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EESchema Schematic File Version 2
LIBS:power
LIBS:device
LIBS:transistors
LIBS:conn
LIBS:linear
LIBS:regul
LIBS:74xx
LIBS:cmos4000
LIBS:adc-dac
LIBS:memory
LIBS:xilinx
LIBS:special
LIBS:microcontrollers
LIBS:dsp
LIBS:microchip
LIBS:analog_switches
LIBS:motorola
LIBS:texas
LIBS:intel
LIBS:audio
LIBS:interface
LIBS:digital-audio
LIBS:philips
LIBS:display
LIBS:cypress
LIBS:siliconi
LIBS:opto
LIBS:atmel
LIBS:contrib
LIBS:valves
LIBS:LettuceBuddy
LIBS:BenchBuddy
LIBS:HealthyEC-cache
EELAYER 27 0
EELAYER END
$Descr A4 11693 8268
encoding utf-8
Sheet 2 2
Title ""
Date "20 nov 2014"
Rev ""
Comp ""
Comment1 ""
Comment2 ""
Comment3 ""
Comment4 ""
$EndDescr
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F 1 "1K" V 10157 5601 40 0000 C CNN
F 2 "~" V 10080 5600 30 0000 C CNN
F 3 "~" H 10150 5600 30 0000 C CNN
1 10150 5600
1 0 0 -1
$EndComp
$Comp
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U 1 1 5416D6B8
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F 1 "1K" V 10157 6451 40 0000 C CNN
F 2 "~" V 10080 6450 30 0000 C CNN
F 3 "~" H 10150 6450 30 0000 C CNN
1 10150 6450
1 0 0 -1
$EndComp
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F 1 "AGND" H 10150 6880 50 0000 C CNN
F 2 "" H 10150 6950 60 0000 C CNN
F 3 "" H 10150 6950 60 0000 C CNN
1 10150 6950
1 0 0 -1
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F 1 "1K" V 10507 2201 40 0000 C CNN
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F 3 "~" H 10500 2200 30 0000 C CNN
1 10500 2200
0 -1 -1 0
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1 10350 3400
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F 3 "~" H 10450 1600 60 0000 C CNN
1 10450 1600
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L C C10
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F 3 "~" H 9050 4200 60 0000 C CNN
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F 3 "~" H 9650 4050 60 0000 C CNN
1 9650 4050
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F 3 "~" H 9650 4350 60 0000 C CNN
1 9650 4350
-1 0 0 -1
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F 1 "100n" H 8706 1815 40 0000 L CNN
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F 3 "~" H 8700 1900 60 0000 C CNN
1 8700 1900
-1 0 0 1
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F 3 "~" H 9100 1600 30 0000 C CNN
1 9100 1600
0 -1 -1 0
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F 3 "~" H 8250 2300 30 0000 C CNN
1 8250 2300
0 -1 -1 0
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F 2 "~" H 2000 2250 60 0000 C CNN
F 3 "~" H 2000 2250 60 0000 C CNN
1 2000 2250
-1 0 0 -1
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F 3 "~" H 1650 2600 30 0000 C CNN
1 1650 2600
1 0 0 -1
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L C C3
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F 1 "1u" H 1406 2515 40 0000 L CNN
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F 3 "~" H 1400 2600 60 0000 C CNN
1 1400 2600
1 0 0 -1
$EndComp
Text HLabel 1250 2250 0 60 Output ~ 0
EC_Meas
Text HLabel 1550 3550 2 60 Input ~ 0
VGND
Text HLabel 8150 1150 2 60 Input ~ 0
VGND
Text HLabel 8150 6150 0 60 Output ~ 0
VGND
Text HLabel 10750 3750 0 60 Input ~ 0
VGND
Text Notes 9950 1300 2 60 ~ 0
Wien Bridge Oscillator
Text Notes 8050 1050 2 60 ~ 0
Shrink Signal
Text Notes 10050 950 2 98 ~ 0
Create an AC Signal
Text Notes 9600 4950 2 98 ~ 0
Raise GND
Text Notes 6500 3500 2 60 ~ 0
Probe
Text HLabel 6400 3300 2 60 Input ~ 0
EC_Probe+
