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:lf1600-cache
EELAYER 27 0
EELAYER END
$Descr A4 11693 8268
encoding utf-8
Sheet 5 5
Title "Xytronic LF-1600 - Temperature sensor"
Date "6 sep 2015"
Rev "1.0"
Comp "Reverse engineered by Michael Büsch <m@bues.ch>"
Comment1 ""
Comment2 ""
Comment3 ""
Comment4 ""
$EndDescr
$Comp
L CONN_3 J3
U 1 1 549557D4
P 2150 1450
F 0 "J3" V 2100 1450 50  0000 C CNN
F 1 "SENS" V 2200 1450 40  0000 C CNN
F 2 "" H 2150 1450 60  0000 C CNN
F 3 "" H 2150 1450 60  0000 C CNN
	1    2150 1450
	-1   0    0    1   
$EndComp
$Comp
L LM6161 U2
U 1 1 54956736
P 6300 4500
F 0 "U2" H 6450 4800 60  0000 C CNN
F 1 "OP07DP" H 6450 4700 60  0000 C CNN
F 2 "" H 6300 4500 60  0000 C CNN
F 3 "" H 6300 4500 60  0000 C CNN
	1    6300 4500
	-1   0    0    1   
$EndComp
NoConn ~ 6200 4100
NoConn ~ 6300 4100
Text GLabel 6400 5050 3    60   Input ~ 0
+5V
Text GLabel 6400 3950 1    60   Input ~ 0
-5V
Wire Wire Line
	6400 3950 6400 4100
Wire Wire Line
	6400 5050 6400 4900
Text GLabel 6050 3000 3    60   Input ~ 0
+5V
NoConn ~ 6050 2250
Wire Wire Line
	6050 3000 6050 2750
$Comp
L POT VR2
U 1 1 54956921
P 6050 2500
F 0 "VR2" H 6050 2400 50  0000 C CNN
F 1 "10 k" H 6050 2500 50  0000 C CNN
F 2 "~" H 6050 2500 60  0000 C CNN
F 3 "~" H 6050 2500 60  0000 C CNN
	1    6050 2500
	0    -1   -1   0   
$EndComp
$Comp
L POT VR1
U 1 1 54956927
P 5250 5600
F 0 "VR1" H 5250 5500 50  0000 C CNN
F 1 "10 k" H 5250 5600 50  0000 C CNN
F 2 "~" H 5250 5600 60  0000 C CNN
F 3 "~" H 5250 5600 60  0000 C CNN
	1    5250 5600
	0    1    1    0   
$EndComp
NoConn ~ 5250 5850
$Comp
L R R12
U 1 1 54958872
P 3850 4500
F 0 "R12" V 3930 4500 40  0000 C CNN
F 1 "10 k" V 3857 4501 40  0000 C CNN
F 2 "~" V 3780 4500 30  0000 C CNN
F 3 "~" H 3850 4500 30  0000 C CNN
	1    3850 4500
	0    1    1    0   
$EndComp
Text HLabel 2350 4500 0    60   Input ~ 0
temp_measure
Wire Wire Line
	3600 4500 2350 4500
Text HLabel 2350 2450 0    60   Input ~ 0
iron_switch
$Comp
L R R18
U 1 1 549616C5
P 2700 2000
F 0 "R18" V 2780 2000 40  0000 C CNN
F 1 "1 k" V 2707 2001 40  0000 C CNN
F 2 "~" V 2630 2000 30  0000 C CNN
F 3 "~" H 2700 2000 30  0000 C CNN
	1    2700 2000
	1    0    0    -1  
$EndComp
Wire Wire Line
	2500 1550 2700 1550
Wire Wire Line
	2700 1550 2700 1750
Wire Wire Line
	2700 2450 2700 2250
Wire Wire Line
	2350 2450 2700 2450
Text GLabel 3050 1450 2    60   Input ~ 0
