EESchema Schematic File Version 4
EELAYER 30 0
EELAYER END
$Descr A4 11693 8268
encoding utf-8
Sheet 3 3
Title "TashTwenty Tiny"
Date "2022-03-20"
Rev "1.0"
Comp "Lostwave"
Comment1 "https://68kmla.org"
Comment2 "https://68kmla.org/bb/index.php?threads/tashtwenty-single-chip-dcd-hard-disk-20-interface.39357/"
Comment3 "https://github.com/lampmerchant/tashtwenty"
Comment4 ""
$EndDescr
$Comp
L power:+12V #PWR0103
U 1 1 61A7DDE6
P 1500 1500
F 0 "#PWR0103" H 1500 1350 50  0001 C CNN
F 1 "+12V" H 1515 1673 50  0000 C CNN
F 2 "" H 1500 1500 50  0001 C CNN
F 3 "" H 1500 1500 50  0001 C CNN
	1    1500 1500
	1    0    0    -1  
$EndComp
$Comp
L Device:LED D1
U 1 1 61A7E10E
P 1500 2250
F 0 "D1" V 1539 2132 50  0000 R CNN
F 1 "LED" V 1448 2132 50  0000 R CNN
F 2 "LED_THT:LED_D5.0mm_Horizontal_O3.81mm_Z3.0mm" H 1500 2250 50  0001 C CNN
F 3 "~" H 1500 2250 50  0001 C CNN
	1    1500 2250
	0    -1   -1   0   
$EndComp
$Comp
L power:GND #PWR0119
U 1 1 61A7EA4F
P 1500 2500
F 0 "#PWR0119" H 1500 2250 50  0001 C CNN
F 1 "GND" H 1505 2327 50  0000 C CNN
F 2 "" H 1500 2500 50  0001 C CNN
F 3 "" H 1500 2500 50  0001 C CNN
	1    1500 2500
	1    0    0    -1  
$EndComp
$Comp
L Device:R R8
U 1 1 61A7F7FD
P 1500 1800
F 0 "R8" H 1570 1846 50  0000 L CNN
F 1 "1200" H 1570 1755 50  0000 L CNN
F 2 "Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal" V 1430 1800 50  0001 C CNN
F 3 "~" H 1500 1800 50  0001 C CNN
	1    1500 1800
	1    0    0    -1  
$EndComp
Wire Wire Line
	1500 2100 1500 1950
Wire Wire Line
	1500 1650 1500 1500
Wire Wire Line
	1500 2500 1500 2400
$Comp
L 74xx:74LS08 U2
U 2 1 61A7FDAB
P 6400 1500
F 0 "U2" H 6400 1825 50  0000 C CNN
F 1 "74ACT08" H 6400 1734 50  0000 C CNN
F 2 "Package_DIP:DIP-14_W7.62mm" H 6400 1500 50  0001 C CNN
F 3 "http://www.ti.com/lit/gpn/sn74LS08" H 6400 1500 50  0001 C CNN
	2    6400 1500
	1    0    0    -1  
$EndComp
$Comp
L 74xx:74LS08 U2
U 3 1 61A839C6
P 6400 2500
F 0 "U2" H 6400 2825 50  0000 C CNN
F 1 "74ACT08" H 6400 2734 50  0000 C CNN
F 2 "Package_DIP:DIP-14_W7.62mm" H 6400 2500 50  0001 C CNN
F 3 "http://www.ti.com/lit/gpn/sn74LS08" H 6400 2500 50  0001 C CNN
	3    6400 2500
	1    0    0    -1  
$EndComp
$Comp
L Device:LED_Dual_ACA D2
U 1 1 61A8E744
P 7650 2000
F 0 "D2" H 7650 1653 50  0000 C CNN
F 1 "LED_Dual_ACA" H 7650 1744 50  0000 C CNN
F 2 "LED_THT:LED_D5.0mm-3_Horizontal_O3.81mm_Z3.0mm" H 7650 2000 50  0001 C CNN
F 3 "~" H 7650 2000 50  0001 C CNN
	1    7650 2000
	-1   0    0    1   
$EndComp
$Comp
L Device:R R11
U 1 1 61A90834
P 7000 2500
F 0 "R11" V 6793 2500 50  0000 C CNN
F 1 "330" V 6884 2500 50  0000 C CNN
F 2 "Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal" V 6930 2500 50  0001 C CNN
F 3 "~" H 7000 2500 50  0001 C CNN
	1    7000 2500
	0    1    1    0   
$EndComp
$Comp
L Device:R R10
U 1 1 61A90C1F
P 7000 1500
F 0 "R10" V 6793 1500 50  0000 C CNN
F 1 "330" V 6884 1500 50  0000 C CNN
F 2 "Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal" V 6930 1500 50  0001 C CNN
F 3 "~" H 7000 1500 50  0001 C CNN
	1    7000 1500
	0    1    1    0   
$EndComp
Wire Wire Line
	6700 1500 6850 1500
Wire Wire Line
	6700 2500 6850 2500
Wire Wire Line
	7350 1900 7250 1900
Wire Wire Line
	7250 1900 7250 1500
Wire Wire Line
	7250 1500 7150 1500
Wire Wire Line
	7150 2500 7250 2500
Wire Wire Line
	7250 2500 7250 2100
Wire Wire Line
	7250 2100 7350 2100
Wire Wire Line
	8100 2000 7950 2000
