EESchema Schematic File Version 4
EELAYER 30 0
EELAYER END
$Descr A3 16535 11693
encoding utf-8
Sheet 1 1
Title ""
Date ""
Rev ""
Comp ""
Comment1 ""
Comment2 ""
Comment3 ""
Comment4 ""
$EndDescr
Text Notes 12250 10950 0    79   ~ 0
Pat80 Z80 home computer
Text Notes 13000 11050 0    50   ~ 0
2021-03-15
$Comp
L Memory_EEPROM:28C256 U3
U 1 1 604F6B81
P 7850 2500
F 0 "U3" V 7896 1356 50  0000 R CNN
F 1 "256k (32k x 8) EEPROM" V 7805 1356 50  0000 R CNN
F 2 "" H 7850 2500 50  0001 C CNN
F 3 "http://ww1.microchip.com/downloads/en/DeviceDoc/doc0006.pdf" H 7850 2500 50  0001 C CNN
	1    7850 2500
	0    -1   -1   0   
$EndComp
Entry Wire Line
	5150 2350 5250 2450
Entry Wire Line
	5150 2450 5250 2550
Entry Wire Line
	5150 2550 5250 2650
Entry Wire Line
	5150 2650 5250 2750
Entry Wire Line
	5150 2750 5250 2850
Entry Wire Line
	5150 2850 5250 2950
Entry Wire Line
	5150 2950 5250 3050
Entry Wire Line
	5150 3050 5250 3150
Entry Wire Line
	5150 3150 5250 3250
Entry Wire Line
	5150 3250 5250 3350
Entry Wire Line
	5150 3350 5250 3450
Entry Wire Line
	5150 3450 5250 3550
Entry Wire Line
	5150 3550 5250 3650
Entry Wire Line
	5150 3650 5250 3750
Entry Wire Line
	5150 3750 5250 3850
Wire Bus Line
	5250 3850 6100 3850
Wire Wire Line
	4850 2250 5150 2250
Wire Wire Line
	4850 2350 5150 2350
Wire Wire Line
	4850 2450 5150 2450
Wire Wire Line
	4850 2550 5150 2550
Wire Wire Line
	4850 2650 5150 2650
Wire Wire Line
	4850 2750 5150 2750
Wire Wire Line
	4850 2850 5150 2850
Wire Wire Line
	4850 2950 5150 2950
Wire Wire Line
	4850 3050 5150 3050
Wire Wire Line
	4850 3150 5150 3150
Wire Wire Line
	4850 3250 5150 3250
Wire Wire Line
	4850 3350 5150 3350
Wire Wire Line
	4850 3450 5150 3450
Wire Wire Line
	4850 3550 5150 3550
Wire Wire Line
	4850 3650 5150 3650
Wire Wire Line
	4850 3750 5150 3750
Entry Wire Line
	6950 3000 6850 3100
Entry Wire Line
	7050 3000 6950 3100
Entry Wire Line
	7150 3000 7050 3100
Entry Wire Line
	7250 3000 7150 3100
Entry Wire Line
	7350 3000 7250 3100
Entry Wire Line
	7450 3000 7350 3100
Entry Wire Line
	7550 3000 7450 3100
Entry Wire Line
	7650 3000 7550 3100
Entry Wire Line
	7750 3000 7650 3100
Entry Wire Line
	7850 3000 7750 3100
Entry Wire Line
	7950 3000 7850 3100
Entry Wire Line
	8050 3000 7950 3100
Entry Wire Line
	8150 3000 8050 3100
Entry Wire Line
	8250 3000 8150 3100
Entry Wire Line
	8350 3000 8250 3100
Wire Wire Line
	6950 2900 6950 3000
Wire Wire Line
	7050 2900 7050 3000
Wire Wire Line
	7150 2900 7150 3000
Wire Wire Line
	7250 2900 7250 3000
Wire Wire Line
	7350 2900 7350 3000
Wire Wire Line
	7450 2900 7450 3000
Wire Wire Line
	7550 2900 7550 3000
Wire Wire Line
	7650 2900 7650 3000
Wire Wire Line
	7750 2900 7750 3000
Wire Wire Line
	7850 2900 7850 3000
Wire Wire Line
	7950 2900 7950 3000
Wire Wire Line
	8050 2900 8050 3000
Wire Wire Line
	8150 2900 8150 3000
Wire Wire Line
	8250 2900 8250 3000
Wire Wire Line
	8350 2900 8350 3000
Wire Bus Line
	6100 3850 6100 3100
Text Label 4950 2250 0    50   ~ 0
A0
Text Label 4950 2350 0    50   ~ 0
A1