GND
Wire Wire Line
	2500 1450 3050 1450
Text Label 2550 1550 0    39   ~ 0
SW
Text Label 2550 1450 0    39   ~ 0
-
Text Label 2550 1350 0    39   ~ 0
+
$Comp
L INDUCTOR L5
U 1 1 549634F8
P 4150 1350
F 0 "L5" V 4100 1350 40  0000 C CNN
F 1 "1500 µH / 10 %" V 4250 1350 40  0000 C CNN
F 2 "~" H 4150 1350 60  0000 C CNN
F 3 "~" H 4150 1350 60  0000 C CNN
	1    4150 1350
	0    1    1    0   
$EndComp
$Comp
L C C4
U 1 1 5496366E
P 3700 1700
F 0 "C4" H 3700 1800 40  0000 L CNN
F 1 "22 µF / 63 V" H 3706 1615 40  0000 L CNN
F 2 "~" H 3738 1550 30  0000 C CNN
F 3 "~" H 3700 1700 60  0000 C CNN
	1    3700 1700
	1    0    0    -1  
$EndComp
Text GLabel 3700 2050 3    60   Input ~ 0
GND
Wire Wire Line
	2500 1350 3850 1350
Wire Wire Line
	3700 1350 3700 1500
Connection ~ 3700 1350
Wire Wire Line
	3700 1900 3700 2050
$Comp
L C C3
U 1 1 54963922
P 4600 1700
F 0 "C3" H 4600 1800 40  0000 L CNN
F 1 "22 µF / 63 V" H 4606 1615 40  0000 L CNN
F 2 "~" H 4638 1550 30  0000 C CNN
F 3 "~" H 4600 1700 60  0000 C CNN
	1    4600 1700
	1    0    0    -1  
$EndComp
Text GLabel 4600 2050 3    60   Input ~ 0
GND
Wire Wire Line
	4600 1900 4600 2050
Wire Wire Line
	4450 1350 6250 1350
Wire Wire Line
	4600 1350 4600 1500
Connection ~ 4600 1350
$Comp
L R R17
U 1 1 54963BC9
P 5350 1700
F 0 "R17" V 5430 1700 40  0000 C CNN
F 1 "R" V 5357 1701 40  0000 C CNN
F 2 "~" V 5280 1700 30  0000 C CNN
F 3 "~" H 5350 1700 30  0000 C CNN
	1    5350 1700
	1    0    0    -1  
$EndComp
Text GLabel 5350 2050 3    60   Input ~ 0
+5V
Wire Wire Line
	5350 1350 5350 1450
Connection ~ 5350 1350
Wire Wire Line
	5350 1950 5350 2050
$Comp
L R R19
U 1 1 54963EA1
P 5800 1700
F 0 "R19" V 5880 1700 40  0000 C CNN
F 1 "43 k" V 5807 1701 40  0000 C CNN
F 2 "~" V 5730 1700 30  0000 C CNN
F 3 "~" H 5800 1700 30  0000 C CNN
	1    5800 1700
	1    0    0    -1  
$EndComp
Wire Wire Line
	5800 1350 5800 1450
Connection ~ 5800 1350
Wire Wire Line
	5800 1950 5800 2500
Wire Wire Line
	5800 2500 5900 2500
$Comp
L R R16
U 1 1 5496404D
P 6500 1350
F 0 "R16" V 6580 1350 40  0000 C CNN
F 1 "10 k" V 6507 1351 40  0000 C CNN
F 2 "~" V 6430 1350 30  0000 C CNN
F 3 "~" H 6500 1350 30  0000 C CNN
	1    6500 1350
	0    -1   -1   0   
$EndComp
$Comp
L R L3
U 1 1 5496432E
P 8350 4850
F 0 "L3" V 8430 4850 40  0000 C CNN
F 1 "0" V 8357 4851 40  0000 C CNN
F 2 "~" V 8280 4850 30  0000 C CNN
F 3 "~" H 8350 4850 30  0000 C CNN
