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TRS-80 Color Computer 2 NTSC ( 26-3134B & 26-3136B)

baldengineer·bit-preserve·Tandy-RS/TRS-80 Color Computer/Color Computer 2/26-313xB/coco2/coco2.kicad_pcb

TRS-80 Color Computer 2 NTSC ( 26-3134B & 26-3136B) PCB layout, top view — open source board by baldengineer

About the TRS-80 Color Computer 2 NTSC ( 26-3134B & 26-3136B) PCB

TRS-80 Color Computer 2 NTSC ( 26-3134B & 26-3136B) is an open source PCB design by baldengineer, published on GitHub under the CC-BY-4.0 license. It is a 2-layer board measuring 230 × 170 mm, with 150 components from 68 distinct parts.

Other key parts include the MC6809E, SN74LS785N, MC6847T1, 6821 and SC67331P. By type, the board carries 53 capacitors, 32 resistors, 20 ICs, 12 connectors, 12 diodes and 5 inductors.

It belongs with the retro computing designs in this gallery.

From the project

Project for capturing vintage, classic, aka old computer schematics in KiCad.

This directory contains a KiCad project for the schematic & PCB of the TRS-80 Color Computer 2 To view and edit you will need KiCAD 6 or greater. models 26-3134B and 26-3136B.

Schematics are not available for this model: The reference board was donated by MrDave6309

Main components on the TRS-80 Color Computer 2 NTSC ( 26-3134B & 26-3136B)

MC6809ESN74LS785NMC6847T16821SC67331PSC77526SC77527P27C128TMS441674LS138KM416474LS02A1A2A3

TRS-80 Color Computer 2 NTSC ( 26-3134B & 26-3136B) bill of materials (BOM)

150 components, 68 distinct parts.

QtyPartRefs
1
MC6809E
IC1
1
SN74LS785N
IC2
1
MC6847T1
IC3
1
6821
IC4
1
SC67331P
IC5
1
SC77526
IC6
1
SC77527P
IC7
1
27C128
IC8
2
TMS4416
IC10, IC11
1
74LS138
IC12
8
KM4164
IC14, IC15, IC16, IC17, IC18, IC19, IC20, IC21
1
74LS02
IC22
1
A1
A1
1
A2
A2
1
A3
A3
1
KSD880O
Q1
1
14.31818 Mhz
X1
1
Conn_02x20_Odd_Even
CN1
1
Conn_01x16_Female
CN2
2
Conn_01x12_Female
CN3, CN4
Show 48 more
QtyPartRefs
4
128K 64K
J1, J3, J4, J5
1
64K 128K
J2
1
SolderJumper_2_Open
J6
1
Conn_01x02
J7
1
Conn_01x09
J8
1
Right Joystick
JK1
1
Left Joystick
JK2
1
RS232
JK3
1
Cassette
JK4
1
SolderJumper_2_Open
JP8
1
RF_modulator
MDV-6
1
J0971CS5VDC.45
RY1
1
SW_DPDT_x2
SW1
1
SW_DPDT_x2-Switch
SW2
1
Reset Switch
SW3
1
C_Variable
TC1
6
1N4148
D1, D2, D3, D4, D7, D12
2
1KF20-04
D5, D6
2
1N4002
D8, D9
2
1N5401
D10, D11
5
Ferrite_Bead_Small
FB1, FB2, FB3, FB4, FB5
26
.1uF
C1, C2, C4, C5, C6, C7, C10, C12 +18
1
1uF 50V
C8
4
100uF 16v
C9, C11, C34, C54
1
39pF
C13
1
33pF
C14
2
56pF
C15, C17
1
47uF 16v
C19
2
150pF
C21, C23
2
1800pF
C24, C25
10
.022uF
C26, C27, C28, C29, C30, C33, C40, C41 +2
1
10uF NP
C32
1
4700uF 16V
C36
1
220uF 16V
C38
6
10k
R1, R2, R3, R4, R8, R9
1
100 1/2W
R5
4
100
R6, R11, R12, R29
1
150
R7
8
4.7K
R10, R15, R16, R17, R18, R19, R20, R32
2
100K
R13, R14
1
1.5k
R21
1
510
R22
1
220 1/2W
R23
1
51
R24
1
.1 ohms 1W
R25
2
1K
R26, R27
1
270 1/2W
R28
2
33
R30, R31

TRS-80 Color Computer 2 NTSC ( 26-3134B & 26-3136B) design files

The KiCad project lives in the baldengineer/bit-preserve repository on GitHub; these links point at the commit this page was built from.

TRS-80 Color Computer 2 NTSC ( 26-3134B & 26-3136B): common questions

How big is the TRS-80 Color Computer 2 NTSC ( 26-3134B & 26-3136B) PCB?

The TRS-80 Color Computer 2 NTSC ( 26-3134B & 26-3136B) measures 230 × 170 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the TRS-80 Color Computer 2 NTSC ( 26-3134B & 26-3136B)?

150 components, from 68 distinct parts. The full bill of materials is listed on this page.

Where can I download the TRS-80 Color Computer 2 NTSC ( 26-3134B & 26-3136B) design files?

From the baldengineer/bit-preserve 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 Color Computer 2 NTSC ( 26-3134B & 26-3136B) design in my own project?

Yes, under the terms of its CC-BY-4.0 license, which baldengineer chose for the repository.

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