Apple-2-HW/unified_retro_keyboard
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Removed vestigial R4 resistor and moved R3 to be on RX line.

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Now, R3 only needs to be installed when using the serial port.  A zero-ohm
jumper can be used for serial-only output.
This commit is contained in:
Dave 2020-08-18 15:32:53 -05:00
parent 973602856f
commit efc4c7b5ab
2 changed files with 1630 additions and 1729 deletions
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3290
hardware/interface-ascii/interface-ascii.kicad_pcb
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File diff suppressed because it is too large Load Diff

69
hardware/interface-ascii/interface-ascii.sch
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@ -5,8 +5,8 @@ $Descr USLetter 11000 8500
encoding utf-8
Sheet 1 1
Title "ASCII Interface for Unified Retro Keyboard"
Date "2020-06-22"
Rev "2.8"
Date "2020-08-18"
Rev "2.9"
Comp "OSIWeb.org"
Comment1 "Main Keyboard Interface"
Comment2 ""
@ -753,47 +753,24 @@ Text Label 3485 1555 0 50 ~ 0
SCK-LED2
Text Label 3480 1755 0 50 ~ 0
~RESET
Wire Wire Line
4760 5150 5100 5150
Wire Wire Line
5100 5050 4760 5050
Wire Wire Line
4460 5050 4310 5050
Wire Wire Line
3900 5150 4210 5150
$Comp
L Device:R_US R3
U 1 1 5DD9ECD2
P 4610 5050
F 0 "R3" V 4570 4850 50 0000 C CNN
F 1 "470" V 4520 5050 50 0000 C CNN
F 2 "Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal" V 4650 5040 50 0001 C CNN
F 3 "~" H 4610 5050 50 0001 C CNN
F 4 "Y" H 4610 5050 50 0001 C CNN "Fitted"
F 5 "470" H 4610 5050 50 0001 C CNN "Label"
F 6 "Y" H 4610 5050 50 0001 C CNN "May substitute"
F 7 "Yageo" H 4610 5050 50 0001 C CNN "Manufacturer"
F 8 "MFR-25FTE52-470R" H 4610 5050 50 0001 C CNN "Manufacturer PN"
F 9 "470" H 4610 5050 50 0001 C CNN "Part Value"
1 4610 5050
0 1 1 0
$EndComp
$Comp
L Device:R_US R4
U 1 1 5DDA0995
P 4610 5150
F 0 "R4" V 4570 4950 50 0000 C CNN
F 1 "470" V 4496 5150 50 0001 C CNN
F 2 "Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal" V 4650 5140 50 0001 C CNN
F 3 "~" H 4610 5150 50 0001 C CNN
F 4 "Y" H 4610 5150 50 0001 C CNN "Fitted"
F 5 "470" H 4610 5150 50 0001 C CNN "Label"
F 6 "Y" H 4610 5150 50 0001 C CNN "May substitute"
F 7 "Yageo" H 4610 5150 50 0001 C CNN "Manufacturer"
F 8 "MFR-25FTE52-470R" H 4610 5150 50 0001 C CNN "Manufacturer PN"
F 9 "470" H 4610 5150 50 0001 C CNN "Part Value"
1 4610 5150
0 1 1 0
P 4310 6170
F 0 "R3" H 4385 6295 50 0000 C CNN
F 1 "470" H 4405 6055 50 0000 C CNN
F 2 "Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal" V 4350 6160 50 0001 C CNN
F 3 "~" H 4310 6170 50 0001 C CNN
F 4 "Y" H 4310 6170 50 0001 C CNN "Fitted"
F 5 "470" H 4310 6170 50 0001 C CNN "Label"
F 6 "Y" H 4310 6170 50 0001 C CNN "May substitute"
F 7 "Yageo" H 4310 6170 50 0001 C CNN "Manufacturer"
F 8 "MFR-25FTE52-470R" H 4310 6170 50 0001 C CNN "Manufacturer PN"
F 9 "470" H 4310 6170 50 0001 C CNN "Part Value"
1 4310 6170
1 0 0 -1
$EndComp
Wire Wire Line
5860 6070 5860 6510
@ -2247,14 +2224,11 @@ Wire Wire Line
4730 7820 4100 7820
Wire Wire Line
4100 7820 4100 7710
Connection ~ 4310 5050
Connection ~ 4210 5150
Wire Wire Line
3900 5050 4310 5050
Wire Wire Line
4310 5050 4310 6710
Wire Wire Line
4210 5150 4460 5150
4310 5050 4310 6020
Text Label 7950 6500 0 50 ~ 0
Row8
Entry Wire Line
@ -2467,12 +2441,19 @@ Text Label 1260 2685 0 50 ~ 0
OUT1
Text Label 1260 2585 0 50 ~ 0
OUT3
Wire Bus Line
5200 3850 5200 6640
Wire Wire Line
4310 6320 4310 6710
Wire Wire Line
4210 5150 5100 5150
Wire Bus Line
10075 1350 10075 6705
Wire Bus Line
5200 3850 5200 6640
Wire Bus Line
1975 875 1975 6640
Wire Bus Line
7800 1350 7800 6705
Connection ~ 4310 5050
Wire Wire Line
4310 5050 5100 5050
$EndSCHEMATC