 5 10 0 0 270 2 1
device=RESISTORPACK_5
T 41700 42900 5 10 1 1 0 2 1
refdes=RP1
}
C 43300 38400 1 0 0 74148-2.sym
{
T 43600 43340 5 10 0 0 0 0 1
device=74148
T 43600 43140 5 10 0 0 0 0 1
footprint=DIP16
T 45000 43000 5 10 1 1 0 6 1
refdes=U2
}
N 43200 41700 43200 43600 4
N 43300 42200 43100 42200 4
C 45400 45100 1 0 0 AD7512-2.sym
{
T 45700 47650 5 10 0 0 0 0 1
device=4066
T 47200 47500 5 10 1 1 0 6 1
refdes=U1
T 45700 47850 5 10 0 0 0 0 1
footprint=DIP14
}
N 45300 42400 45900 42400 4
N 40200 43200 45900 43200 4
N 45900 43400 45600 43400 4
N 45600 43400 45600 40400 4
N 45900 43000 45700 43000 4
N 45700 43000 45700 40400 4
N 45900 42600 45800 42600 4
N 45800 42600 45800 40400 4
C 47000 44000 1 180 0 gnd-1.sym
C 49400 45200 1 0 1 ADG409-1.sym
{
T 48775 46150 5 8 0 0 0 6 1
device=LM741
T 49300 47200 5 10 1 1 0 6 1
refdes=U4
}
N 47300 43300 47700 43300 4
N 47700 43300 47700 40400 4
N 47300 43000 47500 43000 4
N 47500 43000 47500 40400 4
N 47300 42600 47600 42600 4
N 47600 42600 47600 40400 4
T 46000 40400 9 10 1 0 0 0 2
From other
Channel
N 46300 43800 46300 45400 4
N 46300 45400 45100 45400 4
N 45100 45400 45100 50500 4
T 44400 50400 9 10 1 0 0 0 2
Channel
      A/B
C 45800 44500 1 180 0 vcc-1.sym
C 45300 49500 1 0 0 resistor-1.sym
{
T 45600 49900 5 10 0 0 0 0 1
device=RESISTOR
T 45500 49200 5 10 1 1 0 0 1
refdes=R28
T 45500 49000 5 10 1 1 0 0 1
value=10K
}
C 46200 49800 1 270 0 vcc-1.sym
C 45500 45400 1 270 0 resistor-1.sym
{
T 45900 45100 5 10 0 0 270 0 1
device=RESISTOR
T 45800 44900 5 10 1 1 0 0 1
refdes=R9
T 45800 44700 5 10 1 1 0 0 1
value=10K
}
N 43000 48000 43900 48000 4
N 43200 43600 43900 43600 4
N 42800 47200 43900 47200 4
N 42700 46800 43900 46800 4
N 42900 47600 43900 47600 4
N 42800 46400 43900 46400 4
N 42600 45600 43900 45600 4
N 42400 48000 42700 48000 4
N 45300 42800 45300 42600 4
N 44900 47400 44900 47700 4
N 51000 50100 52100 50100 4
N 52100 46600 52100 50100 4
N 51100 42100 52100 42100 4
N 50100 42300 47800 42300 4
N 50000 50300 47800 50300 4
N 50000 49900 50000 49600 4
N 50000 49600 51000 49600 4
N 51000 49600 51000 50100 4
N 50100 41900 50100 41500 4
N 50100 41500 51100 41500 4
N 51100 41500 51100 42100 4
C 42500 46600 1 90 0 resistor-1.sym
{
T 42100 46900 5 10 0 0 90 0 1
device=RESISTOR
T 42200 47100 5 10 1 1 180 0 1
refdes=R5
}
N 42400 48000 42400 47500 4
N 42400 46600 42400 46100 4
C 46900 49000 1 0 0 resistor-1.sym
{
T 47200 49400 5 10 0 0 0 0 1
device=RESISTOR
T 47100 48700 5 10 1 1 0 0 1
refdes=R29
T 47100 48500 5 10 1 1 0 0 1
value=10M
}
C 46900 44900 1 0 0 resistor-1.sym
{
T 47200 45300 5 10 0 0 0 0 1
device=RESISTOR
T 47100 44600 5 10 1 1 0 0 1
refdes=R30
T 47100 44400 5 10 1 1 0 0 1
value=10M
}
C 46600 49200 1 270 0 gnd-1.sym
C 46600 45100 1 270 0 gnd-1.sym
C 52300 45400 1 0 0 AD625-1.sym
{
T 52925 46350 5 8 0 0 0 0 1
device=LM741
T 52700 46900 5 10 1 1 0 0 1
refdes=U5
}
C 53000 43100 1 0 0 resistor-1.sym
{
T 53300 43500 5 10 0 0 0 0 1
device=RESISTOR
T 53400 42800 5 10 1 1 0 0 1
refdes=R22
T 53400 42600 5 10 1 1 0 0 1
value=100K
}
N 52500 42800 52500 43300 4
C 48300 48000 1 270 0 resistor-1.sym
{
T 48700 47700 5 10 0 0 270 0 1
device=RESISTOR
T 48200 48800 5 10 1 1 0 0 1
refdes=R31
T 48200 48600 5 10 1 1 0 0 1
value=10K
}
C 45900 41800 1 0 0 74157-2.sym
{
T 46525 42750 5 8 0 0 0 0 1
device=74LS157
T 46000 43800 5 10 1 1 0 0 1
refdes=U3
}
N 43300 41800 43300 41200 4
N 43300 41200 42900 41200 4
C 42000 41100 1 0 0 resistor-1.sym
{
T 42300 41500 5 10 0 0 0 0 1
device=RESISTOR
T 42200 40800 5 10 1 1 0 0 1
refdes=R32
T 42200 40600 5 10 1 1 0 0 1
value=10K
}
N 42000 41200 41600 41200 4
C 52400 42800 1 270 0 zener-3.sym
{
T 53800 43400 5 10 0 0 270 0 1
device=ZENER_DIODE
T 52900 42450 5 10 1 1 180 0 1
refdes=Z1
T 52700 42100 5 10 1 1 0 0 1
value=5.6V
}
C 56500 42000 1 90 0 diode-4.sym
{
T 55900 42400 5 10 0 0 90 0 1
device=DIODE
T 56700 42500 5 10 1 1 180 0 1
refdes=D1
}
N 56300 42000 56300 42100 4
N 56300 42700 56300 43000 4
N 55800 42000 55800 42100 4
C 50000 49700 1 0 0 lm441.sym
{
T 50625 50650 5 8 0 0 0 0 1
device=LM441
T 50200 50600 5 10 1 1 0 0 1
refdes=U1
}
C 53900 42600 1 0 0 lm441.sym
{
T 54525 43550 5 8 0 0 0 0 1
device=LM441
T 54100 43500 5 10 1 1 0 0 1
refdes=U3
}
C 50100 41700 1 0 0 lm441.sym
{
T 50725 42650 5 8 0 0 0 0 1
device=LM441
T 50300 42600 5 10 1 1 0 0 1
refdes=U2
}