Text HLabel 6500 4350 2 60 Input ~ 0
VGND
Text GLabel 4450 2150 0 59 Output ~ 0
EC_Signal
Wire Wire Line
10150 5150 10150 5350
Wire Wire Line
10150 6700 10150 6950
Wire Wire Line
9900 4050 9850 4050
Wire Wire Line
9900 4050 9900 4350
Wire Wire Line
9900 4350 9850 4350
Wire Wire Line
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Wire Wire Line
9400 4050 9400 4350
Wire Wire Line
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Wire Wire Line
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Wire Wire Line
1250 2250 1800 2250
Wire Wire Line
1400 2250 1400 2400
Wire Wire Line
1400 2950 1650 2950
Wire Wire Line
1550 3550 1550 2950
Connection ~ 1550 2950
Connection ~ 1400 2250
Wire Wire Line
10150 5850 10150 6200
Wire Wire Line
9450 6050 10150 6050
Connection ~ 10150 6050
Wire Wire Line
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Wire Wire Line
9750 6250 9750 6850
Wire Wire Line
9750 6850 8450 6850
Wire Wire Line
8450 6850 8450 6150
Wire Wire Line
8150 6150 8750 6150
Connection ~ 8450 6150
Wire Wire Line
8500 2300 9050 2300
Wire Wire Line
10000 2400 10000 4200
Wire Wire Line
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Wire Wire Line
10100 3400 10000 3400
Connection ~ 10000 3400
Wire Wire Line
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Wire Wire Line
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Wire Wire Line
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Wire Wire Line
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Wire Notes Line
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Wire Notes Line
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Wire Notes Line
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Wire Notes Line
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Wire Notes Line
6550 3300 6550 3950
Wire Notes Line
6100 3850 6700 3450
Wire Notes Line
6700 3450 6700 3550
Wire Notes Line
6700 3450 6600 3450
Text Notes 6250 1000 2 98 ~ 0
Get EC Measurement
Wire Notes Line
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Wire Notes Line
11000 4800 11000 7100
Wire Notes Line
11000 7100 7600 7100
Wire Notes Line
7600 7100 7600 4800
Wire Notes Line
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Wire Notes Line
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Wire Notes Line
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Wire Notes Line
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Wire Notes Line
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Wire Notes Line
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Wire Notes Line
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Wire Notes Line
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Wire Wire Line
6350 3950 6350 4350
Wire Wire Line
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Text GLabel 3250 2150 2 59 Input ~ 0
EC_Signal
Wire Notes Line
3800 4500 3800 800
Wire Notes Line
900 4500 3800 4500
Wire Notes Line
900 4500 900 800
Wire Notes Line
900 800 3800 800
Wire Wire Line
7650 2300 8000 2300
Wire Wire Line
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Text Notes 3050 1000 2 98 ~ 0
Convert AC to DC
Wire Wire Line
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Wire Wire Line
3050 2350 3400 2350
Wire Wire Line
3400 2350 3400 3100
Wire Wire Line
3400 3100 1750 3100
Wire Wire Line
1750 3100 1750 2250
Connection ~ 1750 2250
$Comp
L CONN_1 TP20
U 1 1 54187FEE
P 9000 2100
F 0 "TP20" H 9080 2100 40 0000 L CNN
F 1 "CONN_1" H 9000 2155 30 0001 C CNN
F 2 "" H 9000 2100 60 0000 C CNN