Text GLabel 4300 1800 0    50   Input ~ 0
RD
Text GLabel 6000 2600 0    50   Input ~ 0
WR
Wire Wire Line
	6000 2600 6100 2600
$Comp
L 74xx:74LS08 U2
U 1 1 61A935ED
P 6400 3500
F 0 "U2" H 6400 3825 50  0000 C CNN
F 1 "74ACT08" H 6400 3734 50  0000 C CNN
F 2 "Package_DIP:DIP-14_W7.62mm" H 6400 3500 50  0001 C CNN
F 3 "http://www.ti.com/lit/gpn/sn74LS08" H 6400 3500 50  0001 C CNN
	1    6400 3500
	1    0    0    -1  
$EndComp
Text GLabel 6000 3600 0    50   Input ~ 0
~ENABLE
Wire Wire Line
	6000 3600 6100 3600
Wire Wire Line
	4300 1800 4450 1800
Wire Wire Line
	5750 2300 5750 2400
Wire Wire Line
	5750 1900 5750 2000
$Comp
L power:+5V #PWR0121
U 1 1 61A97370
P 5750 1900
F 0 "#PWR0121" H 5750 1750 50  0001 C CNN
F 1 "+5V" H 5765 2073 50  0000 C CNN
F 2 "" H 5750 1900 50  0001 C CNN
F 3 "" H 5750 1900 50  0001 C CNN
	1    5750 1900
	1    0    0    -1  
$EndComp
$Comp
L Device:R R9
U 1 1 61A96CB0
P 5750 2150
F 0 "R9" H 5820 2196 50  0000 L CNN
F 1 "10k" H 5820 2105 50  0000 L CNN
F 2 "Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal" V 5680 2150 50  0001 C CNN
F 3 "~" H 5750 2150 50  0001 C CNN
	1    5750 2150
	1    0    0    -1  
$EndComp
$Comp
L power:+5V #PWR0124
U 1 1 61AB25B5
P 5250 900
F 0 "#PWR0124" H 5250 750 50  0001 C CNN
F 1 "+5V" H 5265 1073 50  0000 C CNN
F 2 "" H 5250 900 50  0001 C CNN
F 3 "" H 5250 900 50  0001 C CNN
	1    5250 900 
	1    0    0    -1  
$EndComp
$Comp
L Device:R R13
U 1 1 61AB25BF
P 5250 1250
F 0 "R13" H 5320 1296 50  0000 L CNN
F 1 "10k" H 5320 1205 50  0000 L CNN
F 2 "Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal" V 5180 1250 50  0001 C CNN
F 3 "~" H 5250 1250 50  0001 C CNN
	1    5250 1250
	1    0    0    -1  
$EndComp
$Comp
L Transistor_BJT:BC337 Q1
U 1 1 61AB9694
P 5150 1800
F 0 "Q1" H 5341 1846 50  0000 L CNN
F 1 "BC337" H 5341 1755 50  0000 L CNN
F 2 "Package_TO_SOT_THT:TO-92_Inline" H 5350 1725 50  0001 L CIN
F 3 "https://diotec.com/tl_files/diotec/files/pdf/datasheets/bc337.pdf" H 5150 1800 50  0001 L CNN
	1    5150 1800
	1    0    0    -1  
$EndComp
$Comp
L Device:R R12
U 1 1 61ABBEBE
P 4600 1800
F 0 "R12" V 4393 1800 50  0000 C CNN
F 1 "10k" V 4484 1800 50  0000 C CNN
F 2 "Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal" V 4530 1800 50  0001 C CNN
F 3 "~" H 4600 1800 50  0001 C CNN
	1    4600 1800
	0    1    1    0   
$EndComp
Wire Wire Line
	4750 1800 4950 1800
$Comp
L power:GND #PWR0125
U 1 1 61ABD1D4
P 5250 2100
F 0 "#PWR0125" H 5250 1850 50  0001 C CNN
F 1 "GND" H 5255 1927 50  0000 C CNN
F 2 "" H 5250 2100 50  0001 C CNN
F 3 "" H 5250 2100 50  0001 C CNN
	1    5250 2100
	1    0    0    -1  
$EndComp
Wire Wire Line
	5250 2100 5250 2000
Wire Wire Line
	5250 1600 5250 1500
Connection ~ 5250 1500
Wire Wire Line
	5250 900  5250 1100
Wire Wire Line
	5250 1500 5750 1500
Wire Wire Line
	5250 1500 5250 1400
Wire Wire Line
	8100 2000 8100 3500
Wire Wire Line
	5750 1600 5750 1500
Wire Wire Line
	5750 1600 6100 1600
Wire Wire Line
	5750 1500 5750 1400
Wire Wire Line
	5750 1400 6100 1400
Connection ~ 5750 1500
Wire Wire Line
	5750 3400 5750 2400
Wire Wire Line
	5750 2400 6100 2400
Connection ~ 5750 2400
Wire Wire Line
	5750 3400 6100 3400
Wire Wire Line
	6700 3500 8100 3500
Text Notes 6600 3950 0    50   Italic 0
This gate will sink the led when /ENABLE is low.\n\nRead is /ENABLE low AND RD low\nWrite is /ENABLE low and WR high
$EndSCHEMATC