EESchema Schematic File Version 2  date jue 06 jun 2013 01:22:27 CEST
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:DTMF_Shield-cache
EELAYER 24 0
EELAYER END
$Descr A4 11693 8268
encoding utf-8
Sheet 1 1
Title ""
Date "5 jun 2013"
Rev ""
Comp "by Carlosgs"
Comment1 "License: CC-BY-SA"
Comment2 ""
Comment3 ""
Comment4 ""
$EndDescr
$Comp
L LM358 U2
U 1 1 51AE13D8
P 4500 3150
F 0 "U2" H 4450 3350 60  0000 L CNN
F 1 "LM358" H 4500 3000 60  0000 L CNN
F 2 "" H 4500 3150 60  0000 C CNN
F 3 "" H 4500 3150 60  0000 C CNN
	1    4500 3150
	1    0    0    -1  
$EndComp
$Comp
L MC14LC5436P U1
U 1 1 51AE1918
P 6450 2850
F 0 "U1" H 6800 2800 60  0000 C CNN
F 1 "MC14LC5436P" V 7000 2850 60  0000 C CNN
F 2 "" H 6450 2850 60  0000 C CNN
F 3 "" H 6450 2850 60  0000 C CNN
	1    6450 2850
	0    -1   -1   0   
$EndComp
$Comp
L R R5
U 1 1 51AE198A
P 4450 3850
F 0 "R5" V 4530 3850 40  0000 C CNN
F 1 "100k" V 4457 3851 40  0000 C CNN
F 2 "~" V 4380 3850 30  0000 C CNN
F 3 "~" H 4450 3850 30  0000 C CNN
	1    4450 3850
	0    -1   -1   0   
$EndComp
$Comp
L R R3
U 1 1 51AE1999
P 3650 3250
F 0 "R3" V 3730 3250 40  0000 C CNN
F 1 "1k" V 3657 3251 40  0000 C CNN
F 2 "~" V 3580 3250 30  0000 C CNN
F 3 "~" H 3650 3250 30  0000 C CNN
	1    3650 3250
	0    -1   -1   0   
$EndComp
$Comp
L R R2
U 1 1 51AE19A8
P 3650 2450
F 0 "R2" V 3730 2450 40  0000 C CNN
F 1 "6k4" V 3657 2451 40  0000 C CNN
F 2 "~" V 3580 2450 30  0000 C CNN
F 3 "~" H 3650 2450 30  0000 C CNN
	1    3650 2450
	0    -1   -1   0   
$EndComp
$Comp
L R R4
U 1 1 51AE19B7
P 4300 2450
F 0 "R4" V 4380 2450 40  0000 C CNN
F 1 "6k4" V 4307 2451 40  0000 C CNN
F 2 "~" V 4230 2450 30  0000 C CNN
F 3 "~" H 4300 2450 30  0000 C CNN
	1    4300 2450
	0    -1   -1   0   
$EndComp
$Comp
L +5V #PWR6
U 1 1 51AE1A02
P 4650 2300
F 0 "#PWR6" H 4650 2390 20  0001 C CNN
F 1 "+5V" H 4650 2390 30  0000 C CNN
F 2 "" H 4650 2300 60  0000 C CNN
F 3 "" H 4650 2300 60  0000 C CNN
	1    4650 2300
	1    0    0    -1  
$EndComp
$Comp
L GND #PWR3
U 1 1 51AE1A11
P 3400 2600
F 0 "#PWR3" H 3400 2600 30  0001 C CNN
F 1 "GND" H 3400 2530 30  0001 C CNN
F 2 "" H 3400 2600 60  0000 C CNN
F 3 "" H 3400 2600 60  0000 C CNN
	1    3400 2600
	1    0    0    -1  
$EndComp
$Comp
L GND #PWR5
U 1 1 51AE1A20
P 4400 3650
F 0 "#PWR5" H 4400 3650 30  0001 C CNN
F 1 "GND" H 4400 3580 30  0001 C CNN
F 2 "" H 4400 3650 60  0000 C CNN
F 3 "" H 4400 3650 60  0000 C CNN
	1    4400 3650
	1    0    0    -1  
$EndComp
$Comp
L +5V #PWR4
U 1 1 51AE1A2F
P 4400 2700
F 0 "#PWR4" H 4400 2790 20  0001 C CNN