Text Label 4950 2450 0    50   ~ 0
A2
Text Label 4950 2550 0    50   ~ 0
A3
Text Label 4950 2650 0    50   ~ 0
A4
Text Label 4950 2750 0    50   ~ 0
A5
Text Label 4950 2850 0    50   ~ 0
A6
Text Label 4950 2950 0    50   ~ 0
A7
Text Label 4950 3050 0    50   ~ 0
A8
Text Label 4950 3150 0    50   ~ 0
A9
Text Label 4950 3250 0    50   ~ 0
A10
Text Label 4950 3350 0    50   ~ 0
A11
Text Label 4950 3450 0    50   ~ 0
A12
Text Label 4950 3550 0    50   ~ 0
A13
Text Label 4950 3650 0    50   ~ 0
A14
Text Label 4950 3750 0    50   ~ 0
A15
Text Label 6950 2950 3    50   ~ 0
A0
Text Label 7050 2950 3    50   ~ 0
A1
Text Label 7150 2950 3    50   ~ 0
A2
Text Label 7250 2950 3    50   ~ 0
A3
Text Label 7350 2950 3    50   ~ 0
A4
Text Label 7450 2950 3    50   ~ 0
A5
Text Label 7550 2950 3    50   ~ 0
A6
Text Label 7650 2950 3    50   ~ 0
A7
Text Label 7750 2950 3    50   ~ 0
A8
Text Label 7850 2950 3    50   ~ 0
A9
Text Label 7950 2950 3    50   ~ 0
A10
Text Label 8050 2950 3    50   ~ 0
A11
Text Label 8150 2950 3    50   ~ 0
A12
Text Label 8250 2950 3    50   ~ 0
A13
Text Label 8350 2950 3    50   ~ 0
A14
Entry Wire Line
	6950 4550 6850 4650
Entry Wire Line
	7050 4550 6950 4650
Entry Wire Line
	7150 4550 7050 4650
Entry Wire Line
	7250 4550 7150 4650
Entry Wire Line
	7350 4550 7250 4650
Entry Wire Line
	7450 4550 7350 4650
Entry Wire Line
	7550 4550 7450 4650
Entry Wire Line
	7650 4550 7550 4650
Entry Wire Line
	7750 4550 7650 4650
Entry Wire Line
	7850 4550 7750 4650
Entry Wire Line
	7950 4550 7850 4650
Entry Wire Line
	8050 4550 7950 4650
Entry Wire Line
	8150 4550 8050 4650
Entry Wire Line
	8250 4550 8150 4650
Entry Wire Line
	8350 4550 8250 4650
Wire Wire Line
	6950 4550 6950 4450
Wire Wire Line
	7050 4550 7050 4450
Wire Wire Line
	7150 4550 7150 4450
Wire Wire Line
	7250 4550 7250 4450
Wire Wire Line
	7350 4550 7350 4450
Wire Wire Line
	7450 4550 7450 4450
Wire Wire Line
	7550 4550 7550 4450
Wire Wire Line
	7650 4550 7650 4450
Wire Wire Line
	7750 4550 7750 4450
Wire Wire Line
	7850 4550 7850 4450
Wire Wire Line
	7950 4550 7950 4450
Wire Wire Line
	8050 4550 8050 4450
Wire Wire Line
	8150 4550 8150 4450
Wire Wire Line
	8250 4550 8250 4450
Wire Wire Line
	8350 4550 8350 4450
Connection ~ 6100 3850
Text Label 6950 4500 3    50   ~ 0
A0
Text Label 7050 4500 3    50   ~ 0
A1
Text Label 7150 4500 3    50   ~ 0
A2
Text Label 7250 4500 3    50   ~ 0
A3
Text Label 7350 4500 3    50   ~ 0
A4
Text Label 7450 4500 3    50   ~ 0
A5
Text Label 7550 4500 3    50   ~ 0
A6
Text Label 7650 4500 3    50   ~ 0
A7
Text Label 7750 4500 3    50   ~ 0
A8
Text Label 7850 4500 3    50   ~ 0
A9
Text Label 7950 4500 3    50   ~ 0
A10
Text Label 8050 4500 3    50   ~ 0
A11
Text Label 8150 4500 3    50   ~ 0
A12
Text Label 8250 4500 3    50   ~ 0
A13
Text Label 8350 4500 3    50   ~ 0
A14
Entry Wire Line
	5150 3950 5250 4050
Entry Wire Line
	5150 3950 5250 4050
Entry Wire Line
	5150 4050 5250 4150
Entry Wire Line
	5150 4150 5250 4250
Entry Wire Line
	5150 4250 5250 4350
Entry Wire Line
	5150 4350 5250 4450