	1    8350 4850
	0    -1   -1   0   
$EndComp
$Comp
L C C17
U 1 1 54964481
P 7350 1350
F 0 "C17" H 7350 1450 40  0000 L CNN
F 1 "47 µF / 16 V" H 7356 1265 40  0000 L CNN
F 2 "~" H 7388 1200 30  0000 C CNN
F 3 "~" H 7350 1350 60  0000 C CNN
	1    7350 1350
	0    -1   -1   0   
$EndComp
Wire Wire Line
	6750 1350 7150 1350
Text GLabel 7750 1350 2    60   Input ~ 0
GND
Wire Wire Line
	7550 1350 7750 1350
Wire Wire Line
	6950 1350 6950 2850
Connection ~ 6950 1350
$Comp
L C C15
U 1 1 5496476E
P 7950 4500
F 0 "C15" H 7950 4600 40  0000 L CNN
F 1 "330 pF" H 7956 4415 40  0000 L CNN
F 2 "~" H 7988 4350 30  0000 C CNN
F 3 "~" H 7950 4500 60  0000 C CNN
	1    7950 4500
	1    0    0    -1  
$EndComp
$Comp
L R L1
U 1 1 5496477B
P 7550 4850
F 0 "L1" V 7630 4850 40  0000 C CNN
F 1 "0" V 7557 4851 40  0000 C CNN
F 2 "~" V 7480 4850 30  0000 C CNN
F 3 "~" H 7550 4850 30  0000 C CNN
	1    7550 4850
	0    -1   -1   0   
$EndComp
$Comp
L C C16
U 1 1 54964A38
P 7150 4500
F 0 "C16" H 7150 4600 40  0000 L CNN
F 1 "330 pF" H 7156 4415 40  0000 L CNN
F 2 "~" H 7188 4350 30  0000 C CNN
F 3 "~" H 7150 4500 60  0000 C CNN
	1    7150 4500
	1    0    0    -1  
$EndComp
$Comp
L R L2
U 1 1 54964A81
P 7550 4150
F 0 "L2" V 7630 4150 40  0000 C CNN
F 1 "0" V 7557 4151 40  0000 C CNN
F 2 "~" V 7480 4150 30  0000 C CNN
F 3 "~" H 7550 4150 30  0000 C CNN
	1    7550 4150
	0    -1   -1   0   
$EndComp
Wire Wire Line
	6950 4600 6800 4600
$Comp
L R L4
U 1 1 54965035
P 8350 4150
F 0 "L4" V 8430 4150 40  0000 C CNN
F 1 "0" V 8357 4151 40  0000 C CNN
F 2 "~" V 8280 4150 30  0000 C CNN
F 3 "~" H 8350 4150 30  0000 C CNN
	1    8350 4150
	0    -1   -1   0   
$EndComp
$Comp
L DIODE D5
U 1 1 54965466
P 9100 3750
F 0 "D5" H 9100 3850 40  0000 C CNN
F 1 "DIODE" H 9100 3650 40  0000 C CNN
F 2 "~" H 9100 3750 60  0000 C CNN
F 3 "~" H 9100 3750 60  0000 C CNN
	1    9100 3750
	1    0    0    -1  
$EndComp
$Comp
L DIODE D6
U 1 1 54965473
P 9100 4150
F 0 "D6" H 9100 4250 40  0000 C CNN
F 1 "DIODE" H 9100 4050 40  0000 C CNN
F 2 "~" H 9100 4150 60  0000 C CNN
F 3 "~" H 9100 4150 60  0000 C CNN
	1    9100 4150
	-1   0    0    1   
$EndComp
Wire Wire Line
	9300 3750 9400 3750
Wire Wire Line
	9400 3750 9400 4150
Wire Wire Line
	9400 4150 9300 4150
Wire Wire Line
	8900 3750 8750 3750
Wire Wire Line
	8600 4150 8900 4150
Connection ~ 8750 4150
Text Notes 9450 4000 0    60   ~ 0
WTF!?
