Apple-1-HW/RC6502-Apple-1-Replica
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RC6502-Apple-1-Replica/RC6502 VDU Color Amplifier/RC6502 VDU Color.sch

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EESchema Schematic File Version 2
LIBS:power
LIBS:device
LIBS:switches
LIBS:relays
LIBS:motors
LIBS:transistors
LIBS:conn
LIBS:linear
LIBS:regul
LIBS:74xx
LIBS:cmos4000
LIBS:adc-dac
LIBS:memory
LIBS:xilinx
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:RC6502 VDU Color-cache
EELAYER 25 0
EELAYER END
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encoding utf-8
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Wire Wire Line
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Wire Wire Line
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$EndComp
NoConn ~ 3650 2000
Wire Wire Line
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Wire Wire Line
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Wire Wire Line
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Wire Wire Line
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F 3 "" H 6575 2500 50 0001 C CNN
1 6575 2500
1 0 0 -1
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L GND #PWR06
U 1 1 5C6B4C49
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F 2 "" H 6575 2650 50 0001 C CNN
F 3 "" H 6575 2650 50 0001 C CNN
1 6575 2650
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Wire Wire Line
6575 2200 6575 2350
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F 2 "TO_SOT_Packages_THT:TO-92_Inline_Wide" H 7125 2200 50 0001 L CIN
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1 6925 2275
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Connection ~ 6575 2275
Wire Wire Line
7025 925 7025 2075
Connection ~ 6575 1350
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L R R6
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F 3 "" H 7025 3175 50 0001 C CNN
1 7025 3175
-1 0 0 1
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$Comp
L GND #PWR07
U 1 1 5C6B5241
P 7025 3325
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F 3 "" H 7025 3325 50 0001 C CNN
1 7025 3325
1 0 0 -1
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Wire Wire Line
7025 2475 7025 3025
Wire Wire Line
6200 2950 7100 2950
Connection ~ 7025 2950
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L R R7
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F 1 "75" V 7250 2950 50 0000 C CNN
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F 3 "" H 7250 2950 50 0001 C CNN
1 7250 2950
0 1 1 0
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$Comp
L R R4
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1 6200 2500
-1 0 0 1
$EndComp
Wire Wire Line
6200 2650 6200 2950
Text Notes 7350 7500 0 60 ~ 0
RC6502 VDU Color Amplifier
Text Notes 7000 6850 0 60 ~ 0
The original VDU amplifier circuit was intended for use with a B/W monitor, this one\nattempts to add color to the module. This has been adapted from example shown in\nMC6847 datasheet. Note that this replaces the oscillator on the main board!
$Comp
L Conn_01x04 J1
U 1 1 5C6C2ED6
P 1550 4100
F 0 "J1" H 1550 4300 50 0000 C CNN
F 1 "Video_IN" H 1550 3800 50 0000 C CNN
F 2 "Pin_Headers:Pin_Header_Straight_1x04_Pitch2.54mm" H 1550 4100 50 0001 C CNN
F 3 "" H 1550 4100 50 0001 C CNN
1 1550 4100
-1 0 0 -1
$EndComp
$Comp
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F 3 "" H 1550 3100 50 0001 C CNN
1 1550 3100
-1 0 0 -1
$EndComp
$Comp
L GND #PWR08
U 1 1 5C6C36D1
P 1825 4375
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F 2 "" H 1825 4375 50 0001 C CNN
F 3 "" H 1825 4375 50 0001 C CNN
1 1825 4375
1 0 0 -1
$EndComp
NoConn ~ 1750 3300
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1750 4300 1825 4300
Wire Wire Line
1825 4300 1825 4375
NoConn ~ 1750 4200
$Comp
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F 3 "" H 1850 3375 50 0001 C CNN
1 1850 3375
1 0 0 -1
$EndComp
Wire Wire Line
1850 3100 1850 3375
Wire Wire Line
2575 2000 2575 2075
$Comp
L VCC #PWR010
U 1 1 5C6C4AEA
P 1825 3925
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F 2 "" H 1825 3925 50 0001 C CNN
F 3 "" H 1825 3925 50 0001 C CNN
1 1825 3925
1 0 0 -1
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Wire Wire Line
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Wire Wire Line
1825 4000 1750 4000
NoConn ~ 1750 2200
$Comp
L POT RV1
U 1 1 5C6C8619
P 5800 2200
F 0 "RV1" V 5800 2200 50 0000 C CNN
F 1 "1k" V 5700 2200 50 0000 C CNN
F 2 "Potentiometers:Potentiometer_Trimmer_Bourns_3296W" H 5800 2200 50 0001 C CNN