Entry Wire Line
	5150 4450 5250 4550
Entry Wire Line
	5150 4550 5250 4650
Entry Wire Line
	5150 4650 5250 4750
Wire Wire Line
	4850 3950 5150 3950
Wire Wire Line
	4850 4050 5150 4050
Wire Wire Line
	4850 4150 5150 4150
Wire Wire Line
	4850 4250 5150 4250
Wire Wire Line
	4850 4350 5150 4350
Wire Wire Line
	4850 4450 5150 4450
Wire Wire Line
	4850 4550 5150 4550
Wire Wire Line
	4850 4650 5150 4650
Wire Bus Line
	5250 5150 9600 5150
Entry Wire Line
	6950 3550 7050 3450
Entry Wire Line
	7150 3450 7050 3550
Entry Wire Line
	7250 3450 7150 3550
Entry Wire Line
	7350 3450 7250 3550
Entry Wire Line
	7450 3450 7350 3550
Entry Wire Line
	7550 3450 7450 3550
Entry Wire Line
	7650 3450 7550 3550
Entry Wire Line
	7750 3450 7650 3550
Wire Wire Line
	6950 3650 6950 3550
Wire Wire Line
	7050 3650 7050 3550
Wire Wire Line
	7150 3650 7150 3550
Wire Wire Line
	7250 3650 7250 3550
Wire Wire Line
	7350 3650 7350 3550
Wire Wire Line
	7450 3650 7450 3550
Wire Wire Line
	7550 3650 7550 3550
Wire Wire Line
	7650 3650 7650 3550
Wire Bus Line
	9600 3450 9600 5150
Entry Wire Line
	7050 1900 6950 2000
Entry Wire Line
	7150 1900 7050 2000
Entry Wire Line
	7250 1900 7150 2000
Entry Wire Line
	7350 1900 7250 2000
Entry Wire Line
	7450 1900 7350 2000
Entry Wire Line
	7550 1900 7450 2000
Entry Wire Line
	7650 1900 7550 2000
Entry Wire Line
	7750 1900 7650 2000
Wire Wire Line
	6950 2100 6950 2000
Wire Wire Line
	7050 2100 7050 2000
Wire Wire Line
	7150 2100 7150 2000
Wire Wire Line
	7250 2100 7250 2000
Wire Wire Line
	7350 2100 7350 2000
Wire Wire Line
	7450 2100 7450 2000
Wire Wire Line
	7550 2100 7550 2000
Wire Wire Line
	7650 2100 7650 2000
Wire Bus Line
	9600 1900 9600 3450
Connection ~ 9600 3450
Text Label 6950 2000 3    50   ~ 0
D0
Text Label 7050 2000 3    50   ~ 0
D1
Text Label 7150 2000 3    50   ~ 0
D2
Text Label 7250 2000 3    50   ~ 0
D3
Text Label 7350 2000 3    50   ~ 0
D4
Text Label 7450 2000 3    50   ~ 0
D5
Text Label 7550 2000 3    50   ~ 0
D6
Text Label 7650 2000 3    50   ~ 0
D7
Text Label 6950 3550 3    50   ~ 0
D0
Text Label 7050 3550 3    50   ~ 0
D1
Text Label 7150 3550 3    50   ~ 0
D2
Text Label 7250 3550 3    50   ~ 0
D3
Text Label 7350 3550 3    50   ~ 0
D4
Text Label 7450 3550 3    50   ~ 0
D5
Text Label 7550 3550 3    50   ~ 0
D6
Text Label 7650 3550 3    50   ~ 0
D7
Text Label 4950 3950 0    50   ~ 0
D0
Text Label 4950 4050 0    50   ~ 0
D1
Text Label 4950 4150 0    50   ~ 0
D2
Text Label 4950 4250 0    50   ~ 0
D3
Text Label 4950 4350 0    50   ~ 0
D4
Text Label 4950 4450 0    50   ~ 0
D5
Text Label 4950 4550 0    50   ~ 0
D6
Text Label 4950 4650 0    50   ~ 0
D7
Entry Wire Line
	5150 2250 5250 2350
$Comp
L Memory_EEPROM:28C256 U4
U 1 1 604FD5C5
P 7850 4050
F 0 "U4" V 7896 2906 50  0000 R CNN
F 1 "256k (32k x 8) SRAM" V 7805 2906 50  0000 R CNN
F 2 "" H 7850 4050 50  0001 C CNN
F 3 "http://ww1.microchip.com/downloads/en/DeviceDoc/doc0006.pdf" H 7850 4050 50  0001 C CNN
	1    7850 4050
	0    -1   -1   0   
$EndComp
Wire Bus Line
	6100 4650 6100 3850
$Comp
L power:GND #PWR?