$Comp
L R R15
U 1 1 54965A0B
P 8750 6000
F 0 "R15" V 8830 6000 40  0000 C CNN
F 1 "470" V 8757 6001 40  0000 C CNN
F 2 "~" V 8680 6000 30  0000 C CNN
F 3 "~" H 8750 6000 30  0000 C CNN
	1    8750 6000
	1    0    0    -1  
$EndComp
Text GLabel 8750 6400 3    60   Input ~ 0
GND
Wire Wire Line
	8750 6250 8750 6400
$Comp
L R R14
U 1 1 54965E3E
P 5250 4950
F 0 "R14" V 5330 4950 40  0000 C CNN
F 1 "10 k" V 5257 4951 40  0000 C CNN
F 2 "~" V 5180 4950 30  0000 C CNN
F 3 "~" H 5250 4950 30  0000 C CNN
	1    5250 4950
	1    0    0    -1  
$EndComp
Wire Wire Line
	5250 4700 5250 4500
Wire Wire Line
	5000 4500 5800 4500
Connection ~ 5250 4500
Wire Wire Line
	5250 5350 5250 5200
$Comp
L R R13
U 1 1 549665E7
P 4750 4500
F 0 "R13" V 4830 4500 40  0000 C CNN
F 1 "10 k" V 4757 4501 40  0000 C CNN
F 2 "~" V 4680 4500 30  0000 C CNN
F 3 "~" H 4750 4500 30  0000 C CNN
	1    4750 4500
	0    -1   -1   0   
$EndComp
$Comp
L C C?
U 1 1 54966746
P 4300 4100
F 0 "C?" H 4300 4200 40  0000 L CNN
F 1 "47 µF / 16 V" H 4306 4015 40  0000 L CNN
F 2 "~" H 4338 3950 30  0000 C CNN
F 3 "~" H 4300 4100 60  0000 C CNN
	1    4300 4100
	1    0    0    -1  
$EndComp
Text GLabel 4300 3700 1    60   Input ~ 0
GND
Wire Wire Line
	4300 3700 4300 3900
Wire Wire Line
	4100 4500 4500 4500
Wire Wire Line
	4300 4300 4300 4500
Connection ~ 4300 4500
Wire Wire Line
	6800 4400 6950 4400
Wire Wire Line
	6950 4400 6950 4150
Wire Wire Line
	6950 4150 7300 4150
Wire Wire Line
	7150 4150 7150 4300
Connection ~ 7150 4150
Wire Wire Line
	6950 4600 6950 4850
Wire Wire Line
	6950 4850 7300 4850
Wire Wire Line
	7150 4700 7150 4850
Connection ~ 7150 4850
Wire Wire Line
	7950 4150 7950 4300
Wire Wire Line
	7950 4850 7950 4700
Connection ~ 7950 4150
Connection ~ 7950 4850
Wire Wire Line
	8600 4850 10050 4850
Wire Wire Line
	7800 4150 8100 4150
Wire Wire Line
	7800 4850 8100 4850
Wire Wire Line
	8750 3750 8750 5750
Wire Wire Line
	10050 4850 10050 2850
Wire Wire Line
	10050 2850 6950 2850
Wire Wire Line
	8750 5600 5400 5600
Connection ~ 8750 5600
Text Notes 750  1450 0    60   ~ 0
Sens R 53 Ohms @ 20 °C
Text Notes 2400 4750 0    60   ~ 0
Fix:\nThe input to the ADC needs to be of low impedance\nto help charging the ADC capacitor quickly.\nSo R12 was removed (bridged).
Wire Wire Line
	3550 4500 3550 4700
Wire Wire Line
	4150 4500 4150 4700
Connection ~ 4150 4500
Connection ~ 3550 4500
Wire Wire Line
	4150 4700 3550 4700
$EndSCHEMATC