HardLabs

Keyboard

apuder·MiniTRS·kicad/v1.0/keyboard/keyboard.kicad_pcb

Keyboard PCB layout, top view — open source board by apuder

About the Keyboard PCB

Keyboard is an open source PCB design by apuder, published on GitHub. It is a 2-layer board measuring 145 × 71.6 mm, with 104 components from 74 distinct parts.

Other key parts include the 74LS07, 74LS138 and 74LS157. By type, the board carries 72 switches, 12 connectors, 11 resistors, 4 ICs, 4 capacitors and 1 diode.

It belongs with the keyboards designs in this gallery.

From the project

mini-trs by Sascha Häberling Micro Model III by Lawrence Kesteloot

Main components on the Keyboard

74LS0774LS13874LS157

Keyboard bill of materials (BOM)

104 components, 74 distinct parts.

QtyPartRefs
2
74LS07
U1, U3
1
74LS138
U2
1
74LS157
U4
1
PMOD
J1
2
Conn_01x02
J2, J3
1
Interface Connector
J4
1
Programmer
J5
1
Barrel_Jack_Switch
J6
1
Pwr Supply
J7
1
Pwr Switch
J8
2
SD_Card
J9, J12
1
Cassette Input
J10
1
Cassette Output
J11
1
@
SW1
1
A
SW2
1
B
SW3
1
C
SW4
1
D
SW5
1
E
SW6
1
F
SW7
Show 54 more
QtyPartRefs
1
G
SW8
1
H
SW9
1
I
SW10
1
J
SW11
1
K
SW12
1
L
SW13
1
M
SW14
1
N
SW15
1
O
SW16
1
P
SW17
1
Q
SW18
1
R
SW19
1
S
SW20
1
T
SW21
1
U
SW22
1
V
SW23
1
W
SW24
1
X
SW25
1
Y
SW26
1
Z
SW27
2
0
SW28, SW36
2
1
SW29, SW37
2
2
SW30, SW38
2
3
SW31, SW39
2
4
SW32, SW40
2
5
SW33, SW41
2
6
SW34, SW42
2
7
SW35, SW43
2
8
SW44, SW47
2
9
SW45, SW48
2
.
SW46, SW53
1
:
SW49
1
;
SW50
1
,
SW51
1
-
SW52
1
/
SW54
3
ENTER
SW55, SW56, SW69
1
CLEAR
SW57
1
BREAK
SW58
1
UP
SW59
1
DOWN
SW60
1
LEFT
SW61
1
RIGHT
SW62
3
SPACE
SW63, SW67, SW68
1
RESET
SW64
1
RSHIFT
SW65
1
LSHIFT
SW66
1
ESP_RESET
SW70
1
PTRS_RESET
SW71
1
TRS_IO_STATUS
SW72
1
LED_RKBG
D1
4
0.1uF
C1, C2, C3, C4
9
1k
R1, R2, R3, R4, R5, R6, R7, R8 +1
2
10K
R16, R18

Keyboard design files

The KiCad project lives in the apuder/MiniTRS repository on GitHub; these links point at the commit this page was built from.

Keyboard: common questions

How big is the Keyboard PCB?

The Keyboard measures 145 × 71.6 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Keyboard?

104 components, from 74 distinct parts. The full bill of materials is listed on this page.

Where can I download the Keyboard design files?

From the apuder/MiniTRS repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the Keyboard design in my own project?

The repository has no license, so all rights stay with apuder. Use it as a reference, and ask the author before reusing the design.

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