U 1 1 60507104
P 8950 2500
F 0 "#PWR?" H 8950 2250 50  0001 C CNN
F 1 "GND" H 8955 2327 50  0000 C CNN
F 2 "" H 8950 2500 50  0001 C CNN
F 3 "" H 8950 2500 50  0001 C CNN
	1    8950 2500
	1    0    0    -1  
$EndComp
$Comp
L power:GND #PWR?
U 1 1 6050737A
P 8950 4050
F 0 "#PWR?" H 8950 3800 50  0001 C CNN
F 1 "GND" H 8955 3877 50  0000 C CNN
F 2 "" H 8950 4050 50  0001 C CNN
F 3 "" H 8950 4050 50  0001 C CNN
	1    8950 4050
	1    0    0    -1  
$EndComp
$Comp
L power:GND #PWR?
U 1 1 605076F8
P 4150 4950
F 0 "#PWR?" H 4150 4700 50  0001 C CNN
F 1 "GND" H 4155 4777 50  0000 C CNN
F 2 "" H 4150 4950 50  0001 C CNN
F 3 "" H 4150 4950 50  0001 C CNN
	1    4150 4950
	1    0    0    -1  
$EndComp
$Comp
L power:VCC #PWR?
U 1 1 60507B8E
P 4150 1450
F 0 "#PWR?" H 4150 1300 50  0001 C CNN
F 1 "VCC" H 4167 1623 50  0000 C CNN
F 2 "" H 4150 1450 50  0001 C CNN
F 3 "" H 4150 1450 50  0001 C CNN
	1    4150 1450
	1    0    0    -1  
$EndComp
$Comp
L power:VCC #PWR?
U 1 1 60507E3C
P 6750 2500
F 0 "#PWR?" H 6750 2350 50  0001 C CNN
F 1 "VCC" H 6767 2673 50  0000 C CNN
F 2 "" H 6750 2500 50  0001 C CNN
F 3 "" H 6750 2500 50  0001 C CNN
	1    6750 2500
	1    0    0    -1  
$EndComp
$Comp
L power:VCC #PWR?
U 1 1 605080EF
P 6750 4050
F 0 "#PWR?" H 6750 3900 50  0001 C CNN
F 1 "VCC" H 6767 4223 50  0000 C CNN
F 2 "" H 6750 4050 50  0001 C CNN
F 3 "" H 6750 4050 50  0001 C CNN
	1    6750 4050
	1    0    0    -1  
$EndComp
$Comp
L power:VCC #PWR?
U 1 1 60508CD5
P 3300 4550
F 0 "#PWR?" H 3300 4400 50  0001 C CNN
F 1 "VCC" H 3317 4723 50  0000 C CNN
F 2 "" H 3300 4550 50  0001 C CNN
F 3 "" H 3300 4550 50  0001 C CNN
	1    3300 4550
	1    0    0    -1  
$EndComp
$Comp
L CPU:Z80CPU U1
U 1 1 604F040E
P 4150 3450
F 0 "U1" H 4150 5131 50  0000 C CNN
F 1 "Z80CPU" H 4150 5040 50  0000 C CNN
F 2 "" H 4150 3850 50  0001 C CNN
F 3 "www.zilog.com/manage_directlink.php?filepath=docs/z80/um0080" H 4150 3850 50  0001 C CNN
	1    4150 3450
	1    0    0    -1  
$EndComp
Wire Wire Line
	3450 3450 3300 3450
$Comp
L power:VCC #PWR?
U 1 1 6050EE1E
P 3300 3450
F 0 "#PWR?" H 3300 3300 50  0001 C CNN
F 1 "VCC" H 3317 3623 50  0000 C CNN
F 2 "" H 3300 3450 50  0001 C CNN
F 3 "" H 3300 3450 50  0001 C CNN
	1    3300 3450
	1    0    0    -1  
$EndComp
$Comp
L Device:C C?
U 1 1 6055A1F9
P 4550 1450
F 0 "C?" V 4298 1450 50  0000 C CNN
F 1 "100nF" V 4389 1450 50  0000 C CNN
F 2 "" H 4588 1300 50  0001 C CNN
F 3 "~" H 4550 1450 50  0001 C CNN
	1    4550 1450
	0    1    1    0   
$EndComp
$Comp
L Device:C C?
U 1 1 6055A9DD
P 4550 1650
F 0 "C?" V 4298 1650 50  0000 C CNN
F 1 "56pF" V 4389 1650 50  0000 C CNN
F 2 "" H 4588 1500 50  0001 C CNN
F 3 "~" H 4550 1650 50  0001 C CNN
	1    4550 1650
	0    1    1    0   
$EndComp
Wire Wire Line
	4700 1450 4700 1550
$Comp
L power:GND #PWR?