F 1 "+5V" H 4400 2790 30  0000 C CNN
F 2 "" H 4400 2700 60  0000 C CNN
F 3 "" H 4400 2700 60  0000 C CNN
	1    4400 2700
	1    0    0    -1  
$EndComp
$Comp
L +5V #PWR1
U 1 1 51AE1A3E
P 2650 2650
F 0 "#PWR1" H 2650 2740 20  0001 C CNN
F 1 "+5V" H 2650 2740 30  0000 C CNN
F 2 "" H 2650 2650 60  0000 C CNN
F 3 "" H 2650 2650 60  0000 C CNN
	1    2650 2650
	1    0    0    -1  
$EndComp
$Comp
L +5V #PWR7
U 1 1 51AE1A4D
P 5800 2700
F 0 "#PWR7" H 5800 2790 20  0001 C CNN
F 1 "+5V" H 5800 2790 30  0000 C CNN
F 2 "" H 5800 2700 60  0000 C CNN
F 3 "" H 5800 2700 60  0000 C CNN
	1    5800 2700
	1    0    0    -1  
$EndComp
$Comp
L GND #PWR10
U 1 1 51AE1A5C
P 7100 4250
F 0 "#PWR10" H 7100 4250 30  0001 C CNN
F 1 "GND" H 7100 4180 30  0001 C CNN
F 2 "" H 7100 4250 60  0000 C CNN
F 3 "" H 7100 4250 60  0000 C CNN
	1    7100 4250
	1    0    0    -1  
$EndComp
$Comp
L R R1
U 1 1 51AE1ABE
P 2650 2950
F 0 "R1" V 2730 2950 40  0000 C CNN
F 1 "2k2" V 2657 2951 40  0000 C CNN
F 2 "~" V 2580 2950 30  0000 C CNN
F 3 "~" H 2650 2950 30  0000 C CNN
	1    2650 2950
	1    0    0    -1  
$EndComp
$Comp
L CONN_2 MIC1
U 1 1 51AE1AEB
P 2200 3350
F 0 "MIC1" V 2150 3350 40  0000 C CNN
F 1 "CONN_2" V 2250 3350 40  0000 C CNN
F 2 "~" H 2200 3350 60  0000 C CNN
F 3 "~" H 2200 3350 60  0000 C CNN
	1    2200 3350
	-1   0    0    1   
$EndComp
Text Notes 2450 3550 0    60   ~ 0
-\n
$Comp
L GND #PWR2
U 1 1 51AE1B1A
P 2750 3750
F 0 "#PWR2" H 2750 3750 30  0001 C CNN
F 1 "GND" H 2750 3680 30  0001 C CNN
F 2 "" H 2750 3750 60  0000 C CNN
F 3 "" H 2750 3750 60  0000 C CNN
	1    2750 3750
	1    0    0    -1  
$EndComp
$Comp
L CP1 C1
U 1 1 51AE1B38
P 2950 3250
F 0 "C1" H 3000 3350 50  0000 L CNN
F 1 "3.3uF" H 3000 3150 50  0000 L CNN
F 2 "~" H 2950 3250 60  0000 C CNN
F 3 "~" H 2950 3250 60  0000 C CNN
	1    2950 3250
	0    -1   -1   0   
$EndComp
Text Notes 3300 2100 0    60   ~ 0
Inverting amplifier (x100)
Wire Wire Line
	2650 2700 2650 2650
Wire Wire Line
	3150 3250 3400 3250
Connection ~ 5150 3150
Wire Wire Line
	5000 3150 5400 3150
Wire Wire Line
	5150 3850 5150 3150
Connection ~ 3950 3250
Wire Wire Line
	3900 3250 4000 3250
Wire Wire Line
	4400 3550 4400 3650
Wire Wire Line
	4400 2750 4400 2700
Wire Wire Line
	3400 2450 3400 2600
Connection ~ 4000 2450
Wire Wire Line
	4000 3050 4000 2450
Wire Wire Line
	4650 2450 4650 2300
Wire Wire Line
	4550 2450 4650 2450
Wire Wire Line
	3900 2450 4050 2450
Connection ~ 2650 3250
Wire Wire Line
	2650 3200 2650 3250
Wire Wire Line
	2550 3250 2750 3250