F 3 "" H 5800 2200 50 0001 C CNN
1 5800 2200
0 1 1 0
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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 Wire Line
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Text Label 1775 2100 0 60 ~ 0
CLK
Wire Wire Line
1750 2100 2100 2100
Wire Wire Line
1750 2300 2100 2300
Wire Wire Line
1750 2400 2100 2400
Wire Wire Line
1750 2500 2100 2500
Entry Wire Line
2100 2100 2200 2200
Entry Wire Line
2100 2300 2200 2400
Entry Wire Line
2100 2400 2200 2500
Entry Wire Line
2100 2500 2200 2600
Text Label 1775 4100 0 60 ~ 0
Y
Wire Wire Line
1750 4100 2100 4100
Entry Wire Line
2100 4100 2200 4200
Text Label 3625 2300 2 60 ~ 0
CHB
Text Label 3625 2400 2 60 ~ 0
@A
Text Label 3625 2200 2 60 ~ 0
@B
Wire Wire Line
3300 2200 3650 2200
Wire Wire Line
3300 2300 3650 2300
Wire Wire Line
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Entry Wire Line
3200 2100 3300 2200
Entry Wire Line
3200 2200 3300 2300
Entry Wire Line
3200 2300 3300 2400
Wire Wire Line
3300 2500 3650 2500
Entry Wire Line
3200 2400 3300 2500
Text Label 3625 2500 2 60 ~ 0
Y
Wire Bus Line
2200 2200 2200 4200
Wire Wire Line
1750 3100 1850 3100
Wire Wire Line
1750 3200 1850 3200
Connection ~ 1850 3200
Wire Bus Line
3200 1700 3200 6275
$Comp
L GND #PWR011
U 1 1 5C6CCB4D
P 2675 5750
F 0 "#PWR011" H 2675 5500 50 0001 C CNN
F 1 "GND" H 2675 5600 50 0000 C CNN
F 2 "" H 2675 5750 50 0001 C CNN
F 3 "" H 2675 5750 50 0001 C CNN
1 2675 5750
1 0 0 -1
$EndComp
$Comp
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F 1 "50pF" H 1850 5525 50 0000 L CNN
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F 3 "" H 1825 5625 50 0001 C CNN
1 1825 5625
-1 0 0 1
$EndComp
$Comp
L Crystal Y1
U 1 1 5C6CD17F
P 2250 5375
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F 1 "3.579545" H 2250 5225 50 0000 C CNN
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F 3 "" H 2250 5375 50 0001 C CNN
1 2250 5375
1 0 0 -1
$EndComp
$Comp
L C C4
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P 2675 5600
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F 3 "" H 2675 5600 50 0001 C CNN
1 2675 5600
-1 0 0 1
$EndComp
Text Label 3075 6175 2 60 ~ 0
CLK
Wire Wire Line
1500 6175 3100 6175
Entry Wire Line
3100 6175 3200 6275
Text Label 3625 1800 2 60 ~ 0
CLK
Wire Wire Line
3300 1800 3650 1800
Entry Wire Line
3200 1700 3300 1800
$Comp
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F 3 "" H 1500 5650 50 0001 C CNN
1 1500 5650
-1 0 0 1
$EndComp
Wire Wire Line
1825 5475 1825 5375
Wire Wire Line
1500 5375 2100 5375
Wire Wire Line
2400 5375 3100 5375
Wire Wire Line
2675 5375 2675 5450
Text Label 3075 5375 2 60 ~ 0
OSC_IN
Entry Wire Line
3100 5375 3200 5475
Text Label 3625 1900 2 60 ~ 0
OSC_IN
Wire Wire Line
3300 1900 3650 1900
Entry Wire Line
3200 1800 3300 1900
Connection ~ 2675 5375
$Comp
L GND #PWR012
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F 3 "" H 1825 5775 50 0001 C CNN
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1 0 0 -1
$EndComp
Wire Wire Line
1500 5500 1500 5375
Connection ~ 1825 5375
Wire Wire Line
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NoConn ~ 5950 2200
Text GLabel 1750 3000 2 60 Input ~ 0
VIDEO
Text GLabel 7475 2950 2 60 Output ~ 0
VIDEO
Wire Wire Line
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Wire Bus Line
2200 4200 3200 4200
$Comp
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F 3 "" H 4775 1175 50 0001 C CNN
1 4775 1175
1 0 0 -1
$EndComp
$Comp
L GND #PWR013
U 1 1 5C6D2F12
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F 0 "#PWR013" H 4775 1025 50 0001 C CNN
F 1 "GND" H 4775 1125 50 0000 C CNN
F 2 "" H 4775 1275 50 0001 C CNN
F 3 "" H 4775 1275 50 0001 C CNN
1 4775 1275
1 0 0 -1
$EndComp
Wire Wire Line
4575 925 4575 1250
Wire Wire Line
4775 1075 4775 1000
Wire Wire Line
4775 1000 4575 1000
Connection ~ 4575 1000
$Comp
L Conn_01x02 J4
U 1 1 5C6D5C68
P 1550 4875
F 0 "J4" H 1550 4975 50 0000 C CNN
F 1 "OSC_EN" H 1550 4675 50 0000 C CNN
F 2 "Pin_Headers:Pin_Header_Straight_1x02_Pitch2.54mm" H 1550 4875 50 0001 C CNN
F 3 "" H 1550 4875 50 0001 C CNN
1 1550 4875
-1 0 0 -1
$EndComp
NoConn ~ 1750 4875
NoConn ~ 1750 4975
NoConn ~ 1750 1900
$Comp
L VCC #PWR?
U 1 1 5C772014
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F 0 "#PWR?" H 7025 775 50 0001 C CNN
F 1 "VCC" H 7025 1075 50 0000 C CNN
F 2 "" H 7025 925 50 0001 C CNN
F 3 "" H 7025 925 50 0001 C CNN
1 7025 925
1 0 0 -1
$EndComp
Connection ~ 7025 1350
$EndSCHEMATC
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