U 1 1 60567CC3
P 4800 1550
F 0 "#PWR?" H 4800 1300 50  0001 C CNN
F 1 "GND" H 4805 1377 50  0000 C CNN
F 2 "" H 4800 1550 50  0001 C CNN
F 3 "" H 4800 1550 50  0001 C CNN
	1    4800 1550
	1    0    0    -1  
$EndComp
Wire Wire Line
	4800 1550 4700 1550
Connection ~ 4700 1550
Wire Wire Line
	4700 1550 4700 1650
Wire Wire Line
	4150 1450 4150 1550
Wire Wire Line
	4400 1650 4400 1550
Wire Wire Line
	4400 1550 4150 1550
Connection ~ 4400 1550
Wire Wire Line
	4400 1550 4400 1450
Connection ~ 4150 1550
Wire Wire Line
	4150 1550 4150 1950
Text Notes 4300 1850 0    50   ~ 0
Smoothing caps
Wire Wire Line
	3450 4550 3300 4550
Text Notes 15450 11050 0    50   ~ 0
0.1 alpha
$Comp
L 74xx:74HC04 U11
U 1 1 605236EF
P 2200 1650
F 0 "U11" V 2154 1830 50  0000 L CNN
F 1 "74HC04" V 2245 1830 50  0000 L CNN
F 2 "" H 2200 1650 50  0001 C CNN
F 3 "http://www.nxp.com/documents/data_sheet/74HC_HCT04.pdf" H 2200 1650 50  0001 C CNN
	1    2200 1650
	0    1    1    0   
$EndComp
Wire Wire Line
	3350 1600 3250 1600
Connection ~ 3350 1600
Connection ~ 3350 1500
Wire Wire Line
	3350 1500 3350 1600
Wire Wire Line
	3450 1600 3350 1600
Wire Wire Line
	3750 1150 3900 1150
Connection ~ 3350 1150
Wire Wire Line
	3450 1150 3350 1150
$Comp
L Device:R R?
U 1 1 60584118
P 3600 1150
F 0 "R?" H 3670 1196 50  0000 L CNN
F 1 "270k" H 3670 1105 50  0000 L CNN
F 2 "" V 3530 1150 50  0001 C CNN
F 3 "~" H 3600 1150 50  0001 C CNN
	1    3600 1150
	0    1    1    0   
$EndComp
Text Notes 2550 950  0    50   ~ 0
Reset circuit with\ndebouncing and\npower-on-reset
Wire Wire Line
	3350 2200 3350 2250
Connection ~ 2850 1150
Wire Wire Line
	2850 1150 2850 1500
Wire Wire Line
	2850 1150 2700 1150
$Comp
L power:GND #PWR?
U 1 1 605315B7
P 2700 1150
F 0 "#PWR?" H 2700 900 50  0001 C CNN
F 1 "GND" H 2705 977 50  0000 C CNN
F 2 "" H 2700 1150 50  0001 C CNN
F 3 "" H 2700 1150 50  0001 C CNN
	1    2700 1150
	1    0    0    -1  
$EndComp
$Comp
L power:VCC #PWR?
U 1 1 60530F78
P 3900 1150
F 0 "#PWR?" H 3900 1000 50  0001 C CNN
F 1 "VCC" H 3917 1323 50  0000 C CNN
F 2 "" H 3900 1150 50  0001 C CNN
F 3 "" H 3900 1150 50  0001 C CNN
	1    3900 1150
	1    0    0    -1  
$EndComp
Wire Wire Line
	2900 1500 2850 1500
Wire Wire Line
	3350 1150 3250 1150
Wire Wire Line
	3350 1500 3350 1150
Wire Wire Line
	3200 1500 3350 1500
$Comp
L Device:C C?
U 1 1 6052B4C4
P 3050 1500
F 0 "C?" H 3165 1546 50  0000 L CNN
F 1 "10uF" H 3165 1455 50  0000 L CNN
F 2 "" H 3088 1350 50  0001 C CNN
F 3 "~" H 3050 1500 50  0001 C CNN
	1    3050 1500
	0    1    1    0   
$EndComp
$Comp
L Switch:SW_Push SW1
U 1 1 60528DA4
P 3050 1150
F 0 "SW1" V 3050 1102 50  0000 R CNN
F 1 "SW_Push" V 3005 1102 50  0001 R CNN
F 2 "" H 3050 1350 50  0001 C CNN
F 3 "" H 3050 1350 50  0001 C CNN
	1    3050 1150
	1    0    0    -1  
$EndComp
$Comp
L 74xx:74LS32 U10
U 1 1 6051C888
P 3350 1900
F 0 "U10" H 3350 2225 50  0000 C CNN
F 1 "74LS32" H 3350 2134 50  0000 C CNN
F 2 "" H 3350 1900 50  0001 C CNN
F 3 "http://www.ti.com/lit/gpn/sn74LS32" H 3350 1900 50  0001 C CNN
	1    3350 1900
	0    1    1    0   
$EndComp
$Comp
L Device:C C?