Wire Wire Line
	2750 3450 2750 3750
Wire Wire Line
	2550 3450 2750 3450
Wire Wire Line
	3950 3250 3950 3850
Wire Wire Line
	5150 3850 4700 3850
Wire Wire Line
	3950 3850 4200 3850
Wire Notes Line
	3300 2150 3300 4350
Wire Notes Line
	5300 2150 5300 4350
Wire Notes Line
	5300 2150 3300 2150
Wire Notes Line
	3200 2500 2000 2500
Wire Notes Line
	2000 2500 2000 4350
Wire Notes Line
	3200 2500 3200 4350
Text Notes 2000 2450 0    60   ~ 0
Mic. polarization
$Comp
L CRYSTAL X1
U 1 1 51AE23C1
P 7400 3450
F 0 "X1" H 7400 3600 60  0000 C CNN
F 1 "3.58MHz" H 7400 3300 60  0000 C CNN
F 2 "~" H 7400 3450 60  0000 C CNN
F 3 "~" H 7400 3450 60  0000 C CNN
	1    7400 3450
	-1   0    0    1   
$EndComp
Wire Wire Line
	6050 3050 5800 3050
Wire Wire Line
	5800 3050 5800 2700
Wire Wire Line
	6050 2950 5800 2950
Connection ~ 5800 2950
Wire Wire Line
	6050 2850 5800 2850
Connection ~ 5800 2850
Wire Wire Line
	6050 2750 5800 2750
Connection ~ 5800 2750
$Comp
L C C3
U 1 1 51AE24E0
P 6350 3800
F 0 "C3" H 6350 3900 40  0000 L CNN
F 1 "100nF" H 6356 3715 40  0000 L CNN
F 2 "~" H 6388 3650 30  0000 C CNN
F 3 "~" H 6350 3800 60  0000 C CNN
	1    6350 3800
	1    0    0    -1  
$EndComp
$Comp
L C C2
U 1 1 51AE24EF
P 5600 3150
F 0 "C2" H 5600 3250 40  0000 L CNN
F 1 "10nF" H 5606 3065 40  0000 L CNN
F 2 "~" H 5638 3000 30  0000 C CNN
F 3 "~" H 5600 3150 60  0000 C CNN
	1    5600 3150
	0    -1   -1   0   
$EndComp
$Comp
L R R6
U 1 1 51AE24FE
P 7350 3150
F 0 "R6" V 7430 3150 40  0000 C CNN
F 1 "1M" V 7357 3151 40  0000 C CNN
F 2 "~" V 7280 3150 30  0000 C CNN
F 3 "~" H 7350 3150 30  0000 C CNN
	1    7350 3150
	0    -1   -1   0   
$EndComp
$Comp
L C C5
U 1 1 51AE251C
P 7700 3800
F 0 "C5" H 7700 3900 40  0000 L CNN
F 1 "15pF" H 7706 3715 40  0000 L CNN
F 2 "~" H 7738 3650 30  0000 C CNN
F 3 "~" H 7700 3800 60  0000 C CNN
	1    7700 3800
	1    0    0    -1  
$EndComp
$Comp
L C C4
U 1 1 51AE252B
P 7100 3800
F 0 "C4" H 7100 3900 40  0000 L CNN
F 1 "15pF" H 7106 3715 40  0000 L CNN
F 2 "~" H 7138 3650 30  0000 C CNN
F 3 "~" H 7100 3800 60  0000 C CNN
	1    7100 3800
	1    0    0    -1  
$EndComp
Wire Wire Line
	6850 3150 6850 4100
Wire Wire Line
	6850 4100 7700 4100
Wire Wire Line
	7100 4000 7100 4250
Connection ~ 7100 4100
Wire Wire Line
	7700 4100 7700 4000
Wire Wire Line
	7100 3050 7100 3600
Wire Wire Line
	7700 2950 7700 3600
Wire Wire Line
	7600 3150 7700 3150
Connection ~ 7700 3450
Connection ~ 7100 3450
Wire Wire Line
	7100 3050 6850 3050
Connection ~ 7100 3150
Wire Wire Line
	6850 2950 7700 2950
Connection ~ 7700 3150
