HardLabs

Keyboard

btb·Telcon-Ambassador·boards/keyboard/keyboard.kicad_pcb

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

About the Keyboard PCB

Keyboard is an open source PCB design by btb, published on GitHub. It is a 2-layer board measuring 394.1 × 155.1 mm, with 137 components from 111 distinct parts.

By type, the board carries 76 switches, 24 resistors, 17 capacitors, 3 diodes, 1 connector and 1 LED.

It belongs with the keyboards designs in this gallery.

From the project

The Telcon Ambassador was a series of portable terminals by Telcon Industries (who later created the Zorba portable computer).

The Telcon Ambassador was a series of portable terminals by Telcon Industries (who later created the Zorba portable computer).

The info here is primarily derived from my reverse-engineering of a Telcon Ambassador IV which I acquired in very rough shape.

Keyboard bill of materials (BOM)

137 components, 111 distinct parts.

QtyPartRefs
1
Keyboard Connector
J1
2
Conn_01x01_Male
E1, E2
1
A9
E3
1
GND
E4
1
BREAK
S1
1
1 !
S2
1
2 "
S3
1
3 #
S4
1
4 $
S5
1
5 %
S6
1
6 &
S7
1
7 ’
S8
1
8 (
S9
1
9 )
S10
1
0 '
S11
1
- =
S12
1
↑ ≈
S13
1
\ ¦
S14
1
BACK SPACE
S15
1
S16
S16
Show 91 more
QtyPartRefs
1
S17
S17
1
S18
S18
1
ESC
S19
1
CTRL
S20
1
Q
S21
1
W
S22
1
E
S23
1
R
S24
1
T
S25
1
Y
S26
1
U
S27
1
I
S28
1
O
S29
1
P
S30
1
@ NULL
S31
1
[ {
S32
1
] }
S33
1
LINE FEED
S34
1
S35
S35
1
UP
S36
1
S37
S37
1
PRINT XMIT
S38
1
SHIFT LOCK
S39
1
A
S40
1
S
S41
1
D
S42
1
F
S43
1
G
S44
1
H
S45
1
J
S46
1
K
S47
1
L
S48
1
; +
S49
1
: *
S50
1
_ RUB OUT
S51
1
RETURN
S52
1
LEFT
S53
1
HOME
S54
1
RIGHT
S55
1
SET MODE
S56
1
L SHIFT
S57
1
Z
S58
1
X
S59
1
C
S60
1
V
S61
1
B
S62
1
N
S63
1
M
S64
1
, <
S65
1
. >
S66
1
/ ?
S67
1
R SHIFT
S68
1
S69
S69
1
DOWN
S70
1
S71
S71
1
CLEAR SCRN
S72
1
SPACE
S73
1
S74
S74
1
S75
S75
1
S76
S76
1
NE555P
Z1
1
74LS74
Z2
2
74LS123
Z3, Z11
1
74LS00
Z4
1
74LS04
Z5
1
74LS06
Z6
1
2758
Z7
1
AY-3-4592
Z8
1
900C
Z9
1
4051
Z10
1
LED
CR4
3
D_Small_ALT
D1, D2, D3
9
33nF
C1, C3, C5, C8, C9, C11, C12, C15 +1
1
10uF
C2
1
1uF
C4
1
10uF
C6
2
220pF
C7, C10
1
470pF
C13
1
1uF
C14
1
1uF
C17
2
680R
R1, R10
4
33K
R2, R8, R20, R21
10
3K3
R3, R4, R5, R11, R12, R13, R17, R19 +2
1
82R
R6
1
7K5
R7
1
10K
R9
1
27K
R14
1
15K
R15
1
470K
R16
1
160K
R18
1
3K3
RN1

Keyboard design files

The KiCad project lives in the btb/Telcon-Ambassador 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 394.1 × 155.1 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Keyboard?

137 components, from 111 distinct parts. The full bill of materials is listed on this page.

Where can I download the Keyboard design files?

From the btb/Telcon-Ambassador 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 btb. Use it as a reference, and ask the author before reusing the design.

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