U 1 1 605648D0
P 1100 1350
F 0 "C?" V 848 1350 50  0000 C CNN
F 1 "30pF" V 939 1350 50  0000 C CNN
F 2 "" H 1138 1200 50  0001 C CNN
F 3 "~" H 1100 1350 50  0001 C CNN
	1    1100 1350
	0    1    1    0   
$EndComp
$Comp
L Device:C C?
U 1 1 60567676
P 1100 1950
F 0 "C?" V 848 1950 50  0000 C CNN
F 1 "30pF" V 939 1950 50  0000 C CNN
F 2 "" H 1138 1800 50  0001 C CNN
F 3 "~" H 1100 1950 50  0001 C CNN
	1    1100 1950
	0    1    1    0   
$EndComp
$Comp
L power:GND #PWR?
U 1 1 6056B22E
P 850 1350
F 0 "#PWR?" H 850 1100 50  0001 C CNN
F 1 "GND" H 855 1177 50  0000 C CNN
F 2 "" H 850 1350 50  0001 C CNN
F 3 "" H 850 1350 50  0001 C CNN
	1    850  1350
	1    0    0    -1  
$EndComp
$Comp
L power:GND #PWR?
U 1 1 6056C411
P 850 1950
F 0 "#PWR?" H 850 1700 50  0001 C CNN
F 1 "GND" H 855 1777 50  0000 C CNN
F 2 "" H 850 1950 50  0001 C CNN
F 3 "" H 850 1950 50  0001 C CNN
	1    850  1950
	1    0    0    -1  
$EndComp
Wire Wire Line
	850  1950 950  1950
Wire Wire Line
	850  1350 950  1350
$Comp
L Device:R R?
U 1 1 60581F4C
P 1400 1650
F 0 "R?" H 1470 1696 50  0000 L CNN
F 1 "3,3M" H 1470 1605 50  0000 L CNN
F 2 "" V 1330 1650 50  0001 C CNN
F 3 "~" H 1400 1650 50  0001 C CNN
	1    1400 1650
	1    0    0    -1  
$EndComp
$Comp
L Device:Crystal Y?
U 1 1 6058BCE7
P 1750 1650
F 0 "Y?" V 1704 1781 50  0000 L CNN
F 1 "4Mhz" V 1795 1781 50  0000 L CNN
F 2 "" H 1750 1650 50  0001 C CNN
F 3 "~" H 1750 1650 50  0001 C CNN
	1    1750 1650
	0    1    1    0   
$EndComp
Wire Wire Line
	1250 1350 1400 1350
Wire Wire Line
	1750 1500 1750 1350
Connection ~ 1750 1350
Wire Wire Line
	1750 1350 2200 1350
Wire Wire Line
	1400 1500 1400 1350
Connection ~ 1400 1350
Wire Wire Line
	1400 1350 1750 1350
Wire Wire Line
	1250 1950 1400 1950
Wire Wire Line
	1400 1800 1400 1950
Connection ~ 1400 1950
Wire Wire Line
	1400 1950 1750 1950
Wire Wire Line
	1750 1800 1750 1950
Connection ~ 1750 1950
Wire Wire Line
	1750 1950 2200 1950
Text Notes 1350 2150 0    50   ~ 0
System clock\n    4Mhz
$Comp
L 74xx:74HC04 U11
U 2 1 605A807A
P 2200 2250
F 0 "U11" V 2154 2430 50  0000 L CNN
F 1 "74HC04" V 2245 2430 50  0000 L CNN
F 2 "" H 2200 2250 50  0001 C CNN
F 3 "http://www.nxp.com/documents/data_sheet/74HC_HCT04.pdf" H 2200 2250 50  0001 C CNN
	2    2200 2250
	0    1    1    0   
$EndComp
Wire Wire Line
	3350 2250 3450 2250
Connection ~ 2200 1950
Wire Wire Line
	3450 2550 2200 2550
$Comp
L Device:C C?
U 1 1 606345AE
P 6350 2600
F 0 "C?" V 6098 2600 50  0000 C CNN
F 1 "100nF" V 6189 2600 50  0000 C CNN
F 2 "" H 6388 2450 50  0001 C CNN
F 3 "~" H 6350 2600 50  0001 C CNN
	1    6350 2600
	0    -1   -1   0   
$EndComp
$Comp
L Device:C C?
