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TRS-80-Model-I-Keyboard-ALPS

RetroStack·TRS-80-Model-I-Keyboard-ALPS·KiCAD/TRS80_Model_I_Keyboard_ALPS_E1.kicad_pcb

TRS-80-Model-I-Keyboard-ALPS PCB layout, top view — open source board by RetroStack

About the TRS-80-Model-I-Keyboard-ALPS PCB

TRS-80-Model-I-Keyboard-ALPS is an open source PCB design by RetroStack, published on GitHub under the MIT license. It is a 2-layer board measuring 378 × 122 mm, with 75 components from 60 distinct parts.

By type, the board carries 65 switches, 2 capacitors, 2 resistors, 1 connector and 1 LED.

It belongs with the keyboards designs in this gallery.

From the project

Hardware Replica of the TRS-80 Model I ALPS Keyboard PCB

This project is a faithful reimplementation of the ALPS keyboard PCB of the iconic TRS-80 Model 1 computer. My revision, the E1, is designed to replicate the PCB design 1-to-1 of the original down to the traces. The entire project is available under the MIT license.

In the "Latest" folder, you'll find the most up-to-date design files, including:

- Gerber files suitable for popular online PCB manufacturers like PCBWay and JLCPCB. Most manufacturers should be fine with either. - A Bill of Materials (BOM) in PDF format. - The full schematics of the E1 replica which is 1:1 to the original G…

TRS-80-Model-I-Keyboard-ALPS, from the project README
From the project README

TRS-80-Model-I-Keyboard-ALPS bill of materials (BOM)

75 components, 60 distinct parts.

QtyPartRefs
1
Connection Keyboad Side
J1
1
@
SW1
1
H
SW2
1
P
SW3
1
X
SW4
2
0
SW5, SW54
2
8
SW6, SW55
2
ENTER
SW7, SW56
1
LSHIFT
SW8
1
RSHIFT
SW9
1
A
SW10
1
I
SW11
1
Q
SW12
1
Y
SW13
2
1
SW14, SW57
2
9
SW15, SW58
1
CLEAR
SW16
1
B
SW17
1
J
SW18
1
R
SW19
Show 40 more
QtyPartRefs
1
Z
SW20
2
2
SW21, SW59
1
:
SW22
1
BREAK
SW23
1
C
SW24
1
K
SW25
1
S
SW26
2
3
SW27, SW60
1
;
SW28
1
UP
SW29
1
D
SW30
1
L
SW31
1
T
SW32
2
4
SW33, SW61
1
,
SW34
1
DOWN
SW35
1
E
SW36
1
M
SW37
1
U
SW38
2
5
SW39, SW62
1
-
SW40
1
LEFT
SW41
1
F
SW42
1
N
SW43
1
V
SW44
2
6
SW45, SW63
2
.
SW46, SW64
1
RIGHT
SW47
1
G
SW48
1
O
SW49
1
W
SW50
2
7
SW51, SW65
1
/
SW52
1
SPACE
SW53
2
74LS05
Z1, Z2
2
74LS368
Z3, Z4
1
RED 5mm
CR1
2
0.1uF
C1, C2
1
4.7k
R1
1
330
R2

TRS-80-Model-I-Keyboard-ALPS design files

The KiCad project lives in the RetroStack/TRS-80-Model-I-Keyboard-ALPS repository on GitHub; these links point at the commit this page was built from.

TRS-80-Model-I-Keyboard-ALPS: common questions

How big is the TRS-80-Model-I-Keyboard-ALPS PCB?

The TRS-80-Model-I-Keyboard-ALPS measures 378 × 122 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the TRS-80-Model-I-Keyboard-ALPS?

75 components, from 60 distinct parts. The full bill of materials is listed on this page.

Where can I download the TRS-80-Model-I-Keyboard-ALPS design files?

From the RetroStack/TRS-80-Model-I-Keyboard-ALPS repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the TRS-80-Model-I-Keyboard-ALPS design in my own project?

Yes, under the terms of its MIT license, which RetroStack chose for the repository.

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