F 3 "" H 9000 2100 60 0000 C CNN
1 9000 2100
1 0 0 -1
$EndComp
Wire Wire Line
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Connection ~ 8850 2300
Wire Wire Line
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Connection ~ 6050 2050
Wire Wire Line
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Connection ~ 1650 2250
Wire Wire Line
10300 5150 10150 5150
$Comp
L MCP6244 U1
U 2 1 5419C202
P 9500 2300
F 0 "U1" H 9600 2500 60 0000 L CNN
F 1 "MCP6244" H 9550 2100 60 0000 L CNN
F 2 "~" H 9600 2300 60 0000 C CNN
F 3 "~" H 9600 2300 60 0000 C CNN
2 9500 2300
-1 0 0 -1
$EndComp
$Comp
L MCP6244 U1
U 3 1 5419C208
P 5550 2150
F 0 "U1" H 5650 2350 60 0000 L CNN
F 1 "MCP6244" H 5600 1950 60 0000 L CNN
F 2 "~" H 5650 2150 60 0000 C CNN
F 3 "~" H 5650 2150 60 0000 C CNN
3 5550 2150
-1 0 0 -1
$EndComp
$Comp
L MCP6244 U1
U 4 1 5419C20E
P 2800 2250
F 0 "U1" H 2900 2450 60 0000 L CNN
F 1 "MCP6244" H 2850 2050 60 0000 L CNN
F 2 "~" H 2900 2250 60 0000 C CNN
F 3 "~" H 2900 2250 60 0000 C CNN
4 2800 2250
-1 0 0 -1
$EndComp
Text HLabel 9350 5050 2 60 Input ~ 0
V+_WallWart
Wire Wire Line
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Wire Wire Line
9350 5050 9200 5050
$Comp
L AGND #PWR02
U 1 1 5419C223
P 9200 6650
F 0 "#PWR02" H 9200 6650 40 0001 C CNN
F 1 "AGND" H 9200 6580 50 0000 C CNN
F 2 "" H 9200 6650 60 0000 C CNN
F 3 "" H 9200 6650 60 0000 C CNN
1 9200 6650
1 0 0 -1
$EndComp
$Comp
L MCP6244 U1
U 1 1 5419C693
P 9200 6150
F 0 "U1" H 9300 6350 60 0000 L CNN
F 1 "MCP6244" H 9250 5950 60 0000 L CNN
F 2 "~" H 9300 6150 60 0000 C CNN
F 3 "~" H 9300 6150 60 0000 C CNN
1 9200 6150
-1 0 0 -1
$EndComp
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AC_Shrunk
Text GLabel 7650 2300 0 60 Output ~ 0
AC_Shrunk
Wire Wire Line
6250 2050 6250 2600
Text HLabel 10800 2450 0 60 Input ~ 0
VGND
$Comp
L C C12
U 1 1 544B8DF0
P 8900 5550
F 0 "C12" H 8900 5650 40 0000 L CNN
F 1 ".1u" H 8906 5465 40 0000 L CNN
F 2 "~" H 8938 5400 30 0000 C CNN
F 3 "~" H 8900 5550 60 0000 C CNN
1 8900 5550
1 0 0 -1
$EndComp
Wire Wire Line
8900 5350 9200 5350
Connection ~ 9200 5350
Wire Wire Line
8900 5750 8900 5850
$Comp
L AGND #PWR03
U 1 1 544B8F28
P 8900 5850
F 0 "#PWR03" H 8900 5850 40 0001 C CNN
F 1 "AGND" H 8900 5780 50 0000 C CNN
F 2 "" H 8900 5850 60 0000 C CNN
F 3 "" H 8900 5850 60 0000 C CNN
1 8900 5850
1 0 0 -1
$EndComp
$Comp
L C C13
U 1 1 544B8F3A
P 9900 5450
F 0 "C13" H 9900 5550 40 0000 L CNN
F 1 ".1u" H 9906 5365 40 0000 L CNN
F 2 "~" H 9938 5300 30 0000 C CNN
F 3 "~" H 9900 5450 60 0000 C CNN
1 9900 5450
1 0 0 -1
$EndComp
Wire Wire Line
9900 5250 10150 5250
Connection ~ 10150 5250
Wire Wire Line
9900 5750 9900 5650
$Comp
L AGND #PWR04
U 1 1 544B92AF
P 9900 5750
F 0 "#PWR04" H 9900 5750 40 0001 C CNN
F 1 "AGND" H 9900 5680 50 0000 C CNN
F 2 "" H 9900 5750 60 0000 C CNN
F 3 "" H 9900 5750 60 0000 C CNN
1 9900 5750
1 0 0 -1
$EndComp
Wire Wire Line
8850 1600 8700 1600
Wire Wire Line
8700 1600 8700 1700
Wire Wire Line
8700 2100 8700 2300
Connection ~ 8700 2300
Wire Wire Line
8750 2300 8750 4200
Connection ~ 8750 2300
Wire Wire Line
10000 4200 9900 4200
Connection ~ 9900 4200
Wire Wire Line
9400 4200 9250 4200
Connection ~ 9400 4200
Wire Wire Line
8750 4200 8850 4200
$Comp
L CONN_1 TP12
U 1 1 544BE33F
P 6050 1750
F 0 "TP12" H 6130 1750 40 0000 L CNN
F 1 "CONN_1" H 6050 1805 30 0001 C CNN
F 2 "" H 6050 1750 60 0000 C CNN
F 3 "" H 6050 1750 60 0000 C CNN
1 6050 1750
0 -1 -1 0
$EndComp
$Comp
L CONN_1 TP7
U 1 1 544D057D
P 2450 1900