U 1 1 606345B4
P 6350 2400
F 0 "C?" V 6098 2400 50  0000 C CNN
F 1 "56pF" V 6189 2400 50  0000 C CNN
F 2 "" H 6388 2250 50  0001 C CNN
F 3 "~" H 6350 2400 50  0001 C CNN
	1    6350 2400
	0    -1   -1   0   
$EndComp
Wire Wire Line
	6200 2600 6200 2500
$Comp
L power:GND #PWR?
U 1 1 606345BB
P 6100 2500
F 0 "#PWR?" H 6100 2250 50  0001 C CNN
F 1 "GND" H 6105 2327 50  0000 C CNN
F 2 "" H 6100 2500 50  0001 C CNN
F 3 "" H 6100 2500 50  0001 C CNN
	1    6100 2500
	-1   0    0    1   
$EndComp
Wire Wire Line
	6100 2500 6200 2500
Connection ~ 6200 2500
Wire Wire Line
	6200 2500 6200 2400
Wire Wire Line
	6500 2400 6500 2500
Wire Wire Line
	6500 2500 6750 2500
Connection ~ 6500 2500
Wire Wire Line
	6500 2500 6500 2600
Text Notes 6600 2250 2    50   ~ 0
Smoothing caps
$Comp
L Device:C C?
U 1 1 60649CA8
P 6500 4150
F 0 "C?" V 6248 4150 50  0000 C CNN
F 1 "100nF" V 6339 4150 50  0000 C CNN
F 2 "" H 6538 4000 50  0001 C CNN
F 3 "~" H 6500 4150 50  0001 C CNN
	1    6500 4150
	0    -1   -1   0   
$EndComp
$Comp
L Device:C C?
U 1 1 60649CAE
P 6500 3950
F 0 "C?" V 6248 3950 50  0000 C CNN
F 1 "56pF" V 6339 3950 50  0000 C CNN
F 2 "" H 6538 3800 50  0001 C CNN
F 3 "~" H 6500 3950 50  0001 C CNN
	1    6500 3950
	0    -1   -1   0   
$EndComp
Wire Wire Line
	6350 4150 6350 4050
$Comp
L power:GND #PWR?
U 1 1 60649CB5
P 6250 4050
F 0 "#PWR?" H 6250 3800 50  0001 C CNN
F 1 "GND" H 6255 3877 50  0000 C CNN
F 2 "" H 6250 4050 50  0001 C CNN
F 3 "" H 6250 4050 50  0001 C CNN
	1    6250 4050
	-1   0    0    1   
$EndComp
Wire Wire Line
	6250 4050 6350 4050
Connection ~ 6350 4050
Wire Wire Line
	6350 4050 6350 3950
Text Notes 6750 3800 2    50   ~ 0
Smoothing caps
Wire Wire Line
	6650 3950 6650 4050
Wire Wire Line
	6650 4050 6750 4050
Connection ~ 6650 4050
Wire Wire Line
	6650 4050 6650 4150
Connection ~ 6750 4050
$Comp
L Device:R R?
U 1 1 60661B57
P 1750 2850
F 0 "R?" V 1543 2850 50  0000 C CNN
F 1 "10k" V 1634 2850 50  0000 C CNN
F 2 "" V 1680 2850 50  0001 C CNN
F 3 "~" H 1750 2850 50  0001 C CNN
	1    1750 2850
	0    1    1    0   
$EndComp
$Comp
L Device:R R?
U 1 1 60662809
P 1450 2950
F 0 "R?" V 1243 2950 50  0000 C CNN
F 1 "10k" V 1334 2950 50  0000 C CNN
F 2 "" V 1380 2950 50  0001 C CNN
F 3 "~" H 1450 2950 50  0001 C CNN
	1    1450 2950
	0    1    1    0   
$EndComp
$Comp
L power:VCC #PWR?
U 1 1 60663175
P 1300 2600
F 0 "#PWR?" H 1300 2450 50  0001 C CNN
F 1 "VCC" H 1317 2773 50  0000 C CNN
F 2 "" H 1300 2600 50  0001 C CNN
F 3 "" H 1300 2600 50  0001 C CNN
	1    1300 2600
	1    0    0    -1  
$EndComp
Wire Wire Line
	1300 2600 1300 2850
Wire Wire Line
	1600 2850 1300 2850
Connection ~ 1300 2850
Wire Wire Line
	1300 2850 1300 2950
Wire Wire Line
	1900 2850 3450 2850
Wire Wire Line
	1600 2950 2300 2950
$Comp
L Switch:SW_Push SW?
U 1 1 6067F418
P 850 3050
F 0 "SW?" H 850 3335 50  0000 C CNN
F 1 "Break" H 850 3244 50  0000 C CNN
F 2 "" H 850 3250 50  0001 C CNN
F 3 "" H 850 3250 50  0001 C CNN
	1    850  3050
	1    0    0    -1  
$EndComp
$Comp
L power:GND #PWR?