Wire Wire Line
	5800 3150 6050 3150
$Comp
L +5V #PWR8
U 1 1 51AE29F2
P 6350 3550
F 0 "#PWR8" H 6350 3640 20  0001 C CNN
F 1 "+5V" H 6350 3640 30  0000 C CNN
F 2 "" H 6350 3550 60  0000 C CNN
F 3 "" H 6350 3550 60  0000 C CNN
	1    6350 3550
	1    0    0    -1  
$EndComp
$Comp
L GND #PWR9
U 1 1 51AE2A01
P 6350 4100
F 0 "#PWR9" H 6350 4100 30  0001 C CNN
F 1 "GND" H 6350 4030 30  0001 C CNN
F 2 "" H 6350 4100 60  0000 C CNN
F 3 "" H 6350 4100 60  0000 C CNN
	1    6350 4100
	1    0    0    -1  
$EndComp
Wire Wire Line
	6350 4100 6350 4000
Wire Wire Line
	6350 3600 6350 3550
Wire Notes Line
	5400 1900 5400 4350
Wire Notes Line
	5400 4350 7950 4350
Text Notes 5400 1850 0    60   ~ 0
DTMF detector
Wire Wire Line
	6850 2750 8550 2750
Wire Wire Line
	6850 2650 8550 2650
Wire Wire Line
	6850 2550 8550 2550
Wire Wire Line
	7000 2450 8550 2450
Wire Wire Line
	7000 2450 7000 2100
Wire Wire Line
	7000 2100 6050 2100
Wire Wire Line
	6050 2100 6050 2550
Wire Wire Line
	7100 2350 8550 2350
Wire Wire Line
	7100 2350 7100 2000
Wire Wire Line
	7100 2000 5950 2000
Wire Wire Line
	5950 2000 5950 2650
Wire Wire Line
	5950 2650 6050 2650
Wire Notes Line
	5400 1900 7950 1900
Wire Notes Line
	7950 1900 7950 4350
Wire Notes Line
	5300 4350 3300 4350
Wire Notes Line
	3200 4350 2000 4350
Text Notes 8100 2450 0    60   ~ 0
D2
Text Notes 8100 2350 0    60   ~ 0
D1
Text Notes 8100 2550 0    60   ~ 0
D4
Text Notes 8100 2650 0    60   ~ 0
D8
Text Notes 8100 2750 0    60   ~ 0
DV
$Comp
L CONN_2 P2
U 1 1 51AE2E6D
P 8650 3600
F 0 "P2" V 8600 3600 40  0000 C CNN
F 1 "POWER" V 8700 3600 40  0000 C CNN
F 2 "~" H 8650 3600 60  0000 C CNN
F 3 "~" H 8650 3600 60  0000 C CNN
	1    8650 3600
	1    0    0    -1  
$EndComp
$Comp
L CONN_5 P1
U 1 1 51AE2E7C
P 8950 2550
F 0 "P1" V 8900 2550 50  0000 C CNN
F 1 "Decod" V 9000 2550 50  0000 C CNN
F 2 "~" H 8950 2550 60  0000 C CNN
F 3 "~" H 8950 2550 60  0000 C CNN
	1    8950 2550
	1    0    0    -1  
$EndComp
$Comp
L +5V #PWR11
U 1 1 51AE2FF8
P 8300 3400
F 0 "#PWR11" H 8300 3490 20  0001 C CNN
F 1 "+5V" H 8300 3490 30  0000 C CNN
F 2 "" H 8300 3400 60  0000 C CNN
F 3 "" H 8300 3400 60  0000 C CNN
	1    8300 3400
	1    0    0    -1  
$EndComp
$Comp
L GND #PWR12
U 1 1 51AE3007
P 8300 3850
F 0 "#PWR12" H 8300 3850 30  0001 C CNN
F 1 "GND" H 8300 3780 30  0001 C CNN
F 2 "" H 8300 3850 60  0000 C CNN
F 3 "" H 8300 3850 60  0000 C CNN
	1    8300 3850
	1    0    0    -1  
$EndComp
Wire Wire Line
	8300 3400 8300 3500
Wire Wire Line
	8300 3700 8300 3850
$EndSCHEMATC