F 0 "TP7" H 2530 1900 40 0000 L CNN
F 1 "CONN_1" H 2450 1955 30 0001 C CNN
F 2 "" H 2450 1900 60 0000 C CNN
F 3 "" H 2450 1900 60 0000 C CNN
1 2450 1900
1 0 0 -1
$EndComp
Wire Wire Line
2300 1900 2300 2250
Connection ~ 2300 2250
Text Label 8750 3050 0 60 ~ 0
pin 7
Text Label 10000 3150 0 60 ~ 0
pin 6
Text Label 9800 2200 0 60 ~ 0
pin 5
Text Label 8700 1600 0 60 ~ 0
f1
Text Label 9300 4200 0 60 ~ 0
G1
Text Label 2250 2250 0 60 ~ 0
pin 14
Text Label 9800 6050 0 60 ~ 0
pin 3
Wire Wire Line
6000 2250 6000 3200
Wire Wire Line
6000 3200 6400 3200
Wire Wire Line
6400 3200 6400 3300
Wire Wire Line
10650 1600 10800 1600
Wire Wire Line
10800 1600 10800 2200
Wire Wire Line
10800 2200 10750 2200
Wire Wire Line
9350 1600 10250 1600
Wire Wire Line
9750 2200 10250 2200
Wire Wire Line
10050 1600 10050 2200
Connection ~ 10050 2200
Connection ~ 10050 1600
Wire Wire Line
10800 2450 10950 2450
Wire Wire Line
10950 2450 10950 1950
Wire Wire Line
10950 1950 10800 1950
Connection ~ 10800 1950
Wire Wire Line
1400 2800 1400 2950
Wire Wire Line
1650 2950 1650 2850
Wire Wire Line
7700 1150 8150 1150
Wire Wire Line
4800 2150 4800 3100
Connection ~ 4800 2150
Wire Wire Line
4800 3100 5000 3100
Text HLabel 8300 5800 0 60 Output ~ 0
AGND
Wire Wire Line
8300 5800 8900 5800
Connection ~ 8900 5800
Text HLabel 8950 6600 0 60 Output ~ 0
AGND
Wire Wire Line
8950 6600 9200 6600
Connection ~ 9200 6600
Text HLabel 9750 5700 0 60 Output ~ 0
AGND
Wire Wire Line
9750 5700 9900 5700
Connection ~ 9900 5700
Text HLabel 9950 6900 0 60 Output ~ 0
AGND
Wire Wire Line
9950 6900 10150 6900
Connection ~ 10150 6900
$Comp
L CONN_1 POT5
U 1 1 546E0503
P 9200 3300
F 0 "POT5" H 9280 3300 40 0000 L CNN
F 1 "CONN_1" H 9200 3355 30 0001 C CNN
F 2 "" H 9200 3300 60 0000 C CNN
F 3 "" H 9200 3300 60 0000 C CNN
1 9200 3300
1 0 0 -1
$EndComp
$Comp
L CONN_1 POT6
U 1 1 546E0525
P 9650 3300
F 0 "POT6" H 9730 3300 40 0000 L CNN
F 1 "CONN_1" H 9650 3355 30 0001 C CNN
F 2 "" H 9650 3300 60 0000 C CNN
F 3 "" H 9650 3300 60 0000 C CNN
1 9650 3300
-1 0 0 1
$EndComp
Wire Wire Line
9050 3300 8750 3300
Connection ~ 8750 3300
Wire Wire Line
9800 3300 10000 3300
Connection ~ 10000 3300
$Comp
L CONN_1 POT3
U 1 1 546E0664
P 7850 1350
F 0 "POT3" H 7930 1350 40 0000 L CNN
F 1 "CONN_1" H 7850 1405 30 0001 C CNN
F 2 "" H 7850 1350 60 0000 C CNN
F 3 "" H 7850 1350 60 0000 C CNN
1 7850 1350
1 0 0 -1
$EndComp
$Comp
L CONN_1 POT4
U 1 1 546E066A
P 7850 1600
F 0 "POT4" H 7930 1600 40 0000 L CNN
F 1 "CONN_1" H 7850 1655 30 0001 C CNN
F 2 "" H 7850 1600 60 0000 C CNN
F 3 "" H 7850 1600 60 0000 C CNN
1 7850 1600
1 0 0 -1
$EndComp
Wire Wire Line
7700 1350 7700 1150
Wire Wire Line
7700 1600 7700 2300
Connection ~ 7700 2300
$Comp
L CONN_1 POT1
U 1 1 546E09E2
P 5150 3100
F 0 "POT1" H 5230 3100 40 0000 L CNN
F 1 "CONN_1" H 5150 3155 30 0001 C CNN
F 2 "" H 5150 3100 60 0000 C CNN
F 3 "" H 5150 3100 60 0000 C CNN
1 5150 3100
1 0 0 -1
$EndComp
$Comp
L CONN_1 POT2
U 1 1 546E09E8
P 5650 3100
F 0 "POT2" H 5730 3100 40 0000 L CNN
F 1 "CONN_1" H 5650 3155 30 0001 C CNN
F 2 "" H 5650 3100 60 0000 C CNN
F 3 "" H 5650 3100 60 0000 C CNN
1 5650 3100
-1 0 0 1
$EndComp
Wire Wire Line
5800 3100 6000 3100
Connection ~ 6000 3100
$Comp
L CONN_1 TP1
U 1 1 546E16C0
P 4850 1800
F 0 "TP1" H 4930 1800 40 0000 L CNN
F 1 "CONN_1" H 4850 1855 30 0001 C CNN
F 2 "" H 4850 1800 60 0000 C CNN
F 3 "" H 4850 1800 60 0000 C CNN
1 4850 1800
1 0 0 -1
$EndComp
Wire Wire Line
4700 1800 4700 2150
Connection ~ 4700 2150
$EndSCHEMATC
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