U 1 1 60681E2A
P 550 3050
F 0 "#PWR?" H 550 2800 50  0001 C CNN
F 1 "GND" H 555 2877 50  0000 C CNN
F 2 "" H 550 3050 50  0001 C CNN
F 3 "" H 550 3050 50  0001 C CNN
	1    550  3050
	1    0    0    -1  
$EndComp
$Comp
L Device:C C?
U 1 1 6068233C
P 850 2600
F 0 "C?" V 598 2600 50  0000 C CNN
F 1 "10uF" V 689 2600 50  0000 C CNN
F 2 "" H 888 2450 50  0001 C CNN
F 3 "~" H 850 2600 50  0001 C CNN
	1    850  2600
	0    1    1    0   
$EndComp
Wire Wire Line
	700  2600 650  2600
Wire Wire Line
	650  2600 650  3050
Wire Wire Line
	550  3050 650  3050
Connection ~ 650  3050
Wire Wire Line
	1000 2600 1050 2600
Wire Wire Line
	1050 2600 1050 3050
Wire Wire Line
	1050 3050 2300 3050
Wire Wire Line
	2300 3050 2300 2950
Connection ~ 1050 3050
Connection ~ 2300 2950
Wire Wire Line
	2300 2950 3450 2950
Text Notes 500  3500 0    50   ~ 0
"Break" button
$Comp
L Connector:Conn_01x01_Male J?
U 1 1 606A5B44
P 3350 700
F 0 "J?" V 3412 744 50  0000 L CNN
F 1 "panel_btn_rst" V 3503 744 50  0000 L CNN
F 2 "" H 3350 700 50  0001 C CNN
F 3 "~" H 3350 700 50  0001 C CNN
	1    3350 700 
	0    1    1    0   
$EndComp
Wire Wire Line
	3350 900  3350 1150
$Comp
L Connector:Conn_01x01_Male J?
U 1 1 606C1179
P 1050 3350
F 0 "J?" V 1204 3262 50  0000 R CNN
F 1 "panel_btn_brk" V 1113 3262 50  0000 R CNN
F 2 "" H 1050 3350 50  0001 C CNN
F 3 "~" H 1050 3350 50  0001 C CNN
	1    1050 3350
	0    -1   -1   0   
$EndComp
Wire Wire Line
	1050 3150 1050 3050
$Comp
L Device:LED D?
U 1 1 606D4ECC
P 2300 3550
F 0 "D?" H 2293 3295 50  0000 C CNN
F 1 "LED" H 2293 3386 50  0000 C CNN
F 2 "" H 2300 3550 50  0001 C CNN
F 3 "~" H 2300 3550 50  0001 C CNN
	1    2300 3550
	-1   0    0    1   
$EndComp
Wire Wire Line
	2450 3550 2600 3550
$Comp
L Device:R R?
U 1 1 606E9AF9
P 2000 3550
F 0 "R?" V 1793 3550 50  0000 C CNN
F 1 "470" V 1884 3550 50  0000 C CNN
F 2 "" V 1930 3550 50  0001 C CNN
F 3 "~" H 2000 3550 50  0001 C CNN
	1    2000 3550
	0    1    1    0   
$EndComp
$Comp
L power:VCC #PWR?
U 1 1 606EA531
P 1750 3550
F 0 "#PWR?" H 1750 3400 50  0001 C CNN
F 1 "VCC" H 1767 3723 50  0000 C CNN
F 2 "" H 1750 3550 50  0001 C CNN
F 3 "" H 1750 3550 50  0001 C CNN
	1    1750 3550
	1    0    0    -1  
$EndComp
Wire Wire Line
	1750 3550 1850 3550
$Comp
L Connector:Conn_01x01_Male J?
U 1 1 60701566
P 2600 3150
F 0 "J?" V 2662 3194 50  0000 L CNN
F 1 "panel_led_halt" V 2753 3194 50  0000 L CNN
F 2 "" H 2600 3150 50  0001 C CNN
F 3 "~" H 2600 3150 50  0001 C CNN
	1    2600 3150
	0    1    1    0   
$EndComp
Wire Wire Line
	2600 3350 2600 3550
Connection ~ 2600 3550
Wire Wire Line
	2600 3550 3450 3550
Wire Bus Line
	7050 1900 9600 1900
Wire Bus Line
	7050 3450 9600 3450
Wire Bus Line
	5250 4050 5250 5150
Wire Bus Line
	5250 2350 5250 3850
Wire Bus Line
	6100 3100 8250 3100
Wire Bus Line
	6100 4650 8250 4650
$EndSCHEMATC